./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:49:09,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:49:09,677 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:49:09,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:49:09,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:49:09,711 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:49:09,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:49:09,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:49:09,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:49:09,713 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:49:09,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:49:09,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:49:09,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:49:09,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:49:09,714 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:49:09,714 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:49:09,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:49:09,715 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:49:09,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:49:09,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:49:09,716 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:49:09,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:49:09,721 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:49:09,721 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:49:09,722 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:49:09,722 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:49:09,722 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:49:09,723 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:49:09,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:49:09,723 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:49:09,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:49:09,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:49:09,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:49:09,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:49:09,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:49:09,724 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:49:09,725 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:49:09,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:49:09,725 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:49:09,725 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:49:09,726 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:49:09,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:49:09,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:49:09,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-01-27 15:49:09,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:49:09,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:49:09,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:49:09,926 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:49:09,927 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:49:09,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2024-01-27 15:49:11,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:49:11,174 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:49:11,175 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2024-01-27 15:49:11,181 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a06ea7345/3367fa660dea451e9229757777d70669/FLAGbaf00a883 [2024-01-27 15:49:11,192 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a06ea7345/3367fa660dea451e9229757777d70669 [2024-01-27 15:49:11,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:49:11,195 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:49:11,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:49:11,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:49:11,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:49:11,201 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3424810b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11, skipping insertion in model container [2024-01-27 15:49:11,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:49:11,345 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-more-sum-array-hom.wvr.c[2435,2448] [2024-01-27 15:49:11,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:49:11,360 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:49:11,377 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-more-sum-array-hom.wvr.c[2435,2448] [2024-01-27 15:49:11,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:49:11,416 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:49:11,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11 WrapperNode [2024-01-27 15:49:11,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:49:11,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:49:11,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:49:11,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:49:11,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,455 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2024-01-27 15:49:11,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:49:11,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:49:11,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:49:11,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:49:11,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,468 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,490 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 2, 2, 4]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:49:11,490 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,490 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,496 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,525 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:49:11,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:49:11,528 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:49:11,528 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:49:11,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (1/1) ... [2024-01-27 15:49:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:49:11,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:11,569 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) [2024-01-27 15:49:11,603 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 [2024-01-27 15:49:11,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:49:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:49:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:49:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:49:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:49:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:49:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:49:11,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:49:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:49:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:49:11,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:49:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:49:11,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:49:11,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:49:11,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:49:11,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:49:11,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:49:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:49:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:49:11,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:49:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:49:11,633 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:49:11,760 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:49:11,762 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:49:11,980 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:49:11,983 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:49:12,140 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:49:12,140 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:49:12,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:49:12 BoogieIcfgContainer [2024-01-27 15:49:12,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:49:12,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:49:12,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:49:12,145 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:49:12,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:49:11" (1/3) ... [2024-01-27 15:49:12,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dbe806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:49:12, skipping insertion in model container [2024-01-27 15:49:12,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:11" (2/3) ... [2024-01-27 15:49:12,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dbe806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:49:12, skipping insertion in model container [2024-01-27 15:49:12,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:49:12" (3/3) ... [2024-01-27 15:49:12,147 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-01-27 15:49:12,155 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:49:12,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:49:12,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:49:12,163 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:49:12,206 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:49:12,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 29 transitions, 79 flow [2024-01-27 15:49:12,265 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-01-27 15:49:12,266 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:49:12,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 4/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-01-27 15:49:12,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 29 transitions, 79 flow [2024-01-27 15:49:12,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 25 transitions, 68 flow [2024-01-27 15:49:12,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:49:12,297 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7111609d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:49:12,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:49:12,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:49:12,310 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-01-27 15:49:12,310 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:49:12,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:12,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:12,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:12,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash -162002281, now seen corresponding path program 1 times [2024-01-27 15:49:12,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:12,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862124234] [2024-01-27 15:49:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862124234] [2024-01-27 15:49:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862124234] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:49:12,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999253594] [2024-01-27 15:49:12,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:12,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:49:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:49:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:49:12,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:12,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 68 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) [2024-01-27 15:49:12,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:12,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:12,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:13,181 INFO L124 PetriNetUnfolderBase]: 429/633 cut-off events. [2024-01-27 15:49:13,181 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-01-27 15:49:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1342 conditions, 633 events. 