./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:11:15,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:11:15,380 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:11:15,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:11:15,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:11:15,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:11:15,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:11:15,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:11:15,440 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:11:15,440 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:11:15,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:11:15,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:11:15,441 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:11:15,441 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:11:15,442 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:11:15,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:11:15,442 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:11:15,442 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:11:15,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:11:15,460 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:11:15,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:11:15,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:11:15,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:11:15,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:11:15,476 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:11:15,476 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:11:15,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:11:15,477 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:11:15,477 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:11:15,478 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:11:15,478 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:11:15,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:11:15,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:11:15,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:11:15,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:11:15,479 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:11:15,479 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:11:15,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:11:15,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:11:15,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:11:15,480 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:11:15,480 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:11:15,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:11:15,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:11:15,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:11:15,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:11:15,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:11:15,953 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:11:15,954 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:11:15,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-20 12:11:17,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:11:17,944 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:11:17,945 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-20 12:11:17,980 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31b0187d/b7631a0e5e3d4fda805569995d36aa20/FLAGb4f3ada8d [2024-02-20 12:11:18,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31b0187d/b7631a0e5e3d4fda805569995d36aa20 [2024-02-20 12:11:18,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:11:18,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:11:18,011 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:11:18,012 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:11:18,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:11:18,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172956ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18, skipping insertion in model container [2024-02-20 12:11:18,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:11:18,352 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2024-02-20 12:11:18,365 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:11:18,381 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:11:18,405 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2024-02-20 12:11:18,412 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:11:18,436 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:11:18,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18 WrapperNode [2024-02-20 12:11:18,437 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:11:18,440 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:11:18,440 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:11:18,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:11:18,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,510 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-02-20 12:11:18,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:11:18,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:11:18,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:11:18,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:11:18,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,546 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,587 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-20 12:11:18,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,598 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,603 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,605 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:11:18,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:11:18,609 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:11:18,609 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:11:18,610 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (1/1) ... [2024-02-20 12:11:18,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:11:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:18,650 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) [2024-02-20 12:11:18,671 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 [2024-02-20 12:11:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:11:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:11:18,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:11:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:11:18,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:11:18,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:11:18,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:11:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:11:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:11:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:11:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:11:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:11:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:11:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:11:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:11:18,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:11:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:11:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:11:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:11:18,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:11:18,717 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:11:18,892 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:11:18,894 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:11:19,238 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:11:19,239 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:11:19,449 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:11:19,449 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 12:11:19,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:11:19 BoogieIcfgContainer [2024-02-20 12:11:19,451 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:11:19,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:11:19,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:11:19,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:11:19,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:11:18" (1/3) ... [2024-02-20 12:11:19,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea97a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:11:19, skipping insertion in model container [2024-02-20 12:11:19,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:18" (2/3) ... [2024-02-20 12:11:19,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea97a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:11:19, skipping insertion in model container [2024-02-20 12:11:19,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:11:19" (3/3) ... [2024-02-20 12:11:19,468 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-02-20 12:11:19,509 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:11:19,509 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:11:19,510 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:11:19,581 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:11:19,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-02-20 12:11:19,680 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-02-20 12:11:19,693 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:11:19,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-20 12:11:19,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-02-20 12:11:19,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-02-20 12:11:19,713 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:11:19,721 INFO L369 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=All, 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;@6e8cbd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:11:19,722 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 12:11:19,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:11:19,752 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-20 12:11:19,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:11:19,753 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:19,754 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:19,754 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:19,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1306973434, now seen corresponding path program 1 times [2024-02-20 12:11:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864520772] [2024-02-20 12:11:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:20,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864520772] [2024-02-20 12:11:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864520772] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:20,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:20,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:11:20,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574987611] [2024-02-20 12:11:20,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:20,412 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:11:20,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:11:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:11:20,533 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-20 12:11:20,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-02-20 12:11:20,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:20,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-20 12:11:20,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:20,654 INFO L124 PetriNetUnfolderBase]: 73/151 cut-off events. [2024-02-20 12:11:20,666 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-20 12:11:20,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 151 events. 73/151 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 515 event pairs, 21 based on Foata normal form. 5/153 useless extension candidates. Maximal degree in co-relation 233. Up to 105 conditions per place. [2024-02-20 12:11:20,671 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 18 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2024-02-20 12:11:20,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 127 flow [2024-02-20 12:11:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:11:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:11:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-02-20 12:11:20,694 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-02-20 12:11:20,697 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2024-02-20 12:11:20,698 INFO L507 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 127 flow [2024-02-20 12:11:20,698 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-02-20 12:11:20,698 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:20,698 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:20,699 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:11:20,699 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:20,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1187982182, now seen corresponding path program 1 times [2024-02-20 12:11:20,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:20,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787278399] [2024-02-20 12:11:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:20,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:20,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:20,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787278399] [2024-02-20 12:11:20,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787278399] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:20,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:20,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:21,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944362265] [2024-02-20 12:11:21,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:21,001 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:21,011 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:21,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:21,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:21,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:21,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:21,229 INFO L124 PetriNetUnfolderBase]: 179/333 cut-off events. [2024-02-20 12:11:21,230 INFO L125 PetriNetUnfolderBase]: For 114/116 co-relation queries the response was YES. [2024-02-20 12:11:21,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 333 events. 