./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 273a578a 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-273a578-m [2024-02-19 14:51:52,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:51:52,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:51:52,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:51:52,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:51:52,374 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:51:52,375 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:51:52,375 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:51:52,376 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:51:52,379 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:51:52,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:51:52,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:51:52,380 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:51:52,381 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:51:52,381 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:51:52,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:51:52,381 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:51:52,381 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:51:52,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:51:52,382 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:51:52,382 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:51:52,383 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:51:52,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:51:52,383 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:51:52,383 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:51:52,383 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:51:52,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:51:52,384 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:51:52,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:51:52,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:51:52,385 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:51:52,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:51:52,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:51:52,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:51:52,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:51:52,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:51:52,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:51:52,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:51:52,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:51:52,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:51:52,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:51:52,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:51:52,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:51:52,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:51:52,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:51:52,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:51:52,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:51:52,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:51:52,661 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:51:52,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-19 14:51:54,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:51:54,267 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:51:54,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-19 14:51:54,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eac0dfde/568a5087d2cd4b1a9584b5b879599ebf/FLAG1d5171f6b [2024-02-19 14:51:54,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eac0dfde/568a5087d2cd4b1a9584b5b879599ebf [2024-02-19 14:51:54,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:51:54,296 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:51:54,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:51:54,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:51:54,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:51:54,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707775db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54, skipping insertion in model container [2024-02-19 14:51:54,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:51:54,469 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] [2024-02-19 14:51:54,472 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:51:54,481 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:51:54,501 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] [2024-02-19 14:51:54,506 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:51:54,518 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:51:54,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54 WrapperNode [2024-02-19 14:51:54,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:51:54,521 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:51:54,521 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:51:54,521 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:51:54,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,554 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-02-19 14:51:54,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:51:54,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:51:54,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:51:54,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:51:54,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,592 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]. [2024-02-19 14:51:54,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,604 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,608 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:51:54,614 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:51:54,614 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:51:54,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:51:54,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (1/1) ... [2024-02-19 14:51:54,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:51:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:54,650 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) [2024-02-19 14:51:54,664 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 [2024-02-19 14:51:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:51:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:51:54,699 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:51:54,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:51:54,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:51:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:51:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:51:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:51:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:51:54,702 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:51:54,772 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:51:54,774 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:51:54,956 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:51:54,956 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:51:55,041 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:51:55,041 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-19 14:51:55,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:51:55 BoogieIcfgContainer [2024-02-19 14:51:55,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:51:55,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:51:55,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:51:55,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:51:55,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:51:54" (1/3) ... [2024-02-19 14:51:55,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2f5bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:51:55, skipping insertion in model container [2024-02-19 14:51:55,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:51:54" (2/3) ... [2024-02-19 14:51:55,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2f5bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:51:55, skipping insertion in model container [2024-02-19 14:51:55,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:51:55" (3/3) ... [2024-02-19 14:51:55,067 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-02-19 14:51:55,080 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:51:55,080 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:51:55,081 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:51:55,132 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 14:51:55,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-02-19 14:51:55,190 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-02-19 14:51:55,191 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:51:55,194 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. [2024-02-19 14:51:55,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-02-19 14:51:55,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-02-19 14:51:55,208 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:51:55,215 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;@5622b22f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:51:55,216 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:51:55,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:51:55,226 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-19 14:51:55,227 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:51:55,227 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:55,228 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:55,228 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:55,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1306973434, now seen corresponding path program 1 times [2024-02-19 14:51:55,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:55,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929128593] [2024-02-19 14:51:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:55,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929128593] [2024-02-19 14:51:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929128593] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:51:55,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:51:55,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:51:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299586874] [2024-02-19 14:51:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:51:55,556 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:51:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:51:55,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:51:55,582 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-19 14:51:55,584 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) [2024-02-19 14:51:55,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:55,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-19 14:51:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:55,669 INFO L124 PetriNetUnfolderBase]: 73/151 cut-off events. [2024-02-19 14:51:55,670 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-19 14:51:55,671 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. [2024-02-19 14:51:55,672 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 18 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2024-02-19 14:51:55,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 127 flow [2024-02-19 14:51:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:51:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:51:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-02-19 14:51:55,684 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-02-19 14:51:55,687 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2024-02-19 14:51:55,687 INFO L507 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 127 flow [2024-02-19 14:51:55,687 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) [2024-02-19 14:51:55,687 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:55,687 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:55,687 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:51:55,687 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:55,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1187982182, now seen corresponding path program 1 times [2024-02-19 14:51:55,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:55,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393929330] [2024-02-19 