429/633 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2011 event pairs, 138 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2024-01-27 15:49:13,190 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 38 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2024-01-27 15:49:13,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 207 flow [2024-01-27 15:49:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:49:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:49:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-01-27 15:49:13,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2024-01-27 15:49:13,201 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 68 flow. Second operand 3 states and 56 transitions. [2024-01-27 15:49:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 207 flow [2024-01-27 15:49:13,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 185 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:13,208 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 82 flow [2024-01-27 15:49:13,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-01-27 15:49:13,213 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-01-27 15:49:13,214 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 82 flow [2024-01-27 15:49:13,214 INFO L496 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) [2024-01-27 15:49:13,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:13,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:13,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:49:13,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:13,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash -547139391, now seen corresponding path program 1 times [2024-01-27 15:49:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:13,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110460490] [2024-01-27 15:49:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:13,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:13,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:13,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110460490] [2024-01-27 15:49:13,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110460490] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:13,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:49:13,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830795559] [2024-01-27 15:49:13,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:13,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:13,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:13,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:13,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:13,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:13,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:13,592 INFO L124 PetriNetUnfolderBase]: 785/1179 cut-off events. [2024-01-27 15:49:13,592 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2024-01-27 15:49:13,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1179 events. 785/1179 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4365 event pairs, 457 based on Foata normal form. 46/1223 useless extension candidates. Maximal degree in co-relation 998. Up to 633 conditions per place. [2024-01-27 15:49:13,599 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 59 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-01-27 15:49:13,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 65 transitions, 314 flow [2024-01-27 15:49:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-01-27 15:49:13,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379310344827586 [2024-01-27 15:49:13,602 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 82 flow. Second operand 5 states and 78 transitions. [2024-01-27 15:49:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 65 transitions, 314 flow [2024-01-27 15:49:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 65 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:49:13,604 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 116 flow [2024-01-27 15:49:13,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-01-27 15:49:13,606 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-01-27 15:49:13,606 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 116 flow [2024-01-27 15:49:13,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:13,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:13,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:13,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:49:13,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:13,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 217509826, now seen corresponding path program 1 times [2024-01-27 15:49:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:13,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005385063] [2024-01-27 15:49:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:13,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005385063] [2024-01-27 15:49:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005385063] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:49:13,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556173410] [2024-01-27 15:49:13,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:13,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:13,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:13,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:13,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:13,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:13,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:13,829 INFO L124 PetriNetUnfolderBase]: 683/1047 cut-off events. [2024-01-27 15:49:13,829 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-01-27 15:49:13,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1047 events. 683/1047 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3881 event pairs, 417 based on Foata normal form. 46/1092 useless extension candidates. Maximal degree in co-relation 1603. Up to 633 conditions per place. [2024-01-27 15:49:13,834 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-01-27 15:49:13,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 61 transitions, 320 flow [2024-01-27 15:49:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-01-27 15:49:13,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2024-01-27 15:49:13,836 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 116 flow. Second operand 5 states and 76 transitions. [2024-01-27 15:49:13,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 61 transitions, 320 flow [2024-01-27 15:49:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 316 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:49:13,838 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 139 flow [2024-01-27 15:49:13,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-01-27 15:49:13,838 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-01-27 15:49:13,839 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 139 flow [2024-01-27 15:49:13,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:13,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:13,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:13,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:49:13,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:13,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1563564485, now seen corresponding path program 1 times [2024-01-27 15:49:13,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:13,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366034216] [2024-01-27 15:49:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:13,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:13,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366034216] [2024-01-27 15:49:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366034216] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:13,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:13,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:49:13,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342923220] [2024-01-27 15:49:13,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:13,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:13,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:13,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:13,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:13,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:13,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:13,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:14,044 INFO L124 PetriNetUnfolderBase]: 567/876 cut-off events. [2024-01-27 15:49:14,045 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-01-27 15:49:14,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2520 conditions, 876 events. 567/876 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3118 event pairs, 369 based on Foata normal form. 26/901 useless extension candidates. Maximal degree in co-relation 1779. Up to 633 conditions per place. [2024-01-27 15:49:14,049 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 26 selfloop transitions, 2 changer transitions 27/56 dead transitions. [2024-01-27 15:49:14,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 317 flow [2024-01-27 15:49:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-01-27 15:49:14,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503448275862069 [2024-01-27 15:49:14,052 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 139 flow. Second operand 5 states and 73 transitions. [2024-01-27 15:49:14,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 317 flow [2024-01-27 15:49:14,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:49:14,054 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 112 flow [2024-01-27 15:49:14,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2024-01-27 15:49:14,055 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-01-27 15:49:14,055 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 112 flow [2024-01-27 15:49:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:14,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:14,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:14,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:49:14,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:14,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1540334460, now seen corresponding path program 1 times [2024-01-27 15:49:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865420346] [2024-01-27 15:49:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:14,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:14,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865420346] [2024-01-27 15:49:14,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865420346] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:14,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743829368] [2024-01-27 15:49:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:14,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:14,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:14,168 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) [2024-01-27 15:49:14,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:49:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:14,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:49:14,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:14,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:14,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743829368] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:14,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:49:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-01-27 15:49:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016337148] [2024-01-27 15:49:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:49:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:49:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:14,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:14,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:14,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:14,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:14,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:14,624 INFO L124 PetriNetUnfolderBase]: 578/862 cut-off events. [2024-01-27 15:49:14,624 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2024-01-27 15:49:14,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 862 events. 