179/333 cut-off events. For 114/116 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1190 event pairs, 42 based on Foata normal form. 8/341 useless extension candidates. Maximal degree in co-relation 745. Up to 191 conditions per place. [2024-02-20 12:11:21,235 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 38 selfloop transitions, 4 changer transitions 13/58 dead transitions. [2024-02-20 12:11:21,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 58 transitions, 360 flow [2024-02-20 12:11:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-02-20 12:11:21,243 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-02-20 12:11:21,244 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2024-02-20 12:11:21,244 INFO L507 AbstractCegarLoop]: Abstraction has has 31 places, 58 transitions, 360 flow [2024-02-20 12:11:21,245 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:21,245 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:21,245 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:21,245 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:11:21,245 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:21,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1656710680, now seen corresponding path program 2 times [2024-02-20 12:11:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:21,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282164285] [2024-02-20 12:11:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:21,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:21,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282164285] [2024-02-20 12:11:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282164285] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:21,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795964654] [2024-02-20 12:11:21,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:21,474 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:21,545 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:21,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 58 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:21,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:21,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:21,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:21,732 INFO L124 PetriNetUnfolderBase]: 224/406 cut-off events. [2024-02-20 12:11:21,752 INFO L125 PetriNetUnfolderBase]: For 227/243 co-relation queries the response was YES. [2024-02-20 12:11:21,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 406 events. 224/406 cut-off events. For 227/243 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1583 event pairs, 39 based on Foata normal form. 9/409 useless extension candidates. Maximal degree in co-relation 1284. Up to 298 conditions per place. [2024-02-20 12:11:21,755 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 67 selfloop transitions, 11 changer transitions 17/98 dead transitions. [2024-02-20 12:11:21,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 98 transitions, 781 flow [2024-02-20 12:11:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-02-20 12:11:21,759 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-02-20 12:11:21,760 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-02-20 12:11:21,761 INFO L507 AbstractCegarLoop]: Abstraction has has 35 places, 98 transitions, 781 flow [2024-02-20 12:11:21,761 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:21,761 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:21,762 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:21,762 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:11:21,762 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:21,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:21,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1936776188, now seen corresponding path program 3 times [2024-02-20 12:11:21,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:21,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796811159] [2024-02-20 12:11:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:21,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:21,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:21,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796811159] [2024-02-20 12:11:21,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796811159] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:21,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656239651] [2024-02-20 12:11:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:11:21,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:21,952 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) [2024-02-20 12:11:22,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:11:22,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:11:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:22,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:22,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:22,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656239651] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:22,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 12:11:22,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-02-20 12:11:22,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398844879] [2024-02-20 12:11:22,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:22,292 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:11:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:11:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-20 12:11:22,297 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-02-20 12:11:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 98 transitions, 781 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-02-20 12:11:22,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:22,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-02-20 12:11:22,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:22,469 INFO L124 PetriNetUnfolderBase]: 235/427 cut-off events. [2024-02-20 12:11:22,469 INFO L125 PetriNetUnfolderBase]: For 363/369 co-relation queries the response was YES. [2024-02-20 12:11:22,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1991 conditions, 427 events. 235/427 cut-off events. For 363/369 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1674 event pairs, 11 based on Foata normal form. 9/429 useless extension candidates. Maximal degree in co-relation 1670. Up to 317 conditions per place. [2024-02-20 12:11:22,474 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 84 selfloop transitions, 15 changer transitions 20/124 dead transitions. [2024-02-20 12:11:22,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 124 transitions, 1222 flow [2024-02-20 12:11:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:11:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:11:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-02-20 12:11:22,487 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-02-20 12:11:22,488 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2024-02-20 12:11:22,488 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 124 transitions, 1222 flow [2024-02-20 12:11:22,489 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-02-20 12:11:22,489 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:22,489 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:22,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:22,703 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:22,703 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:22,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:22,703 INFO L85 PathProgramCache]: Analyzing trace with hash 233029576, now seen corresponding path program 4 times [2024-02-20 12:11:22,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:22,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538530810] [2024-02-20 12:11:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:22,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:22,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538530810] [2024-02-20 12:11:22,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538530810] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:22,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:22,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:22,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510869492] [2024-02-20 12:11:22,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:22,851 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:22,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:22,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:22,859 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:22,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 124 transitions, 1222 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:22,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:22,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:22,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:23,008 INFO L124 PetriNetUnfolderBase]: 253/460 cut-off events. [2024-02-20 12:11:23,008 INFO L125 PetriNetUnfolderBase]: For 666/672 co-relation queries the response was YES. [2024-02-20 12:11:23,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2559 conditions, 460 events. 253/460 cut-off events. For 666/672 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1854 event pairs, 10 based on Foata normal form. 4/457 useless extension candidates. Maximal degree in co-relation 2176. Up to 324 conditions per place. [2024-02-20 12:11:23,012 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 99 selfloop transitions, 18 changer transitions 22/142 dead transitions. [2024-02-20 12:11:23,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 142 transitions, 1672 flow [2024-02-20 12:11:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-02-20 12:11:23,015 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-02-20 12:11:23,017 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2024-02-20 12:11:23,017 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 142 transitions, 1672 flow [2024-02-20 12:11:23,017 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:23,017 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:23,017 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:23,018 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 12:11:23,018 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:23,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash -840967356, now seen corresponding path program 5 times [2024-02-20 12:11:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:23,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149865516] [2024-02-20 12:11:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149865516] [2024-02-20 12:11:23,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149865516] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476023082] [2024-02-20 12:11:23,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:11:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:23,204 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:11:23,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:11:23,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:23,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:23,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:23,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:23,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:23,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476023082] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:23,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-02-20 12:11:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151659007] [2024-02-20 12:11:23,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:23,347 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 12:11:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 12:11:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:11:23,358 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 142 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2024-02-20 12:11:23,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:23,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:23,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:23,547 INFO L124 PetriNetUnfolderBase]: 353/642 cut-off events. [2024-02-20 12:11:23,548 INFO L125 PetriNetUnfolderBase]: For 1380/1386 co-relation queries the response was YES. [2024-02-20 12:11:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 642 events. 