14:51:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393929330] [2024-02-19 14:51:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393929330] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:51:55,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:51:55,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:51:55,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654676696] [2024-02-19 14:51:55,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:51:55,824 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:51:55,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:55,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:51:55,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:51:55,827 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:55,828 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) [2024-02-19 14:51:55,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:55,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:55,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:55,934 INFO L124 PetriNetUnfolderBase]: 179/333 cut-off events. [2024-02-19 14:51:55,934 INFO L125 PetriNetUnfolderBase]: For 114/116 co-relation queries the response was YES. [2024-02-19 14:51:55,937 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. [2024-02-19 14:51:55,938 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 38 selfloop transitions, 4 changer transitions 13/58 dead transitions. [2024-02-19 14:51:55,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 58 transitions, 360 flow [2024-02-19 14:51:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:51:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:51:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-02-19 14:51:55,940 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-02-19 14:51:55,940 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2024-02-19 14:51:55,940 INFO L507 AbstractCegarLoop]: Abstraction has has 31 places, 58 transitions, 360 flow [2024-02-19 14:51:55,941 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) [2024-02-19 14:51:55,941 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:55,941 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:55,941 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:51:55,941 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:55,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1656710680, now seen corresponding path program 2 times [2024-02-19 14:51:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:55,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122225180] [2024-02-19 14:51:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:55,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:56,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122225180] [2024-02-19 14:51:56,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122225180] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:51:56,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:51:56,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:51:56,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328313079] [2024-02-19 14:51:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:51:56,081 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:51:56,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:51:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:51:56,094 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:56,094 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) [2024-02-19 14:51:56,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:56,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:56,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:56,179 INFO L124 PetriNetUnfolderBase]: 224/406 cut-off events. [2024-02-19 14:51:56,179 INFO L125 PetriNetUnfolderBase]: For 227/243 co-relation queries the response was YES. [2024-02-19 14:51:56,181 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. [2024-02-19 14:51:56,184 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 67 selfloop transitions, 11 changer transitions 17/98 dead transitions. [2024-02-19 14:51:56,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 98 transitions, 781 flow [2024-02-19 14:51:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:51:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:51:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-02-19 14:51:56,187 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-02-19 14:51:56,189 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-02-19 14:51:56,189 INFO L507 AbstractCegarLoop]: Abstraction has has 35 places, 98 transitions, 781 flow [2024-02-19 14:51:56,189 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) [2024-02-19 14:51:56,189 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:56,190 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:56,190 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:51:56,190 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:56,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1936776188, now seen corresponding path program 3 times [2024-02-19 14:51:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:56,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106249279] [2024-02-19 14:51:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:56,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:56,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106249279] [2024-02-19 14:51:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106249279] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160532296] [2024-02-19 14:51:56,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:51:56,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:56,341 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) [2024-02-19 14:51:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:51:56,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:51:56,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:51:56,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:51:56,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:56,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:56,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160532296] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:56,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-19 14:51:56,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-02-19 14:51:56,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782365617] [2024-02-19 14:51:56,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:51:56,517 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:51:56,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:51:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:51:56,521 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-02-19 14:51:56,523 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) [2024-02-19 14:51:56,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:56,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-02-19 14:51:56,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:56,611 INFO L124 PetriNetUnfolderBase]: 235/427 cut-off events. [2024-02-19 14:51:56,611 INFO L125 PetriNetUnfolderBase]: For 363/369 co-relation queries the response was YES. [2024-02-19 14:51:56,612 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. [2024-02-19 14:51:56,614 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 84 selfloop transitions, 15 changer transitions 20/124 dead transitions. [2024-02-19 14:51:56,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 124 transitions, 1222 flow [2024-02-19 14:51:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:51:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:51:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-02-19 14:51:56,616 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-02-19 14:51:56,617 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2024-02-19 14:51:56,617 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 124 transitions, 1222 flow [2024-02-19 14:51:56,617 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) [2024-02-19 14:51:56,617 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:56,618 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:56,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-19 14:51:56,828 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 [2024-02-19 14:51:56,829 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:56,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash 233029576, now seen corresponding path program 4 times [2024-02-19 14:51:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:56,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60352154] [2024-02-19 14:51:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:56,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:56,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:56,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60352154] [2024-02-19 14:51:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60352154] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:51:56,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:51:56,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:51:56,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098519459] [2024-02-19 14:51:56,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:51:56,934 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:51:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:51:56,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:51:56,941 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:56,941 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) [2024-02-19 14:51:56,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:56,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:56,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:57,006 INFO L124 PetriNetUnfolderBase]: 253/460 cut-off events. [2024-02-19 14:51:57,007 INFO L125 PetriNetUnfolderBase]: For 666/672 co-relation queries the response was YES. [2024-02-19 14:51:57,007 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. [2024-02-19 14:51:57,010 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 99 selfloop transitions, 18 changer transitions 22/142 dead transitions. [2024-02-19 14:51:57,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 142 transitions, 1672 flow [2024-02-19 14:51:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:51:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:51:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-02-19 14:51:57,011 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-02-19 14:51:57,011 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2024-02-19 14:51:57,011 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 142 transitions, 1672 flow [2024-02-19 14:51:57,012 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) [2024-02-19 14:51:57,012 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:57,012 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:57,012 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:51:57,012 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:57,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash -840967356, now seen corresponding path program 5 times [2024-02-19 14:51:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:57,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159982594] [2024-02-19 14:51:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159982594] [2024-02-19 14:51:57,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159982594] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921238629] [2024-02-19 14:51:57,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:51:57,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:57,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:57,098 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) [2024-02-19 14:51:57,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:51:57,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:51:57,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:51:57,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:51:57,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:57,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921238629] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:51:57,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:51:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-02-19 