578/862 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3023 event pairs, 166 based on Foata normal form. 18/879 useless extension candidates. Maximal degree in co-relation 2593. Up to 421 conditions per place. [2024-01-27 15:49:14,629 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 62 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-01-27 15:49:14,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 72 transitions, 418 flow [2024-01-27 15:49:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-01-27 15:49:14,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-27 15:49:14,631 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 112 flow. Second operand 7 states and 91 transitions. [2024-01-27 15:49:14,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 72 transitions, 418 flow [2024-01-27 15:49:14,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 72 transitions, 350 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-01-27 15:49:14,635 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 143 flow [2024-01-27 15:49:14,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=143, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-01-27 15:49:14,636 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-01-27 15:49:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 143 flow [2024-01-27 15:49:14,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:14,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:14,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:14,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:14,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:14,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:14,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 186307246, now seen corresponding path program 2 times [2024-01-27 15:49:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850273804] [2024-01-27 15:49:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850273804] [2024-01-27 15:49:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850273804] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563727936] [2024-01-27 15:49:14,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:14,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:14,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:14,981 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) [2024-01-27 15:49:15,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:49:15,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:15,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:15,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:49:15,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:15,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563727936] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:15,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:49:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-01-27 15:49:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552256549] [2024-01-27 15:49:15,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:49:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:49:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:15,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:15,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:15,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:15,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:15,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:15,365 INFO L124 PetriNetUnfolderBase]: 765/1145 cut-off events. [2024-01-27 15:49:15,365 INFO L125 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2024-01-27 15:49:15,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1145 events. 765/1145 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4282 event pairs, 264 based on Foata normal form. 14/1158 useless extension candidates. Maximal degree in co-relation 3453. Up to 665 conditions per place. [2024-01-27 15:49:15,371 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 64 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-01-27 15:49:15,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 77 transitions, 463 flow [2024-01-27 15:49:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-01-27 15:49:15,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 15:49:15,372 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 143 flow. Second operand 7 states and 87 transitions. [2024-01-27 15:49:15,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 77 transitions, 463 flow [2024-01-27 15:49:15,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 428 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-01-27 15:49:15,375 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 200 flow [2024-01-27 15:49:15,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-01-27 15:49:15,376 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-01-27 15:49:15,376 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 200 flow [2024-01-27 15:49:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:15,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:15,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:15,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:49:15,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:15,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash 931640946, now seen corresponding path program 3 times [2024-01-27 15:49:15,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:15,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725280450] [2024-01-27 15:49:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:15,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:15,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725280450] [2024-01-27 15:49:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725280450] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886750929] [2024-01-27 15:49:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:15,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:15,690 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) [2024-01-27 15:49:15,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:49:15,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:49:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:15,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:49:15,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:15,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886750929] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:15,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:49:15,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-01-27 15:49:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251177267] [2024-01-27 15:49:15,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:49:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:49:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:49:15,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:15,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:15,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:15,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:15,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:16,154 INFO L124 PetriNetUnfolderBase]: 887/1335 cut-off events. [2024-01-27 15:49:16,154 INFO L125 PetriNetUnfolderBase]: For 2424/2424 co-relation queries the response was YES. [2024-01-27 15:49:16,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4692 conditions, 1335 events. 887/1335 cut-off events. For 2424/2424 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5180 event pairs, 362 based on Foata normal form. 18/1352 useless extension candidates. Maximal degree in co-relation 4667. Up to 942 conditions per place. [2024-01-27 15:49:16,160 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 62 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-01-27 15:49:16,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 543 flow [2024-01-27 15:49:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-01-27 15:49:16,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43349753694581283 [2024-01-27 15:49:16,162 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 200 flow. Second operand 7 states and 88 transitions. [2024-01-27 15:49:16,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 543 flow [2024-01-27 15:49:16,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 80 transitions, 502 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-01-27 15:49:16,166 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 297 flow [2024-01-27 15:49:16,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-01-27 15:49:16,167 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2024-01-27 15:49:16,167 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 297 flow [2024-01-27 15:49:16,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:16,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:16,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:16,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:16,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:16,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash -320070162, now seen corresponding path program 4 times [2024-01-27 15:49:16,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:16,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644145954] [2024-01-27 15:49:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644145954] [2024-01-27 15:49:16,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644145954] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083807046] [2024-01-27 15:49:16,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:49:16,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:16,561 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) [2024-01-27 15:49:16,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:49:16,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:49:16,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:16,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:49:16,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:16,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083807046] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:16,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:49:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076570611] [2024-01-27 15:49:16,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:16,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:49:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:49:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:16,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:16,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 297 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 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) [2024-01-27 15:49:16,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:16,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:16,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:17,205 INFO L124 PetriNetUnfolderBase]: 869/1317 cut-off events. [2024-01-27 15:49:17,205 INFO L125 PetriNetUnfolderBase]: For 3579/3579 co-relation queries the response was YES. [2024-01-27 15:49:17,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5099 conditions, 1317 events. 