353/642 cut-off events. For 1380/1386 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2886 event pairs, 9 based on Foata normal form. 12/647 useless extension candidates. Maximal degree in co-relation 3676. Up to 490 conditions per place. [2024-02-20 12:11:23,553 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 116 selfloop transitions, 40 changer transitions 29/188 dead transitions. [2024-02-20 12:11:23,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 188 transitions, 2591 flow [2024-02-20 12:11:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 12:11:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 12:11:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-02-20 12:11:23,555 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-02-20 12:11:23,556 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2024-02-20 12:11:23,557 INFO L507 AbstractCegarLoop]: Abstraction has has 51 places, 188 transitions, 2591 flow [2024-02-20 12:11:23,557 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2024-02-20 12:11:23,557 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:23,557 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:23,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:23,769 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-20 12:11:23,769 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:23,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1273265374, now seen corresponding path program 6 times [2024-02-20 12:11:23,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:23,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18329709] [2024-02-20 12:11:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:23,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:23,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:23,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18329709] [2024-02-20 12:11:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18329709] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:23,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134975750] [2024-02-20 12:11:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:23,880 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:23,889 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:23,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 188 transitions, 2591 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:23,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:23,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:23,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:24,062 INFO L124 PetriNetUnfolderBase]: 348/632 cut-off events. [2024-02-20 12:11:24,078 INFO L125 PetriNetUnfolderBase]: For 1696/1702 co-relation queries the response was YES. [2024-02-20 12:11:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4686 conditions, 632 events. 348/632 cut-off events. For 1696/1702 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2818 event pairs, 9 based on Foata normal form. 4/629 useless extension candidates. Maximal degree in co-relation 4151. Up to 489 conditions per place. [2024-02-20 12:11:24,085 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 133 selfloop transitions, 18 changer transitions 29/183 dead transitions. [2024-02-20 12:11:24,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 183 transitions, 2881 flow [2024-02-20 12:11:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-02-20 12:11:24,086 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-02-20 12:11:24,087 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-02-20 12:11:24,087 INFO L507 AbstractCegarLoop]: Abstraction has has 55 places, 183 transitions, 2881 flow [2024-02-20 12:11:24,087 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:24,087 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:24,088 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:24,088 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-20 12:11:24,088 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:24,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash 199268442, now seen corresponding path program 7 times [2024-02-20 12:11:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098719308] [2024-02-20 12:11:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:24,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:24,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098719308] [2024-02-20 12:11:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098719308] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794866583] [2024-02-20 12:11:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:11:24,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:24,237 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) [2024-02-20 12:11:24,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:11:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:24,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:24,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:24,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:24,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794866583] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:24,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:24,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-02-20 12:11:24,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671279691] [2024-02-20 12:11:24,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:24,496 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-20 12:11:24,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-20 12:11:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-02-20 12:11:24,505 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:24,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 183 transitions, 2881 flow. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 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) [2024-02-20 12:11:24,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:24,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:24,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:24,662 INFO L124 PetriNetUnfolderBase]: 344/621 cut-off events. [2024-02-20 12:11:24,662 INFO L125 PetriNetUnfolderBase]: For 2171/2177 co-relation queries the response was YES. [2024-02-20 12:11:24,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5189 conditions, 621 events. 344/621 cut-off events. For 2171/2177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2695 event pairs, 7 based on Foata normal form. 10/624 useless extension candidates. Maximal degree in co-relation 4610. Up to 481 conditions per place. [2024-02-20 12:11:24,668 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 121 selfloop transitions, 28 changer transitions 29/181 dead transitions. [2024-02-20 12:11:24,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 181 transitions, 3198 flow [2024-02-20 12:11:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 12:11:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 12:11:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-02-20 12:11:24,680 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.515527950310559 [2024-02-20 12:11:24,681 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2024-02-20 12:11:24,682 INFO L507 AbstractCegarLoop]: Abstraction has has 61 places, 181 transitions, 3198 flow [2024-02-20 12:11:24,683 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 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) [2024-02-20 12:11:24,683 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:24,683 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:24,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:24,895 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:24,895 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:24,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 169735477, now seen corresponding path program 1 times [2024-02-20 12:11:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:24,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181200958] [2024-02-20 12:11:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:25,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181200958] [2024-02-20 12:11:25,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181200958] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473303241] [2024-02-20 12:11:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:25,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:25,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:25,128 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) [2024-02-20 12:11:25,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:11:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:25,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-20 12:11:25,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:25,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:25,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473303241] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:25,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:25,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-02-20 12:11:25,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090807991] [2024-02-20 12:11:25,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:25,373 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 12:11:25,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 12:11:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-20 12:11:25,381 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-20 12:11:25,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 181 transitions, 3198 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2024-02-20 12:11:25,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:25,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-20 12:11:25,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:25,593 INFO L124 PetriNetUnfolderBase]: 587/1059 cut-off events. [2024-02-20 12:11:25,593 INFO L125 PetriNetUnfolderBase]: For 2614/2668 co-relation queries the response was YES. [2024-02-20 12:11:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 1059 events. 587/1059 cut-off events. For 2614/2668 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5008 event pairs, 33 based on Foata normal form. 41/1100 useless extension candidates. Maximal degree in co-relation 8842. Up to 888 conditions per place. [2024-02-20 12:11:25,616 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 160 selfloop transitions, 11 changer transitions 60/270 dead transitions. [2024-02-20 12:11:25,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 270 transitions, 5281 flow [2024-02-20 12:11:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:11:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:11:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-20 12:11:25,617 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-20 12:11:25,618 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2024-02-20 12:11:25,618 INFO L507 AbstractCegarLoop]: Abstraction has has 64 places, 270 transitions, 5281 flow [2024-02-20 12:11:25,618 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2024-02-20 12:11:25,618 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:25,618 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:25,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:25,831 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:25,831 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:25,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 442871043, now seen corresponding path program 2 times [2024-02-20 12:11:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:25,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16523842] [2024-02-20 12:11:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16523842] [2024-02-20 12:11:26,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16523842] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834464269] [2024-02-20 12:11:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:26,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:26,034 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) [2024-02-20 12:11:26,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:11:26,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:26,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:26,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:26,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:26,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834464269] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:26,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:26,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-20 12:11:26,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305972237] [2024-02-20 12:11:26,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:26,293 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:11:26,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:11:26,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:11:26,297 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:26,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 270 transitions, 5281 flow. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 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) [2024-02-20 12:11:26,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:26,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:26,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:27,574 INFO L124 PetriNetUnfolderBase]: 991/1714 cut-off events. [2024-02-20 12:11:27,588 INFO L125 PetriNetUnfolderBase]: For 6240/6339 co-relation queries the response was YES. [2024-02-20 12:11:27,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17304 conditions, 1714 events. 991/1714 cut-off events. For 6240/6339 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8450 event pairs, 13 based on Foata normal form. 45/1752 useless extension candidates. Maximal degree in co-relation 16335. Up to 1515 conditions per place. [2024-02-20 12:11:27,640 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 289 selfloop transitions, 196 changer transitions 127/617 dead transitions. [2024-02-20 12:11:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 617 transitions, 13242 flow [2024-02-20 12:11:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 12:11:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 12:11:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 243 transitions. [2024-02-20 12:11:27,642 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45935727788279773 [2024-02-20 12:11:27,643 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2024-02-20 12:11:27,643 INFO L507 AbstractCegarLoop]: Abstraction has has 86 places, 617 transitions, 13242 flow [2024-02-20 12:11:27,643 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 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) [2024-02-20 12:11:27,643 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:27,643 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:27,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:27,855 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-20 12:11:27,856 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:27,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -763733189, now seen corresponding path program 3 times [2024-02-20 12:11:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:27,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197399309] [2024-02-20 12:11:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:27,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197399309] [2024-02-20 12:11:28,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197399309] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662039144] [2024-02-20 12:11:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:11:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:28,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:28,092 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) [2024-02-20 12:11:28,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:11:28,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:11:28,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:28,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:28,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:28,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662039144] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:28,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-20 12:11:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343178882] [2024-02-20 12:11:28,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:28,365 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:11:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:11:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:11:28,380 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:28,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 617 transitions, 13242 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2024-02-20 12:11:28,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:28,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:29,954 INFO L124 PetriNetUnfolderBase]: 1557/2591 cut-off events. [2024-02-20 12:11:29,955 INFO L125 PetriNetUnfolderBase]: For 12733/12849 co-relation queries the response was YES. [2024-02-20 12:11:29,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28358 conditions, 2591 events. 1557/2591 cut-off events. For 12733/12849 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12810 event pairs, 18 based on Foata normal form. 36/2623 useless extension candidates. Maximal degree in co-relation 27579. Up to 2310 conditions per place. [2024-02-20 12:11:30,022 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 458 selfloop transitions, 265 changer transitions 167/895 dead transitions. [2024-02-20 12:11:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 895 transitions, 21017 flow [2024-02-20 12:11:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 12:11:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 12:11:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 304 transitions. [2024-02-20 12:11:30,025 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4720496894409938 [2024-02-20 12:11:30,026 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 88 predicate places. [2024-02-20 12:11:30,026 INFO L507 AbstractCegarLoop]: Abstraction has has 113 places, 895 transitions, 21017 flow [2024-02-20 12:11:30,032 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2024-02-20 12:11:30,032 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:30,033 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:30,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-20 12:11:30,246 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:30,246 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:30,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1452096957, now seen corresponding path program 4 times [2024-02-20 12:11:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:30,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402098536] [2024-02-20 12:11:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:30,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:30,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402098536] [2024-02-20 12:11:30,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402098536] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:30,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955278313] [2024-02-20 12:11:30,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:11:30,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:30,455 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) [2024-02-20 12:11:30,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:11:30,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:11:30,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:30,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:30,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:30,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:30,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955278313] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:30,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-20 12:11:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816490919] [2024-02-20 12:11:30,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:30,696 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:11:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:11:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:11:30,720 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:30,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 895 transitions, 21017 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2024-02-20 12:11:30,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:30,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:30,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:32,854 INFO L124 PetriNetUnfolderBase]: 2260/3767 cut-off events. [2024-02-20 12:11:32,868 INFO L125 PetriNetUnfolderBase]: For 22725/22895 co-relation queries the response was YES. [2024-02-20 12:11:32,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44695 conditions, 3767 events. 2260/3767 cut-off events. For 22725/22895 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20217 event pairs, 20 based on Foata normal form. 114/3868 useless extension candidates. Maximal degree in co-relation 43854. Up to 3394 conditions per place. [2024-02-20 12:11:32,936 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 627 selfloop transitions, 473 changer transitions 215/1320 dead transitions. [2024-02-20 12:11:32,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 1320 transitions, 33690 flow [2024-02-20 12:11:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-20 12:11:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-20 12:11:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 345 transitions. [2024-02-20 12:11:32,950 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-02-20 12:11:32,950 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 120 predicate places. [2024-02-20 12:11:32,950 INFO L507 AbstractCegarLoop]: Abstraction has has 145 places, 1320 transitions, 33690 flow [2024-02-20 12:11:32,950 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2024-02-20 12:11:32,951 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:32,951 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:32,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:33,164 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:33,165 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:33,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1839444345, now seen corresponding path program 5 times [2024-02-20 12:11:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569988799] [2024-02-20 12:11:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:33,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569988799] [2024-02-20 12:11:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569988799] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206954353] [2024-02-20 12:11:33,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:11:33,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:33,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:33,335 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) [2024-02-20 12:11:33,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:11:33,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:11:33,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:33,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 12:11:33,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:33,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206954353] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:33,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:33,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-02-20 12:11:33,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036878751] [2024-02-20 12:11:33,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:33,682 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 12:11:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 12:11:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-02-20 12:11:33,692 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:33,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 1320 transitions, 33690 flow. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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) [2024-02-20 12:11:33,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:33,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:33,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:36,606 INFO L124 PetriNetUnfolderBase]: 2813/4815 cut-off events. [2024-02-20 12:11:36,606 INFO L125 PetriNetUnfolderBase]: For 34018/34200 co-relation queries the response was YES. [2024-02-20 12:11:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61599 conditions, 4815 events. 