14:51:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304887725] [2024-02-19 14:51:57,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:51:57,233 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 14:51:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 14:51:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-02-19 14:51:57,244 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:57,244 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) [2024-02-19 14:51:57,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:57,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:57,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:57,436 INFO L124 PetriNetUnfolderBase]: 353/642 cut-off events. [2024-02-19 14:51:57,436 INFO L125 PetriNetUnfolderBase]: For 1380/1386 co-relation queries the response was YES. [2024-02-19 14:51:57,437 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. [2024-02-19 14:51:57,441 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 116 selfloop transitions, 40 changer transitions 29/188 dead transitions. [2024-02-19 14:51:57,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 188 transitions, 2591 flow [2024-02-19 14:51:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:51:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:51:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-02-19 14:51:57,444 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-02-19 14:51:57,445 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2024-02-19 14:51:57,446 INFO L507 AbstractCegarLoop]: Abstraction has has 51 places, 188 transitions, 2591 flow [2024-02-19 14:51:57,446 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) [2024-02-19 14:51:57,446 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:57,446 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:57,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:51:57,660 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 [2024-02-19 14:51:57,660 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:57,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:57,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1273265374, now seen corresponding path program 6 times [2024-02-19 14:51:57,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:57,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34946770] [2024-02-19 14:51:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:57,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:57,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34946770] [2024-02-19 14:51:57,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34946770] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:51:57,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:51:57,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:51:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009850194] [2024-02-19 14:51:57,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:51:57,733 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:51:57,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:51:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:51:57,740 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:57,740 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) [2024-02-19 14:51:57,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:57,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:57,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:57,837 INFO L124 PetriNetUnfolderBase]: 348/632 cut-off events. [2024-02-19 14:51:57,837 INFO L125 PetriNetUnfolderBase]: For 1696/1702 co-relation queries the response was YES. [2024-02-19 14:51:57,838 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. [2024-02-19 14:51:57,841 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 133 selfloop transitions, 18 changer transitions 29/183 dead transitions. [2024-02-19 14:51:57,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 183 transitions, 2881 flow [2024-02-19 14:51:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:51:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:51:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-02-19 14:51:57,842 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-02-19 14:51:57,843 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-02-19 14:51:57,843 INFO L507 AbstractCegarLoop]: Abstraction has has 55 places, 183 transitions, 2881 flow [2024-02-19 14:51:57,843 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) [2024-02-19 14:51:57,843 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:57,843 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:57,843 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-19 14:51:57,844 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:57,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash 199268442, now seen corresponding path program 7 times [2024-02-19 14:51:57,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:57,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159692443] [2024-02-19 14:51:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:57,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:57,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159692443] [2024-02-19 14:51:57,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159692443] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:57,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696458101] [2024-02-19 14:51:57,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:51:57,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:57,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:57,929 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) [2024-02-19 14:51:57,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:51:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:57,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:51:57,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:58,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:58,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696458101] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:51:58,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:51:58,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-02-19 14:51:58,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590076386] [2024-02-19 14:51:58,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:51:58,046 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:51:58,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:51:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:51:58,054 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:58,055 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) [2024-02-19 14:51:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:58,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:58,202 INFO L124 PetriNetUnfolderBase]: 344/621 cut-off events. [2024-02-19 14:51:58,203 INFO L125 PetriNetUnfolderBase]: For 2171/2177 co-relation queries the response was YES. [2024-02-19 14:51:58,203 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. [2024-02-19 14:51:58,208 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 121 selfloop transitions, 28 changer transitions 29/181 dead transitions. [2024-02-19 14:51:58,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 181 transitions, 3198 flow [2024-02-19 14:51:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 14:51:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 14:51:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-02-19 14:51:58,210 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.515527950310559 [2024-02-19 14:51:58,212 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2024-02-19 14:51:58,212 INFO L507 AbstractCegarLoop]: Abstraction has has 61 places, 181 transitions, 3198 flow [2024-02-19 14:51:58,213 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) [2024-02-19 14:51:58,213 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:58,213 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] [2024-02-19 14:51:58,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:51:58,423 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 [2024-02-19 14:51:58,424 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:58,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash 169735477, now seen corresponding path program 1 times [2024-02-19 14:51:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009213754] [2024-02-19 14:51:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:58,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009213754] [2024-02-19 14:51:58,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009213754] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:58,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634417917] [2024-02-19 14:51:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:58,496 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) [2024-02-19 14:51:58,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:51:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:58,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:51:58,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:51:58,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:51:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634417917] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:51:58,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:51:58,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-02-19 14:51:58,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984230301] [2024-02-19 14:51:58,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:51:58,595 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:51:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:51:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:51:58,596 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-19 14:51:58,596 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) [2024-02-19 14:51:58,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:58,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-19 14:51:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:58,725 INFO L124 PetriNetUnfolderBase]: 587/1059 cut-off events. [2024-02-19 14:51:58,726 INFO L125 PetriNetUnfolderBase]: For 2614/2668 co-relation queries the response was YES. [2024-02-19 14:51:58,728 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. [2024-02-19 14:51:58,736 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 160 selfloop transitions, 11 changer transitions 60/270 dead transitions. [2024-02-19 14:51:58,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 270 transitions, 5281 flow [2024-02-19 14:51:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:51:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:51:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-19 14:51:58,738 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-19 14:51:58,738 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2024-02-19 14:51:58,738 INFO L507 AbstractCegarLoop]: Abstraction has has 64 places, 270 transitions, 5281 flow [2024-02-19 14:51:58,739 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) [2024-02-19 14:51:58,739 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:58,739 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] [2024-02-19 14:51:58,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-19 14:51:58,950 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 [2024-02-19 14:51:58,951 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:58,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 442871043, now seen corresponding path program 2 times [2024-02-19 14:51:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405156194] [2024-02-19 14:51:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:59,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405156194] [2024-02-19 