869/1317 cut-off events. For 3579/3579 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5312 event pairs, 166 based on Foata normal form. 18/1334 useless extension candidates. Maximal degree in co-relation 5071. Up to 459 conditions per place. [2024-01-27 15:49:17,212 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 104 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-01-27 15:49:17,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 176 transitions, 1384 flow [2024-01-27 15:49:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:49:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:49:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 194 transitions. [2024-01-27 15:49:17,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716475095785441 [2024-01-27 15:49:17,214 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 297 flow. Second operand 18 states and 194 transitions. [2024-01-27 15:49:17,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 176 transitions, 1384 flow [2024-01-27 15:49:17,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 176 transitions, 1264 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-01-27 15:49:17,221 INFO L231 Difference]: Finished difference. Result has 65 places, 101 transitions, 834 flow [2024-01-27 15:49:17,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=834, PETRI_PLACES=65, PETRI_TRANSITIONS=101} [2024-01-27 15:49:17,222 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-01-27 15:49:17,222 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 101 transitions, 834 flow [2024-01-27 15:49:17,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 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) [2024-01-27 15:49:17,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:17,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:17,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:17,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:17,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -281114734, now seen corresponding path program 5 times [2024-01-27 15:49:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:17,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128699224] [2024-01-27 15:49:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:17,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:17,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128699224] [2024-01-27 15:49:17,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128699224] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196281273] [2024-01-27 15:49:17,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:49:17,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:17,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:17,567 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) [2024-01-27 15:49:17,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:49:17,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:17,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:17,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:49:17,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:17,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:17,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196281273] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:17,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:17,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:49:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496803161] [2024-01-27 15:49:17,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:17,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:49:17,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:49:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:49:17,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:17,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 101 transitions, 834 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:17,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:17,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:17,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:18,152 INFO L124 PetriNetUnfolderBase]: 850/1276 cut-off events. [2024-01-27 15:49:18,153 INFO L125 PetriNetUnfolderBase]: For 3790/3790 co-relation queries the response was YES. [2024-01-27 15:49:18,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5458 conditions, 1276 events. 850/1276 cut-off events. For 3790/3790 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4992 event pairs, 208 based on Foata normal form. 14/1290 useless extension candidates. Maximal degree in co-relation 5427. Up to 622 conditions per place. [2024-01-27 15:49:18,161 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 86 selfloop transitions, 75 changer transitions 0/162 dead transitions. [2024-01-27 15:49:18,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 162 transitions, 1407 flow [2024-01-27 15:49:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:49:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:49:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2024-01-27 15:49:18,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2024-01-27 15:49:18,162 INFO L175 Difference]: Start difference. First operand has 65 places, 101 transitions, 834 flow. Second operand 14 states and 150 transitions. [2024-01-27 15:49:18,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 162 transitions, 1407 flow [2024-01-27 15:49:18,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 162 transitions, 1272 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-01-27 15:49:18,175 INFO L231 Difference]: Finished difference. Result has 76 places, 119 transitions, 987 flow [2024-01-27 15:49:18,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=987, PETRI_PLACES=76, PETRI_TRANSITIONS=119} [2024-01-27 15:49:18,176 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-01-27 15:49:18,176 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 119 transitions, 987 flow [2024-01-27 15:49:18,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:18,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:18,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:18,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:18,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:18,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:18,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1661287816, now seen corresponding path program 6 times [2024-01-27 15:49:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:18,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828064355] [2024-01-27 15:49:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:18,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:18,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828064355] [2024-01-27 15:49:18,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828064355] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:18,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126878242] [2024-01-27 15:49:18,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:49:18,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:18,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:18,505 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) [2024-01-27 15:49:18,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:49:18,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:49:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:18,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:49:18,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:18,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126878242] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:49:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-01-27 15:49:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604839674] [2024-01-27 15:49:18,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:49:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:49:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:49:18,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:18,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 119 transitions, 987 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:18,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:18,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:18,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:18,904 INFO L124 PetriNetUnfolderBase]: 831/1235 cut-off events. [2024-01-27 15:49:18,904 INFO L125 PetriNetUnfolderBase]: For 4002/4002 co-relation queries the response was YES. [2024-01-27 15:49:18,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5490 conditions, 1235 events. 831/1235 cut-off events. For 4002/4002 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4696 event pairs, 214 based on Foata normal form. 14/1249 useless extension candidates. Maximal degree in co-relation 5455. Up to 697 conditions per place. [2024-01-27 15:49:18,911 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 89 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-01-27 15:49:18,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 140 transitions, 1311 flow [2024-01-27 15:49:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-01-27 15:49:18,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43349753694581283 [2024-01-27 15:49:18,913 INFO L175 Difference]: Start difference. First operand has 76 places, 119 transitions, 987 flow. Second operand 7 states and 88 transitions. [2024-01-27 15:49:18,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 140 transitions, 1311 flow [2024-01-27 15:49:18,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 140 transitions, 1228 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:18,923 INFO L231 Difference]: Finished difference. Result has 74 places, 115 transitions, 968 flow [2024-01-27 15:49:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=968, PETRI_PLACES=74, PETRI_TRANSITIONS=115} [2024-01-27 15:49:18,923 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-01-27 15:49:18,923 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 115 transitions, 968 flow [2024-01-27 15:49:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:18,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:19,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:19,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:19,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash 381730082, now seen corresponding path program 1 times [2024-01-27 15:49:19,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:19,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041793240] [2024-01-27 15:49:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:19,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:19,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:19,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041793240] [2024-01-27 15:49:19,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041793240] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:19,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156176244] [2024-01-27 15:49:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:19,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:19,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:19,213 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) [2024-01-27 15:49:19,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:49:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:19,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:49:19,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:19,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156176244] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:19,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:49:19,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-01-27 15:49:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645120298] [2024-01-27 15:49:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:19,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:49:19,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:19,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 115 transitions, 968 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:19,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:19,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:19,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:19,452 INFO L124 PetriNetUnfolderBase]: 788/1160 cut-off events. [2024-01-27 15:49:19,452 INFO L125 PetriNetUnfolderBase]: For 3877/3877 co-relation queries the response was YES. [2024-01-27 15:49:19,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5031 conditions, 1160 events. 