2813/4815 cut-off events. For 34018/34200 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 28323 event pairs, 26 based on Foata normal form. 136/4941 useless extension candidates. Maximal degree in co-relation 60606. Up to 4353 conditions per place. [2024-02-20 12:11:36,742 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 879 selfloop transitions, 630 changer transitions 346/1860 dead transitions. [2024-02-20 12:11:36,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1860 transitions, 51375 flow [2024-02-20 12:11:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-20 12:11:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-20 12:11:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 353 transitions. [2024-02-20 12:11:36,753 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41480611045828436 [2024-02-20 12:11:36,754 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 156 predicate places. [2024-02-20 12:11:36,754 INFO L507 AbstractCegarLoop]: Abstraction has has 181 places, 1860 transitions, 51375 flow [2024-02-20 12:11:36,760 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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) [2024-02-20 12:11:36,760 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:36,760 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:36,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:36,972 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-20 12:11:36,972 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:36,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -330987363, now seen corresponding path program 6 times [2024-02-20 12:11:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774489566] [2024-02-20 12:11:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774489566] [2024-02-20 12:11:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774489566] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259714583] [2024-02-20 12:11:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:11:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:37,297 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) [2024-02-20 12:11:37,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:11:37,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:11:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:37,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:37,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:37,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259714583] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:37,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603714168] [2024-02-20 12:11:37,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:37,751 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:37,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:37,763 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:37,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 1860 transitions, 51375 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-02-20 12:11:37,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:37,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:37,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:41,007 INFO L124 PetriNetUnfolderBase]: 2941/5041 cut-off events. [2024-02-20 12:11:41,007 INFO L125 PetriNetUnfolderBase]: For 43944/44136 co-relation queries the response was YES. [2024-02-20 12:11:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69013 conditions, 5041 events. 2941/5041 cut-off events. For 43944/44136 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 30091 event pairs, 28 based on Foata normal form. 36/5064 useless extension candidates. Maximal degree in co-relation 67952. Up to 4540 conditions per place. [2024-02-20 12:11:41,188 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1252 selfloop transitions, 327 changer transitions 359/1943 dead transitions. [2024-02-20 12:11:41,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 1943 transitions, 57527 flow [2024-02-20 12:11:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 12:11:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 12:11:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 203 transitions. [2024-02-20 12:11:41,193 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44130434782608696 [2024-02-20 12:11:41,194 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 175 predicate places. [2024-02-20 12:11:41,194 INFO L507 AbstractCegarLoop]: Abstraction has has 200 places, 1943 transitions, 57527 flow [2024-02-20 12:11:41,194 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-02-20 12:11:41,208 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:41,208 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:41,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:41,421 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 12:11:41,421 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2044148415, now seen corresponding path program 7 times [2024-02-20 12:11:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150441113] [2024-02-20 12:11:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:41,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:41,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150441113] [2024-02-20 12:11:41,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150441113] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:41,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408995218] [2024-02-20 12:11:41,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:11:41,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:41,645 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) [2024-02-20 12:11:41,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:11:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:41,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:41,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:41,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:41,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408995218] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:41,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:41,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667819616] [2024-02-20 12:11:41,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:41,888 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:41,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:41,906 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:41,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 1943 transitions, 57527 flow. Second operand has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 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) [2024-02-20 12:11:41,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:41,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:41,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:47,035 INFO L124 PetriNetUnfolderBase]: 4296/7376 cut-off events. [2024-02-20 12:11:47,036 INFO L125 PetriNetUnfolderBase]: For 78114/78393 co-relation queries the response was YES. [2024-02-20 12:11:47,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107547 conditions, 7376 events. 4296/7376 cut-off events. For 78114/78393 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 46908 event pairs, 44 based on Foata normal form. 147/7495 useless extension candidates. Maximal degree in co-relation 106418. Up to 6676 conditions per place. [2024-02-20 12:11:47,185 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1485 selfloop transitions, 879 changer transitions 431/2800 dead transitions. [2024-02-20 12:11:47,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 2800 transitions, 88471 flow [2024-02-20 12:11:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-02-20 12:11:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-02-20 12:11:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 445 transitions. [2024-02-20 12:11:47,189 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4499494438827098 [2024-02-20 12:11:47,190 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 217 predicate places. [2024-02-20 12:11:47,190 INFO L507 AbstractCegarLoop]: Abstraction has has 242 places, 2800 transitions, 88471 flow [2024-02-20 12:11:47,190 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 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) [2024-02-20 12:11:47,190 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:47,190 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:47,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:47,402 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 12:11:47,402 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:47,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1102807077, now seen corresponding path program 8 times [2024-02-20 12:11:47,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:47,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942994035] [2024-02-20 12:11:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:47,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:47,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942994035] [2024-02-20 12:11:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942994035] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:47,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47343397] [2024-02-20 12:11:47,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:47,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:47,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:47,638 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) [2024-02-20 12:11:47,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:11:47,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:47,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:47,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:47,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:47,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47343397] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:47,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:47,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-20 12:11:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320235120] [2024-02-20 12:11:47,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:47,934 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:11:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:47,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:11:47,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:11:47,938 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:47,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 2800 transitions, 88471 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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) [2024-02-20 12:11:47,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:47,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:47,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:54,468 INFO L124 PetriNetUnfolderBase]: 5212/8970 cut-off events. [2024-02-20 12:11:54,469 INFO L125 PetriNetUnfolderBase]: For 107985/108311 co-relation queries the response was YES. [2024-02-20 12:11:54,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139044 conditions, 8970 events. 5212/8970 cut-off events. For 107985/108311 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 59193 event pairs, 72 based on Foata normal form. 96/9035 useless extension candidates. Maximal degree in co-relation 137847. Up to 8133 conditions per place. [2024-02-20 12:11:54,782 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1701 selfloop transitions, 1158 changer transitions 506/3370 dead transitions. [2024-02-20 12:11:54,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 3370 transitions, 113265 flow [2024-02-20 12:11:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 12:11:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 12:11:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 295 transitions. [2024-02-20 12:11:54,788 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4580745341614907 [2024-02-20 12:11:54,789 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 244 predicate places. [2024-02-20 12:11:54,790 INFO L507 AbstractCegarLoop]: Abstraction has has 269 places, 3370 transitions, 113265 flow [2024-02-20 12:11:54,790 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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) [2024-02-20 12:11:54,790 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:54,790 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:54,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:55,003 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-20 12:11:55,004 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:55,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2116449063, now seen corresponding path program 9 times [2024-02-20 12:11:55,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:55,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388308170] [2024-02-20 12:11:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:55,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:55,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388308170] [2024-02-20 12:11:55,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388308170] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698922715] [2024-02-20 12:11:55,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:11:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:55,224 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) [2024-02-20 12:11:55,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:11:55,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:11:55,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:55,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:11:55,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:55,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:55,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698922715] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:55,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:55,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239531361] [2024-02-20 12:11:55,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:55,459 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:55,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:55,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:55,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:55,479 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:55,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 3370 transitions, 113265 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-02-20 12:11:55,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:55,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:55,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:03,058 INFO L124 PetriNetUnfolderBase]: 5212/8977 cut-off events. [2024-02-20 12:12:03,058 INFO L125 PetriNetUnfolderBase]: For 122124/122431 co-relation queries the response was YES. [2024-02-20 12:12:03,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147417 conditions, 8977 events. 