14:51:59,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405156194] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:59,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600976480] [2024-02-19 14:51:59,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:51:59,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:59,082 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) [2024-02-19 14:51:59,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:51:59,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:51:59,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:51:59,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:51:59,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:59,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:51:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600976480] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:51:59,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:51:59,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-19 14:51:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976121449] [2024-02-19 14:51:59,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:51:59,220 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 14:51:59,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 14:51:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:51:59,225 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:51:59,226 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) [2024-02-19 14:51:59,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:59,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:51:59,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:59,776 INFO L124 PetriNetUnfolderBase]: 991/1714 cut-off events. [2024-02-19 14:51:59,776 INFO L125 PetriNetUnfolderBase]: For 6240/6339 co-relation queries the response was YES. [2024-02-19 14:51:59,778 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. [2024-02-19 14:51:59,793 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 289 selfloop transitions, 196 changer transitions 127/617 dead transitions. [2024-02-19 14:51:59,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 617 transitions, 13242 flow [2024-02-19 14:51:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 14:51:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 14:51:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 243 transitions. [2024-02-19 14:51:59,795 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45935727788279773 [2024-02-19 14:51:59,796 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2024-02-19 14:51:59,796 INFO L507 AbstractCegarLoop]: Abstraction has has 86 places, 617 transitions, 13242 flow [2024-02-19 14:51:59,796 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) [2024-02-19 14:51:59,796 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:59,796 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] [2024-02-19 14:51:59,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:00,000 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 [2024-02-19 14:52:00,001 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:00,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash -763733189, now seen corresponding path program 3 times [2024-02-19 14:52:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:00,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998732292] [2024-02-19 14:52:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:00,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:00,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998732292] [2024-02-19 14:52:00,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998732292] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:00,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079049809] [2024-02-19 14:52:00,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:52:00,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:00,129 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) [2024-02-19 14:52:00,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:52:00,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-19 14:52:00,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:00,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:00,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:00,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:00,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079049809] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:00,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:00,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 14:52:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902136454] [2024-02-19 14:52:00,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:00,309 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 14:52:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 14:52:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-02-19 14:52:00,323 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:00,323 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) [2024-02-19 14:52:00,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:00,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:00,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:01,277 INFO L124 PetriNetUnfolderBase]: 1557/2591 cut-off events. [2024-02-19 14:52:01,277 INFO L125 PetriNetUnfolderBase]: For 12733/12849 co-relation queries the response was YES. [2024-02-19 14:52:01,280 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. [2024-02-19 14:52:01,301 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 458 selfloop transitions, 265 changer transitions 167/895 dead transitions. [2024-02-19 14:52:01,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 895 transitions, 21017 flow [2024-02-19 14:52:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 14:52:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 14:52:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 304 transitions. [2024-02-19 14:52:01,303 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4720496894409938 [2024-02-19 14:52:01,304 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 88 predicate places. [2024-02-19 14:52:01,304 INFO L507 AbstractCegarLoop]: Abstraction has has 113 places, 895 transitions, 21017 flow [2024-02-19 14:52:01,304 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) [2024-02-19 14:52:01,304 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:01,304 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] [2024-02-19 14:52:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:01,517 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 [2024-02-19 14:52:01,518 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:01,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1452096957, now seen corresponding path program 4 times [2024-02-19 14:52:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179275646] [2024-02-19 14:52:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:01,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:01,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179275646] [2024-02-19 14:52:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179275646] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335408639] [2024-02-19 14:52:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:52:01,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:01,657 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) [2024-02-19 14:52:01,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 14:52:01,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:52:01,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:01,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:01,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:01,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:01,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335408639] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:01,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:01,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 14:52:01,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467610660] [2024-02-19 14:52:01,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:01,847 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 14:52:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 14:52:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-02-19 14:52:01,859 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:01,860 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) [2024-02-19 14:52:01,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:01,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:01,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:03,096 INFO L124 PetriNetUnfolderBase]: 2260/3767 cut-off events. [2024-02-19 14:52:03,096 INFO L125 PetriNetUnfolderBase]: For 22725/22895 co-relation queries the response was YES. [2024-02-19 14:52:03,101 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. [2024-02-19 14:52:03,135 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 627 selfloop transitions, 473 changer transitions 215/1320 dead transitions. [2024-02-19 14:52:03,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 1320 transitions, 33690 flow [2024-02-19 14:52:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-19 14:52:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-19 14:52:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 345 transitions. [2024-02-19 14:52:03,137 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-02-19 14:52:03,137 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 120 predicate places. [2024-02-19 14:52:03,138 INFO L507 AbstractCegarLoop]: Abstraction has has 145 places, 1320 transitions, 33690 flow [2024-02-19 14:52:03,138 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) [2024-02-19 14:52:03,138 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:03,138 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] [2024-02-19 14:52:03,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:03,351 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 [2024-02-19 14:52:03,351 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:03,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1839444345, now seen corresponding path program 5 times [2024-02-19 14:52:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68527916] [2024-02-19 14:52:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:03,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68527916] [2024-02-19 14:52:03,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68527916] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456193375] [2024-02-19 14:52:03,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:52:03,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:03,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:03,501 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) [2024-02-19 14:52:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 14:52:03,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:52:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:03,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 14:52:03,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:03,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:03,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456193375] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:03,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:03,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-02-19 14:52:03,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662538880] [2024-02-19 14:52:03,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:03,733 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:52:03,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:52:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:52:03,741 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:03,741 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) [2024-02-19 14:52:03,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:03,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:03,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:05,822 INFO L124 PetriNetUnfolderBase]: 2813/4815 cut-off events. [2024-02-19 14:52:05,822 INFO L125 PetriNetUnfolderBase]: For 