788/1160 cut-off events. For 3877/3877 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4218 event pairs, 242 based on Foata normal form. 70/1230 useless extension candidates. Maximal degree in co-relation 4996. Up to 923 conditions per place. [2024-01-27 15:49:19,459 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 124 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-01-27 15:49:19,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 1434 flow [2024-01-27 15:49:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-01-27 15:49:19,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-27 15:49:19,460 INFO L175 Difference]: Start difference. First operand has 74 places, 115 transitions, 968 flow. Second operand 5 states and 58 transitions. [2024-01-27 15:49:19,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 1434 flow [2024-01-27 15:49:19,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 139 transitions, 1312 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:19,470 INFO L231 Difference]: Finished difference. Result has 73 places, 116 transitions, 926 flow [2024-01-27 15:49:19,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=926, PETRI_PLACES=73, PETRI_TRANSITIONS=116} [2024-01-27 15:49:19,471 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-01-27 15:49:19,471 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 116 transitions, 926 flow [2024-01-27 15:49:19,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:19,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:19,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:19,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:19,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 171998528, now seen corresponding path program 1 times [2024-01-27 15:49:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:19,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614334741] [2024-01-27 15:49:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614334741] [2024-01-27 15:49:20,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614334741] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:20,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029237444] [2024-01-27 15:49:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:20,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:20,185 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) [2024-01-27 15:49:20,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:49:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:20,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:49:20,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:20,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:20,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:20,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:20,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-01-27 15:49:20,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:20,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-01-27 15:49:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:21,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029237444] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:21,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:21,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 15:49:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518101387] [2024-01-27 15:49:21,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:21,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:49:21,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:21,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:49:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:49:21,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:21,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 116 transitions, 926 flow. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 23 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:21,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:21,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:21,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:22,736 INFO L124 PetriNetUnfolderBase]: 1423/2091 cut-off events. [2024-01-27 15:49:22,737 INFO L125 PetriNetUnfolderBase]: For 6011/6011 co-relation queries the response was YES. [2024-01-27 15:49:22,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 2091 events. 1423/2091 cut-off events. For 6011/6011 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8693 event pairs, 147 based on Foata normal form. 2/2093 useless extension candidates. Maximal degree in co-relation 8390. Up to 1281 conditions per place. [2024-01-27 15:49:22,750 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 240 selfloop transitions, 130 changer transitions 5/376 dead transitions. [2024-01-27 15:49:22,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 376 transitions, 3725 flow [2024-01-27 15:49:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:49:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:49:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-01-27 15:49:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-01-27 15:49:22,752 INFO L175 Difference]: Start difference. First operand has 73 places, 116 transitions, 926 flow. Second operand 12 states and 180 transitions. [2024-01-27 15:49:22,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 376 transitions, 3725 flow [2024-01-27 15:49:22,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 376 transitions, 3688 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-27 15:49:22,774 INFO L231 Difference]: Finished difference. Result has 88 places, 219 transitions, 2250 flow [2024-01-27 15:49:22,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2250, PETRI_PLACES=88, PETRI_TRANSITIONS=219} [2024-01-27 15:49:22,774 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-01-27 15:49:22,774 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 219 transitions, 2250 flow [2024-01-27 15:49:22,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 23 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:22,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:22,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:22,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:22,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:49:22,986 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:22,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2125986509, now seen corresponding path program 1 times [2024-01-27 15:49:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:22,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443100917] [2024-01-27 15:49:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:23,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:23,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443100917] [2024-01-27 15:49:23,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443100917] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:23,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230727037] [2024-01-27 15:49:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:23,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:23,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:23,441 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) [2024-01-27 15:49:23,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:49:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:23,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:49:23,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:23,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:23,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:23,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:23,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-01-27 15:49:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230727037] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:23,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-01-27 15:49:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477002282] [2024-01-27 15:49:23,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:23,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:49:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:49:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:49:23,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 219 transitions, 2250 flow. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:24,413 INFO L124 PetriNetUnfolderBase]: 1951/2852 cut-off events. [2024-01-27 15:49:24,414 INFO L125 PetriNetUnfolderBase]: For 10916/10916 co-relation queries the response was YES. [2024-01-27 15:49:24,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14903 conditions, 2852 events. 1951/2852 cut-off events. For 10916/10916 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12573 event pairs, 172 based on Foata normal form. 1/2853 useless extension candidates. Maximal degree in co-relation 14547. Up to 1693 conditions per place. [2024-01-27 15:49:24,433 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 212 selfloop transitions, 192 changer transitions 1/406 dead transitions. [2024-01-27 15:49:24,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 406 transitions, 4778 flow [2024-01-27 15:49:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-01-27 15:49:24,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49808429118773945 [2024-01-27 15:49:24,434 INFO L175 Difference]: Start difference. First operand has 88 places, 219 transitions, 2250 flow. Second operand 9 states and 130 transitions. [2024-01-27 15:49:24,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 406 transitions, 4778 flow [2024-01-27 15:49:24,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 406 transitions, 4571 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-01-27 15:49:24,477 INFO L231 Difference]: Finished difference. Result has 98 places, 299 transitions, 3545 flow [2024-01-27 15:49:24,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3545, PETRI_PLACES=98, PETRI_TRANSITIONS=299} [2024-01-27 15:49:24,478 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-01-27 15:49:24,478 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 299 transitions, 3545 flow [2024-01-27 15:49:24,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:24,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:24,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:24,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:49:24,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:24,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1220246708, now seen corresponding path program 2 times [2024-01-27 15:49:24,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:24,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517972766] [2024-01-27 15:49:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517972766] [2024-01-27 15:49:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517972766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125044915] [2024-01-27 15:49:25,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:25,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:25,163 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) [2024-01-27 15:49:25,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:49:25,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:25,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:49:25,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:25,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:25,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:25,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:25,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125044915] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:25,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:25,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-01-27 15:49:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261297682] [2024-01-27 15:49:25,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:49:25,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:49:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:49:25,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:25,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 299 transitions, 3545 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:25,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:25,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:25,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:26,829 INFO L124 PetriNetUnfolderBase]: 2257/3293 cut-off events. [2024-01-27 15:49:26,830 INFO L125 PetriNetUnfolderBase]: For 16423/16423 co-relation queries the response was YES. [2024-01-27 15:49:26,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19143 conditions, 3293 events. 