5212/8977 cut-off events. For 122124/122431 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 59246 event pairs, 70 based on Foata normal form. 53/9002 useless extension candidates. Maximal degree in co-relation 146152. Up to 8139 conditions per place. [2024-02-20 12:12:03,186 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 2107 selfloop transitions, 750 changer transitions 515/3377 dead transitions. [2024-02-20 12:12:03,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 3377 transitions, 120251 flow [2024-02-20 12:12:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 12:12:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 12:12:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 191 transitions. [2024-02-20 12:12:03,190 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4884910485933504 [2024-02-20 12:12:03,191 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 260 predicate places. [2024-02-20 12:12:03,191 INFO L507 AbstractCegarLoop]: Abstraction has has 285 places, 3377 transitions, 120251 flow [2024-02-20 12:12:03,192 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-02-20 12:12:03,192 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:12:03,192 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:12:03,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-02-20 12:12:03,405 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-20 12:12:03,405 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:12:03,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:12:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1531729473, now seen corresponding path program 10 times [2024-02-20 12:12:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:12:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293993930] [2024-02-20 12:12:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:12:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:12:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:03,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:12:03,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293993930] [2024-02-20 12:12:03,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293993930] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:12:03,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640138081] [2024-02-20 12:12:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:12:03,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:12:03,769 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) [2024-02-20 12:12:03,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 12:12:03,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:12:03,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:12:03,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:12:03,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:12:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:03,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:12:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:04,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640138081] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:12:04,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:12:04,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-20 12:12:04,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361056451] [2024-02-20 12:12:04,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:12:04,015 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:12:04,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:12:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:12:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:12:04,047 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:12:04,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 3377 transitions, 120251 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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) [2024-02-20 12:12:04,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:04,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:12:04,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:12,049 INFO L124 PetriNetUnfolderBase]: 5298/9142 cut-off events. [2024-02-20 12:12:12,049 INFO L125 PetriNetUnfolderBase]: For 141800/142082 co-relation queries the response was YES. [2024-02-20 12:12:12,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158412 conditions, 9142 events. 5298/9142 cut-off events. For 141800/142082 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 60684 event pairs, 76 based on Foata normal form. 46/9160 useless extension candidates. Maximal degree in co-relation 157059. Up to 8276 conditions per place. [2024-02-20 12:12:12,182 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 2678 selfloop transitions, 248 changer transitions 535/3466 dead transitions. [2024-02-20 12:12:12,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 3466 transitions, 130347 flow [2024-02-20 12:12:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 12:12:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 12:12:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-02-20 12:12:12,184 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2024-02-20 12:12:12,185 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 275 predicate places. [2024-02-20 12:12:12,185 INFO L507 AbstractCegarLoop]: Abstraction has has 300 places, 3466 transitions, 130347 flow [2024-02-20 12:12:12,185 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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) [2024-02-20 12:12:12,185 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:12:12,193 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:12:12,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 12:12:12,406 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 12:12:12,406 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:12:12,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:12:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1524918639, now seen corresponding path program 11 times [2024-02-20 12:12:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:12:12,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837438584] [2024-02-20 12:12:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:12:12,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:12:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:12,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:12:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837438584] [2024-02-20 12:12:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837438584] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:12:12,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096428785] [2024-02-20 12:12:12,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:12:12,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:12:12,659 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) [2024-02-20 12:12:12,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 12:12:12,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:12:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:12:12,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:12:12,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:12:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:12,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:12:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:12,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096428785] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:12:12,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:12:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-02-20 12:12:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457950827] [2024-02-20 12:12:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:12:12,831 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:12:12,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:12:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:12:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:12:12,849 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:12:12,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 3466 transitions, 130347 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-02-20 12:12:12,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:12,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:12:12,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:20,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-20 12:12:29,620 INFO L124 PetriNetUnfolderBase]: 7388/12724 cut-off events. [2024-02-20 12:12:29,620 INFO L125 PetriNetUnfolderBase]: For 219986/220366 co-relation queries the response was YES. [2024-02-20 12:12:29,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232490 conditions, 12724 events. 7388/12724 cut-off events. For 219986/220366 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 88207 event pairs, 94 based on Foata normal form. 190/12883 useless extension candidates. Maximal degree in co-relation 231068. Up to 11586 conditions per place. [2024-02-20 12:12:29,791 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 3005 selfloop transitions, 1115 changer transitions 661/4786 dead transitions. [2024-02-20 12:12:29,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 4786 transitions, 189548 flow [2024-02-20 12:12:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-20 12:12:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-20 12:12:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 398 transitions. [2024-02-20 12:12:29,811 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45537757437070936 [2024-02-20 12:12:29,812 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 312 predicate places. [2024-02-20 12:12:29,812 INFO L507 AbstractCegarLoop]: Abstraction has has 337 places, 4786 transitions, 189548 flow [2024-02-20 12:12:29,812 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-02-20 12:12:29,812 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:12:29,812 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:12:29,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-20 12:12:30,025 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:30,026 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:12:30,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:12:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1082293875, now seen corresponding path program 12 times [2024-02-20 12:12:30,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:12:30,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245334303] [2024-02-20 12:12:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:12:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:12:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:30,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:12:30,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245334303] [2024-02-20 12:12:30,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245334303] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:12:30,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667854839] [2024-02-20 12:12:30,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:12:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:12:30,197 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) [2024-02-20 12:12:30,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 12:12:30,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:12:30,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:12:30,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:12:30,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:12:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:30,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:12:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667854839] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:12:30,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:12:30,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:12:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153432671] [2024-02-20 12:12:30,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:12:30,476 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:12:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:12:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:12:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:12:31,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-20 12:12:31,740 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:12:31,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 4786 transitions, 189548 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-02-20 12:12:31,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:31,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:12:31,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:55,026 INFO L124 PetriNetUnfolderBase]: 9569/16124 cut-off events. [2024-02-20 12:12:55,026 INFO L125 PetriNetUnfolderBase]: For 339402/340036 co-relation queries the response was YES. [2024-02-20 12:12:55,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307819 conditions, 16124 events. 