34018/34200 co-relation queries the response was YES. [2024-02-19 14:52:05,828 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. [2024-02-19 14:52:05,876 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 879 selfloop transitions, 630 changer transitions 346/1860 dead transitions. [2024-02-19 14:52:05,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1860 transitions, 51375 flow [2024-02-19 14:52:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-19 14:52:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-19 14:52:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 353 transitions. [2024-02-19 14:52:05,878 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41480611045828436 [2024-02-19 14:52:05,879 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 156 predicate places. [2024-02-19 14:52:05,879 INFO L507 AbstractCegarLoop]: Abstraction has has 181 places, 1860 transitions, 51375 flow [2024-02-19 14:52:05,879 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) [2024-02-19 14:52:05,879 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:05,879 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] [2024-02-19 14:52:05,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:06,092 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 [2024-02-19 14:52:06,092 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:06,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash -330987363, now seen corresponding path program 6 times [2024-02-19 14:52:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:06,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023350014] [2024-02-19 14:52:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:06,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:06,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023350014] [2024-02-19 14:52:06,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023350014] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:06,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537790409] [2024-02-19 14:52:06,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:52:06,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:06,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:06,224 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) [2024-02-19 14:52:06,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 14:52:06,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:52:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:06,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:06,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:06,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537790409] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:06,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:52:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025146838] [2024-02-19 14:52:06,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:06,409 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:52:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:52:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:52:06,424 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:06,425 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) [2024-02-19 14:52:06,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:06,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:06,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:08,508 INFO L124 PetriNetUnfolderBase]: 2941/5041 cut-off events. [2024-02-19 14:52:08,508 INFO L125 PetriNetUnfolderBase]: For 43944/44136 co-relation queries the response was YES. [2024-02-19 14:52:08,516 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. [2024-02-19 14:52:08,555 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1252 selfloop transitions, 327 changer transitions 359/1943 dead transitions. [2024-02-19 14:52:08,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 1943 transitions, 57527 flow [2024-02-19 14:52:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:52:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:52:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 203 transitions. [2024-02-19 14:52:08,556 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44130434782608696 [2024-02-19 14:52:08,557 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 175 predicate places. [2024-02-19 14:52:08,557 INFO L507 AbstractCegarLoop]: Abstraction has has 200 places, 1943 transitions, 57527 flow [2024-02-19 14:52:08,557 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) [2024-02-19 14:52:08,557 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:08,557 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] [2024-02-19 14:52:08,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:08,768 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 [2024-02-19 14:52:08,769 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:08,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2044148415, now seen corresponding path program 7 times [2024-02-19 14:52:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:08,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695937106] [2024-02-19 14:52:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:08,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695937106] [2024-02-19 14:52:08,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695937106] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791856783] [2024-02-19 14:52:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:52:08,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:08,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:08,891 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) [2024-02-19 14:52:08,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 14:52:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:08,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:08,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:09,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791856783] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:09,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:09,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:52:09,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53632248] [2024-02-19 14:52:09,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:09,087 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:52:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:09,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:52:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:52:09,097 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:09,097 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) [2024-02-19 14:52:09,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:09,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:09,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:12,354 INFO L124 PetriNetUnfolderBase]: 4296/7376 cut-off events. [2024-02-19 14:52:12,354 INFO L125 PetriNetUnfolderBase]: For 78114/78393 co-relation queries the response was YES. [2024-02-19 14:52:12,365 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. [2024-02-19 14:52:12,444 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1485 selfloop transitions, 879 changer transitions 431/2800 dead transitions. [2024-02-19 14:52:12,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 2800 transitions, 88471 flow [2024-02-19 14:52:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-02-19 14:52:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-02-19 14:52:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 445 transitions. [2024-02-19 14:52:12,448 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4499494438827098 [2024-02-19 14:52:12,449 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 217 predicate places. [2024-02-19 14:52:12,449 INFO L507 AbstractCegarLoop]: Abstraction has has 242 places, 2800 transitions, 88471 flow [2024-02-19 14:52:12,450 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) [2024-02-19 14:52:12,450 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:12,450 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] [2024-02-19 14:52:12,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:12,661 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 [2024-02-19 14:52:12,661 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:12,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1102807077, now seen corresponding path program 8 times [2024-02-19 14:52:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:12,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447325562] [2024-02-19 14:52:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:12,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:12,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447325562] [2024-02-19 14:52:12,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447325562] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:12,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344495779] [2024-02-19 14:52:12,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:52:12,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:12,758 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) [2024-02-19 14:52:12,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 14:52:12,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:52:12,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:12,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:12,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:12,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344495779] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:12,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:12,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-19 14:52:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292713787] [2024-02-19 14:52:12,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:12,916 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-19 14:52:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-19 14:52:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-02-19 14:52:12,919 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:12,920 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) [2024-02-19 14:52:12,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:12,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:12,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:17,599 INFO L124 PetriNetUnfolderBase]: 5212/8970 cut-off events. [2024-02-19 14:52:17,599 INFO L125 PetriNetUnfolderBase]: For 107985/108311 co-relation queries the response was YES. [2024-02-19 14:52:17,610 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. [2024-02-19 14:52:17,694 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1701 selfloop transitions, 1158 changer transitions 506/3370 dead transitions. [2024-02-19 14:52:17,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 3370 transitions, 113265 flow [2024-02-19 14:52:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 14:52:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 14:52:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 295 transitions. [2024-02-19 14:52:17,699 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4580745341614907 [2024-02-19 14:52:17,700 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 244 predicate places. [2024-02-19 14:52:17,700 INFO L507 AbstractCegarLoop]: Abstraction has has 269 places, 3370 transitions, 113265 flow [2024-02-19 14:52:17,700 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) [2024-02-19 14:52:17,700 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:17,700 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] [2024-02-19 14:52:17,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-02-19 14:52:17,901 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 [2024-02-19 14:52:17,901 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:17,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2116449063, now seen corresponding path program 9 times [2024-02-19 14:52:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:17,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763738492] [2024-02-19 