2257/3293 cut-off events. For 16423/16423 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14756 event pairs, 285 based on Foata normal form. 1/3294 useless extension candidates. Maximal degree in co-relation 18799. Up to 2730 conditions per place. [2024-01-27 15:49:26,852 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 332 selfloop transitions, 170 changer transitions 1/504 dead transitions. [2024-01-27 15:49:26,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 504 transitions, 6346 flow [2024-01-27 15:49:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:49:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:49:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 266 transitions. [2024-01-27 15:49:26,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382183908045977 [2024-01-27 15:49:26,854 INFO L175 Difference]: Start difference. First operand has 98 places, 299 transitions, 3545 flow. Second operand 24 states and 266 transitions. [2024-01-27 15:49:26,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 504 transitions, 6346 flow [2024-01-27 15:49:26,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 504 transitions, 6225 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-01-27 15:49:26,926 INFO L231 Difference]: Finished difference. Result has 134 places, 404 transitions, 5308 flow [2024-01-27 15:49:26,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5308, PETRI_PLACES=134, PETRI_TRANSITIONS=404} [2024-01-27 15:49:26,927 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 103 predicate places. [2024-01-27 15:49:26,927 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 404 transitions, 5308 flow [2024-01-27 15:49:26,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:26,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:26,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:26,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:27,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:49:27,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:27,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash -770794773, now seen corresponding path program 2 times [2024-01-27 15:49:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373671462] [2024-01-27 15:49:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:27,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:27,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373671462] [2024-01-27 15:49:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373671462] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288932124] [2024-01-27 15:49:27,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:27,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:27,514 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) [2024-01-27 15:49:27,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:49:27,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:27,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:27,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:49:27,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:27,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:27,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:27,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:27,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288932124] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:27,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:27,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 19 [2024-01-27 15:49:27,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666042452] [2024-01-27 15:49:27,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:27,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:49:27,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:49:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:49:27,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:27,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 404 transitions, 5308 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:27,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:27,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:27,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:28,543 INFO L124 PetriNetUnfolderBase]: 2481/3612 cut-off events. [2024-01-27 15:49:28,544 INFO L125 PetriNetUnfolderBase]: For 23901/23901 co-relation queries the response was YES. [2024-01-27 15:49:28,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22985 conditions, 3612 events. 2481/3612 cut-off events. For 23901/23901 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16433 event pairs, 312 based on Foata normal form. 1/3613 useless extension candidates. Maximal degree in co-relation 22598. Up to 3090 conditions per place. [2024-01-27 15:49:28,570 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 346 selfloop transitions, 140 changer transitions 1/488 dead transitions. [2024-01-27 15:49:28,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 488 transitions, 7157 flow [2024-01-27 15:49:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-01-27 15:49:28,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559386973180077 [2024-01-27 15:49:28,572 INFO L175 Difference]: Start difference. First operand has 134 places, 404 transitions, 5308 flow. Second operand 9 states and 119 transitions. [2024-01-27 15:49:28,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 488 transitions, 7157 flow [2024-01-27 15:49:28,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 488 transitions, 6850 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:28,695 INFO L231 Difference]: Finished difference. Result has 139 places, 436 transitions, 5804 flow [2024-01-27 15:49:28,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5804, PETRI_PLACES=139, PETRI_TRANSITIONS=436} [2024-01-27 15:49:28,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-01-27 15:49:28,696 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 436 transitions, 5804 flow [2024-01-27 15:49:28,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:28,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:28,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:28,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:28,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:49:28,908 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:28,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1430592052, now seen corresponding path program 3 times [2024-01-27 15:49:28,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:28,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085376290] [2024-01-27 15:49:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085376290] [2024-01-27 15:49:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085376290] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308897636] [2024-01-27 15:49:29,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:29,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:29,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:29,408 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) [2024-01-27 15:49:29,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:49:29,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:49:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:29,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:49:29,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:29,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:29,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:29,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308897636] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:29,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:29,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 22 [2024-01-27 15:49:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131990413] [2024-01-27 15:49:29,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:29,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:49:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:29,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:49:29,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:49:29,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:29,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 436 transitions, 5804 flow. Second operand has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:30,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:30,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:30,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:31,039 INFO L124 PetriNetUnfolderBase]: 2662/3880 cut-off events. [2024-01-27 15:49:31,040 INFO L125 PetriNetUnfolderBase]: For 26521/26521 co-relation queries the response was YES. [2024-01-27 15:49:31,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25125 conditions, 3880 events. 2662/3880 cut-off events. For 26521/26521 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17951 event pairs, 354 based on Foata normal form. 1/3881 useless extension candidates. Maximal degree in co-relation 24731. Up to 3308 conditions per place. [2024-01-27 15:49:31,069 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 375 selfloop transitions, 176 changer transitions 1/553 dead transitions. [2024-01-27 15:49:31,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 553 transitions, 7955 flow [2024-01-27 15:49:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:49:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:49:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 251 transitions. [2024-01-27 15:49:31,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934169278996865 [2024-01-27 15:49:31,071 INFO L175 Difference]: Start difference. First operand has 139 places, 436 transitions, 5804 flow. Second operand 22 states and 251 transitions. [2024-01-27 15:49:31,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 553 transitions, 7955 flow [2024-01-27 15:49:31,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 553 transitions, 7754 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-01-27 15:49:31,289 INFO L231 Difference]: Finished difference. Result has 160 places, 466 transitions, 6389 flow [2024-01-27 15:49:31,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6389, PETRI_PLACES=160, PETRI_TRANSITIONS=466} [2024-01-27 15:49:31,290 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2024-01-27 15:49:31,290 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 466 transitions, 6389 flow [2024-01-27 15:49:31,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:31,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:31,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:31,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:31,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:49:31,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:31,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1888806951, now seen corresponding path program 3 