9569/16124 cut-off events. For 339402/340036 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 112868 event pairs, 150 based on Foata normal form. 78/16123 useless extension candidates. Maximal degree in co-relation 306306. Up to 14620 conditions per place. [2024-02-20 12:12:55,255 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 3914 selfloop transitions, 1242 changer transitions 720/5881 dead transitions. [2024-02-20 12:12:55,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 5881 transitions, 244534 flow [2024-02-20 12:12:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 12:12:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 12:12:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 236 transitions. [2024-02-20 12:12:55,257 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.466403162055336 [2024-02-20 12:12:55,263 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 333 predicate places. [2024-02-20 12:12:55,263 INFO L507 AbstractCegarLoop]: Abstraction has has 358 places, 5881 transitions, 244534 flow [2024-02-20 12:12:55,263 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-02-20 12:12:55,263 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:12:55,263 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:12:55,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-20 12:12:55,475 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:55,476 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:12:55,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:12:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash 676455437, now seen corresponding path program 13 times [2024-02-20 12:12:55,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:12:55,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969955126] [2024-02-20 12:12:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:12:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:12:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:12:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969955126] [2024-02-20 12:12:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969955126] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:12:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510706949] [2024-02-20 12:12:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:12:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:12:55,665 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) [2024-02-20 12:12:55,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 12:12:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:55,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:12:55,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:12:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:55,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:12:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:55,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510706949] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:12:55,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:12:55,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-20 12:12:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219375132] [2024-02-20 12:12:55,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:12:55,908 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:12:55,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:12:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:12:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:12:55,916 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:12:55,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 5881 transitions, 244534 flow. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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) [2024-02-20 12:12:55,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:12:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:29,308 INFO L124 PetriNetUnfolderBase]: 10423/17475 cut-off events. [2024-02-20 12:13:29,308 INFO L125 PetriNetUnfolderBase]: For 410835/411549 co-relation queries the response was YES. [2024-02-20 12:13:29,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348830 conditions, 17475 events. 10423/17475 cut-off events. For 410835/411549 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 123302 event pairs, 170 based on Foata normal form. 86/17473 useless extension candidates. Maximal degree in co-relation 347247. Up to 15815 conditions per place. [2024-02-20 12:13:29,583 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 4692 selfloop transitions, 880 changer transitions 756/6333 dead transitions. [2024-02-20 12:13:29,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 6333 transitions, 275918 flow [2024-02-20 12:13:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 12:13:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 12:13:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 169 transitions. [2024-02-20 12:13:29,585 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48985507246376814 [2024-02-20 12:13:29,586 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 347 predicate places. [2024-02-20 12:13:29,586 INFO L507 AbstractCegarLoop]: Abstraction has has 372 places, 6333 transitions, 275918 flow [2024-02-20 12:13:29,586 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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) [2024-02-20 12:13:29,586 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:29,586 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:29,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:29,798 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:29,799 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:13:29,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1750946725, now seen corresponding path program 14 times [2024-02-20 12:13:29,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:29,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895643866] [2024-02-20 12:13:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:29,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:29,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:29,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895643866] [2024-02-20 12:13:29,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895643866] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:29,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656886305] [2024-02-20 12:13:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:13:29,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:29,931 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) [2024-02-20 12:13:29,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 12:13:30,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:13:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:13:30,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:13:30,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:30,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:30,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656886305] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:30,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:30,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-20 12:13:30,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487464613] [2024-02-20 12:13:30,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:30,177 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:13:30,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:30,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:13:30,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:13:30,188 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:13:30,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 6333 transitions, 275918 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 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) [2024-02-20 12:13:30,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:30,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:13:30,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:42,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-20 12:14:32,655 INFO L124 PetriNetUnfolderBase]: 15116/25173 cut-off events. [2024-02-20 12:14:32,656 INFO L125 PetriNetUnfolderBase]: For 697727/698886 co-relation queries the response was YES. [2024-02-20 12:14:32,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523618 conditions, 25173 events. 15116/25173 cut-off events. For 697727/698886 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 184355 event pairs, 332 based on Foata normal form. 329/25339 useless extension candidates. Maximal degree in co-relation 521965. Up to 22736 conditions per place. [2024-02-20 12:14:33,044 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 4828 selfloop transitions, 3052 changer transitions 959/8844 dead transitions. [2024-02-20 12:14:33,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 8844 transitions, 403063 flow [2024-02-20 12:14:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-20 12:14:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-20 12:14:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 331 transitions. [2024-02-20 12:14:33,046 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4642356241234222 [2024-02-20 12:14:33,046 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 377 predicate places. [2024-02-20 12:14:33,046 INFO L507 AbstractCegarLoop]: Abstraction has has 402 places, 8844 transitions, 403063 flow [2024-02-20 12:14:33,046 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 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) [2024-02-20 12:14:33,047 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:14:33,047 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:14:33,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-20 12:14:33,252 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:33,252 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:14:33,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:14:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2101094363, now seen corresponding path program 15 times [2024-02-20 12:14:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:14:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910511245] [2024-02-20 12:14:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:14:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:14:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:14:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:33,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:14:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910511245] [2024-02-20 12:14:33,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910511245] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:14:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971949403] [2024-02-20 12:14:33,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:14:33,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:33,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:14:33,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:14:33,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 12:14:33,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:14:33,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:14:33,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:14:33,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:14:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:33,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:14:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:33,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971949403] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:14:33,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:14:33,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:14:33,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987278760] [2024-02-20 12:14:33,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:14:33,541 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:14:33,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:14:33,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:14:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:14:33,557 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:14:33,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 8844 transitions, 403063 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-02-20 12:14:33,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:14:33,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:14:33,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:15:48,316 INFO L124 PetriNetUnfolderBase]: 15141/25253 cut-off events. [2024-02-20 12:15:48,316 INFO L125 PetriNetUnfolderBase]: For 746661/747833 co-relation queries the response was YES. [2024-02-20 12:15:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548748 conditions, 25253 events. 