14:52:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:17,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:17,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763738492] [2024-02-19 14:52:17,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763738492] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:17,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122398845] [2024-02-19 14:52:17,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:52:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:17,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:17,995 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) [2024-02-19 14:52:17,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 14:52:18,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:52:18,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:18,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:18,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:18,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122398845] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:18,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:18,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:52:18,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596206730] [2024-02-19 14:52:18,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:18,167 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:52:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:52:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:52:18,184 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:18,185 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) [2024-02-19 14:52:18,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:18,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:18,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:23,750 INFO L124 PetriNetUnfolderBase]: 5212/8977 cut-off events. [2024-02-19 14:52:23,750 INFO L125 PetriNetUnfolderBase]: For 122124/122431 co-relation queries the response was YES. [2024-02-19 14:52:23,763 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. [2024-02-19 14:52:23,864 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 2107 selfloop transitions, 750 changer transitions 515/3377 dead transitions. [2024-02-19 14:52:23,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 3377 transitions, 120251 flow [2024-02-19 14:52:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 14:52:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 14:52:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 191 transitions. [2024-02-19 14:52:23,865 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4884910485933504 [2024-02-19 14:52:23,865 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 260 predicate places. [2024-02-19 14:52:23,866 INFO L507 AbstractCegarLoop]: Abstraction has has 285 places, 3377 transitions, 120251 flow [2024-02-19 14:52:23,866 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) [2024-02-19 14:52:23,866 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:23,866 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] [2024-02-19 14:52:23,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:24,066 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 [2024-02-19 14:52:24,067 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:24,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1531729473, now seen corresponding path program 10 times [2024-02-19 14:52:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121119168] [2024-02-19 14:52:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:24,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121119168] [2024-02-19 14:52:24,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121119168] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241498124] [2024-02-19 14:52:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:52:24,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:24,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:24,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:52:24,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 14:52:24,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:52:24,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:24,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:24,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:24,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:24,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241498124] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:24,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:24,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-19 14:52:24,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992553044] [2024-02-19 14:52:24,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:24,331 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:52:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:24,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:52:24,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:52:24,364 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:24,364 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) [2024-02-19 14:52:24,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:24,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:24,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:30,142 INFO L124 PetriNetUnfolderBase]: 5298/9142 cut-off events. [2024-02-19 14:52:30,142 INFO L125 PetriNetUnfolderBase]: For 141800/142082 co-relation queries the response was YES. [2024-02-19 14:52:30,152 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. [2024-02-19 14:52:30,227 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 2678 selfloop transitions, 248 changer transitions 535/3466 dead transitions. [2024-02-19 14:52:30,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 3466 transitions, 130347 flow [2024-02-19 14:52:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:52:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:52:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-02-19 14:52:30,228 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2024-02-19 14:52:30,228 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 275 predicate places. [2024-02-19 14:52:30,229 INFO L507 AbstractCegarLoop]: Abstraction has has 300 places, 3466 transitions, 130347 flow [2024-02-19 14:52:30,229 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) [2024-02-19 14:52:30,229 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:30,229 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] [2024-02-19 14:52:30,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:30,439 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 [2024-02-19 14:52:30,439 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:30,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1524918639, now seen corresponding path program 11 times [2024-02-19 14:52:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95185234] [2024-02-19 14:52:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:30,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95185234] [2024-02-19 14:52:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95185234] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062169980] [2024-02-19 14:52:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:52:30,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:30,544 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) [2024-02-19 14:52:30,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 14:52:30,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:52:30,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:30,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:30,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:30,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062169980] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:30,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-02-19 14:52:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619468214] [2024-02-19 14:52:30,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:30,710 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:52:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:52:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:52:30,727 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:30,728 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) [2024-02-19 14:52:30,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:30,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:30,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:37,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-19 14:52:44,386 INFO L124 PetriNetUnfolderBase]: 7388/12724 cut-off events. [2024-02-19 14:52:44,386 INFO L125 PetriNetUnfolderBase]: For 219986/220366 co-relation queries the response was YES. [2024-02-19 14:52:44,405 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. [2024-02-19 14:52:44,557 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 3005 selfloop transitions, 1115 changer transitions 661/4786 dead transitions. [2024-02-19 14:52:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 4786 transitions, 189548 flow [2024-02-19 14:52:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-19 14:52:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-19 14:52:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 398 transitions. [2024-02-19 14:52:44,558 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45537757437070936 [2024-02-19 14:52:44,559 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 312 predicate places. [2024-02-19 14:52:44,559 INFO L507 AbstractCegarLoop]: Abstraction has has 337 places, 4786 transitions, 189548 flow [2024-02-19 14:52:44,559 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) [2024-02-19 14:52:44,559 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:44,559 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] [2024-02-19 14:52:44,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:44,760 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 [2024-02-19 14:52:44,760 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:44,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1082293875, now seen corresponding path program 12 times [2024-02-19 14:52:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785112212] [2024-02-19 14:52:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:44,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785112212] [2024-02-19 14:52:44,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785112212] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472453149] [2024-02-19 14:52:44,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:52:44,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:44,846 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) [2024-02-19 14:52:44,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-19 14:52:44,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:52:44,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:44,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:52:44,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:44,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:45,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472453149] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:45,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:45,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:52:45,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888215451] [2024-02-19 14:52:45,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:45,029 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:52:45,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:52:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:52:47,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-19 14:52:47,779 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:52:47,779 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) [2024-02-19 14:52:47,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:47,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:52:47,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:53:03,932 INFO L124 PetriNetUnfolderBase]: 9569/16124 cut-off events. [2024-02-19 14:53:03,933 INFO L125 