times [2024-01-27 15:49:31,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:31,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75655645] [2024-01-27 15:49:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75655645] [2024-01-27 15:49:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75655645] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:31,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380765320] [2024-01-27 15:49:31,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:31,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:31,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:31,936 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) [2024-01-27 15:49:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:49:32,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:49:32,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:32,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:49:32,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:32,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:32,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:32,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:32,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-01-27 15:49:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:32,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380765320] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:32,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:32,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2024-01-27 15:49:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208456206] [2024-01-27 15:49:32,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:32,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:49:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:49:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:32,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:32,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 466 transitions, 6389 flow. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:32,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:32,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:32,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:33,086 INFO L124 PetriNetUnfolderBase]: 3010/4365 cut-off events. [2024-01-27 15:49:33,087 INFO L125 PetriNetUnfolderBase]: For 30981/30981 co-relation queries the response was YES. [2024-01-27 15:49:33,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29116 conditions, 4365 events. 3010/4365 cut-off events. For 30981/30981 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20485 event pairs, 418 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 28714. Up to 3633 conditions per place. [2024-01-27 15:49:33,122 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 383 selfloop transitions, 200 changer transitions 1/585 dead transitions. [2024-01-27 15:49:33,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 585 transitions, 8822 flow [2024-01-27 15:49:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-01-27 15:49:33,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674329501915709 [2024-01-27 15:49:33,126 INFO L175 Difference]: Start difference. First operand has 160 places, 466 transitions, 6389 flow. Second operand 9 states and 122 transitions. [2024-01-27 15:49:33,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 585 transitions, 8822 flow [2024-01-27 15:49:33,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 585 transitions, 8467 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-01-27 15:49:33,308 INFO L231 Difference]: Finished difference. Result has 162 places, 517 transitions, 7287 flow [2024-01-27 15:49:33,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7287, PETRI_PLACES=162, PETRI_TRANSITIONS=517} [2024-01-27 15:49:33,309 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2024-01-27 15:49:33,310 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 517 transitions, 7287 flow [2024-01-27 15:49:33,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:33,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:33,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:33,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:49:33,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:33,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:33,523 INFO L85 PathProgramCache]: Analyzing trace with hash 625725104, now seen corresponding path program 4 times [2024-01-27 15:49:33,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:33,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940324524] [2024-01-27 15:49:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940324524] [2024-01-27 15:49:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940324524] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445347373] [2024-01-27 15:49:33,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:49:33,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:33,857 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) [2024-01-27 15:49:33,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:49:33,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:49:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:33,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:49:33,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:34,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:34,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:34,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:34,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-01-27 15:49:34,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:34,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-01-27 15:49:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445347373] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:34,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:34,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 15:49:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185002741] [2024-01-27 15:49:34,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:49:34,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:49:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:49:34,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:34,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 517 transitions, 7287 flow. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 23 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:34,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:34,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:34,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:36,434 INFO L124 PetriNetUnfolderBase]: 3561/5146 cut-off events. [2024-01-27 15:49:36,434 INFO L125 PetriNetUnfolderBase]: For 41057/41057 co-relation queries the response was YES. [2024-01-27 15:49:36,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34947 conditions, 5146 events. 3561/5146 cut-off events. For 41057/41057 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24669 event pairs, 446 based on Foata normal form. 3/5149 useless extension candidates. Maximal degree in co-relation 34534. Up to 3974 conditions per place. [2024-01-27 15:49:36,468 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 469 selfloop transitions, 221 changer transitions 6/697 dead transitions. [2024-01-27 15:49:36,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 697 transitions, 10584 flow [2024-01-27 15:49:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:49:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:49:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 226 transitions. [2024-01-27 15:49:36,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-01-27 15:49:36,469 INFO L175 Difference]: Start difference. First operand has 162 places, 517 transitions, 7287 flow. Second operand 16 states and 226 transitions. [2024-01-27 15:49:36,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 697 transitions, 10584 flow [2024-01-27 15:49:36,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 697 transitions, 10181 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:36,739 INFO L231 Difference]: Finished difference. Result has 180 places, 580 transitions, 8478 flow [2024-01-27 15:49:36,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8478, PETRI_PLACES=180, PETRI_TRANSITIONS=580} [2024-01-27 15:49:36,740 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-27 15:49:36,740 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 580 transitions, 8478 flow [2024-01-27 15:49:36,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 23 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:36,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:36,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:36,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:36,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:36,955 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:36,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -855510479, now seen corresponding path program 4 times [2024-01-27 15:49:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:36,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647382616] [2024-01-27 15:49:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:37,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:37,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647382616] [2024-01-27 15:49:37,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647382616] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:37,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520753952] [2024-01-27 15:49:37,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:49:37,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:37,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:37,409 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) [2024-01-27 15:49:37,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:49:37,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:49:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:37,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:49:37,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:37,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:37,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:37,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:37,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520753952] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:37,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:37,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-01-27 15:49:37,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536280778] [2024-01-27 15:49:37,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:37,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:49:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:49:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:49:37,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:37,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 580 transitions, 8478 flow. Second operand has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:37,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:37,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:37,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:38,929 INFO L124 PetriNetUnfolderBase]: 3781/5465 cut-off events. [2024-01-27 15:49:38,930 INFO L125 PetriNetUnfolderBase]: For 50603/50603 co-relation queries the response was YES. [2024-01-27 15:49:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38729 conditions, 5465 events. 