15141/25253 cut-off events. For 746661/747833 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 185455 event pairs, 322 based on Foata normal form. 168/25270 useless extension candidates. Maximal degree in co-relation 547025. Up to 22837 conditions per place. [2024-02-20 12:15:48,719 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 5456 selfloop transitions, 2450 changer transitions 977/8888 dead transitions. [2024-02-20 12:15:48,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 8888 transitions, 422843 flow [2024-02-20 12:15:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 12:15:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 12:15:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 214 transitions. [2024-02-20 12:15:48,720 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2024-02-20 12:15:48,721 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 396 predicate places. [2024-02-20 12:15:48,721 INFO L507 AbstractCegarLoop]: Abstraction has has 421 places, 8888 transitions, 422843 flow [2024-02-20 12:15:48,721 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-02-20 12:15:48,722 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:15:48,722 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:15:48,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-20 12:15:48,934 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:15:48,935 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:15:49,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:15:49,101 INFO L85 PathProgramCache]: Analyzing trace with hash -13405580, now seen corresponding path program 16 times [2024-02-20 12:15:49,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:15:49,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390446311] [2024-02-20 12:15:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:15:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:15:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:15:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:15:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:15:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390446311] [2024-02-20 12:15:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390446311] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:15:49,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742281142] [2024-02-20 12:15:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:15:49,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:15:49,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:15:49,202 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:15:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-20 12:15:49,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:15:49,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:15:49,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-20 12:15:49,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:15:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:15:49,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:15:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:15:49,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742281142] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:15:49,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:15:49,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-02-20 12:15:49,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447688103] [2024-02-20 12:15:49,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:15:49,370 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-20 12:15:49,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:15:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-20 12:15:49,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-20 12:15:49,373 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-20 12:15:49,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 8888 transitions, 422843 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 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) [2024-02-20 12:15:49,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:15:49,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-20 12:15:49,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:18:26,209 INFO L124 PetriNetUnfolderBase]: 25230/42064 cut-off events. [2024-02-20 12:18:26,210 INFO L125 PetriNetUnfolderBase]: For 1078915/1082653 co-relation queries the response was YES. [2024-02-20 12:18:26,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941680 conditions, 42064 events. 25230/42064 cut-off events. For 1078915/1082653 co-relation queries the response was YES. Maximal size of possible extension queue 1347. Compared 336150 event pairs, 202 based on Foata normal form. 1248/43222 useless extension candidates. Maximal degree in co-relation 939519. Up to 37784 conditions per place. [2024-02-20 12:18:27,376 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 10624 selfloop transitions, 863 changer transitions 1696/14410 dead transitions. [2024-02-20 12:18:27,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 14410 transitions, 715059 flow [2024-02-20 12:18:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:18:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:18:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-02-20 12:18:27,378 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7739130434782608 [2024-02-20 12:18:27,378 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 400 predicate places. [2024-02-20 12:18:27,378 INFO L507 AbstractCegarLoop]: Abstraction has has 425 places, 14410 transitions, 715059 flow [2024-02-20 12:18:27,379 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 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) [2024-02-20 12:18:27,379 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:18:27,379 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:18:27,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-20 12:18:27,593 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:18:27,593 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:18:27,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:18:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash -63220930, now seen corresponding path program 17 times [2024-02-20 12:18:27,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:18:27,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41037037] [2024-02-20 12:18:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:18:27,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:18:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:18:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:18:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41037037] [2024-02-20 12:18:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41037037] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:18:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167646216] [2024-02-20 12:18:27,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:18:27,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:18:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:18:27,837 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:18:27,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-20 12:18:27,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:18:27,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:18:27,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-20 12:18:27,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:18:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:28,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:18:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167646216] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:18:28,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:18:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-02-20 12:18:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289957922] [2024-02-20 12:18:28,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:18:28,378 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 12:18:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:18:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 12:18:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-02-20 12:18:28,407 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:18:28,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 14410 transitions, 715059 flow. Second operand has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 22 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:18:28,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:18:28,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:18:28,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:25:00,244 INFO L124 PetriNetUnfolderBase]: 29035/48626 cut-off events. [2024-02-20 12:25:00,244 INFO L125 PetriNetUnfolderBase]: For 1395292/1398912 co-relation queries the response was YES. [2024-02-20 12:25:00,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135948 conditions, 48626 events. 29035/48626 cut-off events. For 1395292/1398912 co-relation queries the response was YES. Maximal size of possible extension queue 1590. Compared 400551 event pairs, 260 based on Foata normal form. 638/49131 useless extension candidates. Maximal degree in co-relation 1133489. Up to 43848 conditions per place. [2024-02-20 12:25:01,407 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 8444 selfloop transitions, 6724 changer transitions 1919/17095 dead transitions. [2024-02-20 12:25:01,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 17095 transitions, 881752 flow [2024-02-20 12:25:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-20 12:25:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-20 12:25:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 478 transitions. [2024-02-20 12:25:01,416 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4329710144927536 [2024-02-20 12:25:01,416 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 447 predicate places. [2024-02-20 12:25:01,417 INFO L507 AbstractCegarLoop]: Abstraction has has 472 places, 17095 transitions, 881752 flow [2024-02-20 12:25:01,417 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 22 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:25:01,417 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:25:01,417 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:25:01,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-20 12:25:01,618 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-20 12:25:01,618 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:25:01,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:25:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1016921956, now seen corresponding path program 18 times [2024-02-20 12:25:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:25:01,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730551469] [2024-02-20 12:25:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:25:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:25:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:25:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:25:01,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:25:01,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730551469] [2024-02-20 12:25:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730551469] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:25:01,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415672035] [2024-02-20 12:25:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:25:01,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:25:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:25:01,851 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:25:01,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-20 12:25:02,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-02-20 12:25:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:25:02,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-20 12:25:02,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:25:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:25:02,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:25:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:25:02,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415672035] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:25:02,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:25:02,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-02-20 12:25:02,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000609052] [2024-02-20 12:25:02,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:25:02,355 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 12:25:02,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:25:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 12:25:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2024-02-20 12:25:02,388 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:25:02,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 17095 transitions, 881752 flow. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 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) [2024-02-20 12:25:02,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:25:02,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:25:02,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15