PetriNetUnfolderBase]: For 339402/340036 co-relation queries the response was YES. [2024-02-19 14:53:03,953 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. [2024-02-19 14:53:04,125 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 3914 selfloop transitions, 1242 changer transitions 720/5881 dead transitions. [2024-02-19 14:53:04,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 5881 transitions, 244534 flow [2024-02-19 14:53:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:53:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:53:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 236 transitions. [2024-02-19 14:53:04,126 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.466403162055336 [2024-02-19 14:53:04,126 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 333 predicate places. [2024-02-19 14:53:04,126 INFO L507 AbstractCegarLoop]: Abstraction has has 358 places, 5881 transitions, 244534 flow [2024-02-19 14:53:04,126 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) [2024-02-19 14:53:04,126 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:53:04,127 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] [2024-02-19 14:53:04,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-19 14:53:04,337 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 [2024-02-19 14:53:04,337 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:53:04,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:53:04,338 INFO L85 PathProgramCache]: Analyzing trace with hash 676455437, now seen corresponding path program 13 times [2024-02-19 14:53:04,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:53:04,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604135875] [2024-02-19 14:53:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:53:04,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:53:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:04,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:53:04,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604135875] [2024-02-19 14:53:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604135875] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:53:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34749289] [2024-02-19 14:53:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:53:04,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:53:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:53:04,441 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) [2024-02-19 14:53:04,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-19 14:53:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:04,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:53:04,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:53:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:04,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:53:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34749289] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:53:04,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:53:04,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 14:53:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912871686] [2024-02-19 14:53:04,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:53:04,796 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 14:53:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:53:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 14:53:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-19 14:53:04,801 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:53:04,803 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) [2024-02-19 14:53:04,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:53:04,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:53:04,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:53:26,543 INFO L124 PetriNetUnfolderBase]: 10423/17475 cut-off events. [2024-02-19 14:53:26,543 INFO L125 PetriNetUnfolderBase]: For 410835/411549 co-relation queries the response was YES. [2024-02-19 14:53:26,566 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. [2024-02-19 14:53:26,752 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 4692 selfloop transitions, 880 changer transitions 756/6333 dead transitions. [2024-02-19 14:53:26,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 6333 transitions, 275918 flow [2024-02-19 14:53:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 14:53:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 14:53:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 169 transitions. [2024-02-19 14:53:26,754 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48985507246376814 [2024-02-19 14:53:26,754 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 347 predicate places. [2024-02-19 14:53:26,754 INFO L507 AbstractCegarLoop]: Abstraction has has 372 places, 6333 transitions, 275918 flow [2024-02-19 14:53:26,754 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) [2024-02-19 14:53:26,755 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:53:26,755 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] [2024-02-19 14:53:26,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-19 14:53:26,960 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 [2024-02-19 14:53:26,960 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:53:26,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:53:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1750946725, now seen corresponding path program 14 times [2024-02-19 14:53:26,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:53:26,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810840718] [2024-02-19 14:53:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:53:26,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:53:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:27,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:53:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810840718] [2024-02-19 14:53:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810840718] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:53:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214320431] [2024-02-19 14:53:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:53:27,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:53:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:53:27,041 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) [2024-02-19 14:53:27,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-19 14:53:27,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:53:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:53:27,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:53:27,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:53:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:27,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:53:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:27,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214320431] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:53:27,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:53:27,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-19 14:53:27,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174563112] [2024-02-19 14:53:27,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:53:27,218 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-19 14:53:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:53:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-19 14:53:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-02-19 14:53:27,227 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:53:27,227 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) [2024-02-19 14:53:27,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:53:27,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:53:27,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:53:37,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-19 14:54:08,367 INFO L124 PetriNetUnfolderBase]: 15116/25173 cut-off events. [2024-02-19 14:54:08,367 INFO L125 PetriNetUnfolderBase]: For 697727/698886 co-relation queries the response was YES. [2024-02-19 14:54:08,406 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. [2024-02-19 14:54:08,884 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 4828 selfloop transitions, 3052 changer transitions 959/8844 dead transitions. [2024-02-19 14:54:08,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 8844 transitions, 403063 flow [2024-02-19 14:54:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-19 14:54:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-19 14:54:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 331 transitions. [2024-02-19 14:54:08,888 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4642356241234222 [2024-02-19 14:54:08,888 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 377 predicate places. [2024-02-19 14:54:08,888 INFO L507 AbstractCegarLoop]: Abstraction has has 402 places, 8844 transitions, 403063 flow [2024-02-19 14:54:08,889 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) [2024-02-19 14:54:08,889 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:54:08,889 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] [2024-02-19 14:54:08,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-19 14:54:09,099 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 [2024-02-19 14:54:09,100 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:54:09,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:54:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2101094363, now seen corresponding path program 15 times [2024-02-19 14:54:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:54:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730564336] [2024-02-19 14:54:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:54:09,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:54:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:54:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:54:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:54:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730564336] [2024-02-19 14:54:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730564336] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:54:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792480201] [2024-02-19 14:54:09,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:54:09,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:54:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:54:09,196 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) [2024-02-19 14:54:09,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-19 14:54:09,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:54:09,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:54:09,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 14:54:09,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:54:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:54:09,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:54:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:54:09,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792480201] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:54:09,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:54:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:54:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961427558] [2024-02-19 14:54:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:54:09,376 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:54:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:54:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:54:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:54:09,398 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:54:09,398 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) [2024-02-19 14:54:09,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:54:09,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:54:09,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:55:21,523 INFO L124 PetriNetUnfolderBase]: 15141/25253 cut-off events. [2024-02-19 14:55:21,524 INFO L125 PetriNetUnfolderBase]: For 746661/747833 co-relation queries the response was YES. [2024-02-19 14:55:21,567 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. [2024-02-19 14:55:21,914 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 5456 selfloop transitions, 2450 changer transitions 977/8888 dead transitions. [2024-02-19 14:55:21,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 8888 transitions, 422843 flow [2024-02-19 14:55:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:55:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:55:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 214 transitions. [2024-02-19 14:55:21,915 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2024-02-19 14:55:21,915 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 396 predicate places. [2024-02-19 14:55:21,915 INFO L507 AbstractCegarLoop]: Abstraction has has 421 places, 8888 transitions, 422843 flow [2024-02-19 14:55:21,915 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) [2024-02-19 14:55:21,916 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:55:21,916 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] [2024-02-19 14:55:21,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-02-19 14:55:22,127 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 [2024-02-19 14:55:22,127 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:55:22,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:55:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -13405580, now seen corresponding path program 16 times [2024-02-19 14:55:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:55:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054265712] [2024-02-19 14:55:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:55:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:55:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:55:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:55:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:55:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054265712] [2024-02-19 14:55:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054265712] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:55:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131024496] [2024-02-19 14:55:22,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:55:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:55:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:55:22,397 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) [2024-02-19 14:55:22,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-19 14:55:22,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:55:22,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:55:22,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 14:55:22,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:55:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:55:22,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:55:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:55:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131024496] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:55:22,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:55:22,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-02-19 14:55:22,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338957350] [2024-02-19 14:55:22,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:55:22,546 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:55:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:55:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:55:22,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:55:22,549 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-19 14:55:22,549 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) [2024-02-19 14:55:22,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:55:22,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-19 14:55:22,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:57:42,509 INFO L124 PetriNetUnfolderBase]: 25230/42064 cut-off events. [2024-02-19 14:57:42,509 INFO L125 PetriNetUnfolderBase]: For 1078915/1082653 co-relation queries the response was YES. [2024-02-19 14:57:42,605 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. [2024-02-19 14:57:43,221 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 10624 selfloop transitions, 863 changer transitions 1696/14410 dead transitions. [2024-02-19 14:57:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 14410 transitions, 715059 flow [2024-02-19 14:57:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:57:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:57:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-02-19 14:57:43,222 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7739130434782608 [2024-02-19 14:57:43,222 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 400 predicate places. [2024-02-19 14:57:43,222 INFO L507 AbstractCegarLoop]: Abstraction has has 425 places, 14410 transitions, 715059 flow [2024-02-19 14:57:43,223 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) [2024-02-19 14:57:43,223 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:57:43,223 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] [2024-02-19 14:57:43,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-02-19 14:57:43,423 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 [2024-02-19 14:57:43,423 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:57:43,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:57:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash -63220930, now seen corresponding path program 17 times [2024-02-19 14:57:43,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:57:43,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652118735] [2024-02-19 14:57:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:57:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:57:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:57:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:57:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:57:43,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652118735] [2024-02-19 14:57:43,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652118735] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:57:43,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750727595] [2024-02-19 14:57:43,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:57:43,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:57:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:57:43,579 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) [2024-02-19 14:57:43,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-19 14:57:43,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:57:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:57:43,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-19 14:57:43,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:57:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:57:43,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:57:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:57:43,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750727595] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:57:43,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:57:43,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-02-19 14:57:43,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686571785] [2024-02-19 14:57:43,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:57:43,993 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:57:43,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:57:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:57:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:57:44,011 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 14:57:44,012 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) [2024-02-19 14:57:44,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:57:44,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 14:57:44,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:02:20,127 INFO L124 PetriNetUnfolderBase]: 29035/48626 cut-off events. [2024-02-19 15:02:20,128 INFO L125 PetriNetUnfolderBase]: For 1395292/1398912 co-relation queries the response was YES. [2024-02-19 15:02:20,239 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. [2024-02-19 15:02:21,042 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 8444 selfloop transitions, 6724 changer transitions 1919/17095 dead transitions. [2024-02-19 15:02:21,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 17095 transitions, 881752 flow [2024-02-19 15:02:21,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-19 15:02:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-19 15:02:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 478 transitions. [2024-02-19 15:02:21,043 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4329710144927536 [2024-02-19 15:02:21,043 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 447 predicate places. [2024-02-19 15:02:21,044 INFO L507 AbstractCegarLoop]: Abstraction has has 472 places, 17095 transitions, 881752 flow [2024-02-19 15:02:21,044 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) [2024-02-19 15:02:21,044 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:02:21,044 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] [2024-02-19 15:02:21,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-19 15:02:21,255 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 [2024-02-19 15:02:21,256 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:02:21,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:02:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1016921956, now seen corresponding path program 18 times [2024-02-19 15:02:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:02:21,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842907185] [2024-02-19 15:02:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:02:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:02:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:02:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:02:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:02:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842907185] [2024-02-19 15:02:21,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842907185] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:02:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643510689] [2024-02-19 15:02:21,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:02:21,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:02:21,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:02:21,436 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) [2024-02-19 15:02:21,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-19 15:02:21,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-02-19 15:02:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:02:21,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-19 15:02:21,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:02:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:02:21,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:02:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:02:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643510689] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:02:21,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:02:21,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-02-19 15:02:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280884517] [2024-02-19 15:02:21,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:02:21,745 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 15:02:21,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:02:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 15:02:21,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2024-02-19 15:02:21,779 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-19 15:02:21,780 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) [2024-02-19 15:02:21,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:02:21,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-19 15:02:21,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15