3781/5465 cut-off events. For 50603/50603 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26527 event pairs, 481 based on Foata normal form. 1/5466 useless extension candidates. Maximal degree in co-relation 38292. Up to 4775 conditions per place. [2024-01-27 15:49:38,969 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 481 selfloop transitions, 161 changer transitions 1/644 dead transitions. [2024-01-27 15:49:38,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 644 transitions, 10454 flow [2024-01-27 15:49:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-01-27 15:49:38,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-27 15:49:38,970 INFO L175 Difference]: Start difference. First operand has 180 places, 580 transitions, 8478 flow. Second operand 9 states and 117 transitions. [2024-01-27 15:49:38,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 644 transitions, 10454 flow [2024-01-27 15:49:39,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 644 transitions, 9971 flow, removed 215 selfloop flow, removed 3 redundant places. [2024-01-27 15:49:39,351 INFO L231 Difference]: Finished difference. Result has 187 places, 594 transitions, 8600 flow [2024-01-27 15:49:39,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8600, PETRI_PLACES=187, PETRI_TRANSITIONS=594} [2024-01-27 15:49:39,352 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-01-27 15:49:39,352 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 594 transitions, 8600 flow [2024-01-27 15:49:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:39,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:39,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:39,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:49:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:39,563 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:39,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1030382943, now seen corresponding path program 5 times [2024-01-27 15:49:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424619085] [2024-01-27 15:49:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424619085] [2024-01-27 15:49:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424619085] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847370732] [2024-01-27 15:49:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:49:39,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:39,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:39,856 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) [2024-01-27 15:49:39,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:49:39,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:39,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:39,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:49:39,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:39,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:40,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:40,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847370732] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:40,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:40,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 19 [2024-01-27 15:49:40,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148117369] [2024-01-27 15:49:40,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:40,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:49:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:49:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:49:40,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:40,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 594 transitions, 8600 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:40,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:40,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:40,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:41,272 INFO L124 PetriNetUnfolderBase]: 3887/5622 cut-off events. [2024-01-27 15:49:41,272 INFO L125 PetriNetUnfolderBase]: For 49997/49997 co-relation queries the response was YES. [2024-01-27 15:49:41,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38670 conditions, 5622 events. 3887/5622 cut-off events. For 49997/49997 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27456 event pairs, 615 based on Foata normal form. 1/5603 useless extension candidates. Maximal degree in co-relation 38227. Up to 4890 conditions per place. [2024-01-27 15:49:41,329 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 464 selfloop transitions, 210 changer transitions 1/676 dead transitions. [2024-01-27 15:49:41,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 676 transitions, 10886 flow [2024-01-27 15:49:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-01-27 15:49:41,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559386973180077 [2024-01-27 15:49:41,331 INFO L175 Difference]: Start difference. First operand has 187 places, 594 transitions, 8600 flow. Second operand 9 states and 119 transitions. [2024-01-27 15:49:41,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 676 transitions, 10886 flow [2024-01-27 15:49:41,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 676 transitions, 10584 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-01-27 15:49:41,775 INFO L231 Difference]: Finished difference. Result has 193 places, 609 transitions, 9095 flow [2024-01-27 15:49:41,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8298, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9095, PETRI_PLACES=193, PETRI_TRANSITIONS=609} [2024-01-27 15:49:41,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 162 predicate places. [2024-01-27 15:49:41,776 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 609 transitions, 9095 flow [2024-01-27 15:49:41,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:41,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:41,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:41,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:49:41,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:41,989 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:41,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash 973569233, now seen corresponding path program 6 times [2024-01-27 15:49:41,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:41,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207673134] [2024-01-27 15:49:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:41,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207673134] [2024-01-27 15:49:42,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207673134] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736002334] [2024-01-27 15:49:42,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:49:42,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:42,494 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) [2024-01-27 15:49:42,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:49:42,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:49:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:42,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:49:42,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:42,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:42,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:42,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:42,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-01-27 15:49:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:43,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736002334] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:43,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:43,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2024-01-27 15:49:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026019344] [2024-01-27 15:49:43,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:43,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:49:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:49:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:43,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:43,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 609 transitions, 9095 flow. Second operand has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:43,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:43,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:43,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:44,433 INFO L124 PetriNetUnfolderBase]: 3993/5779 cut-off events. [2024-01-27 15:49:44,433 INFO L125 PetriNetUnfolderBase]: For 54493/54493 co-relation queries the response was YES. [2024-01-27 15:49:44,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40396 conditions, 5779 events. 3993/5779 cut-off events. For 54493/54493 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28319 event pairs, 623 based on Foata normal form. 1/5760 useless extension candidates. Maximal degree in co-relation 39941. Up to 5241 conditions per place. [2024-01-27 15:49:44,493 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 500 selfloop transitions, 161 changer transitions 1/663 dead transitions. [2024-01-27 15:49:44,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 663 transitions, 10981 flow [2024-01-27 15:49:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-01-27 15:49:44,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:49:44,495 INFO L175 Difference]: Start difference. First operand has 193 places, 609 transitions, 9095 flow. Second operand 9 states and 116 transitions. [2024-01-27 15:49:44,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 663 transitions, 10981 flow [2024-01-27 15:49:45,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 663 transitions, 10532 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-01-27 15:49:45,064 INFO L231 Difference]: Finished difference. Result has 198 places, 614 transitions, 9098 flow [2024-01-27 15:49:45,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8646, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9098, PETRI_PLACES=198, PETRI_TRANSITIONS=614} [2024-01-27 15:49:45,065 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 167 predicate places. [2024-01-27 15:49:45,066 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 614 transitions, 9098 flow [2024-01-27 15:49:45,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:45,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:45,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:45,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:45,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:45,271 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:45,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -369598806, now seen corresponding path program 5 times [2024-01-27 15:49:45,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:45,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895945533] [2024-01-27 15:49:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895945533] [2024-01-27 15:49:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895945533] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113112304] [2024-01-27 15:49:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:49:45,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:45,736 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) [2024-01-27 15:49:45,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:49:45,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:45,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:45,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:49:45,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:45,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:46,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:46,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:46,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-01-27 15:49:46,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:46,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-01-27 15:49:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:46,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113112304] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:46,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:46,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 15:49:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937552149] [2024-01-27 15:49:46,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:46,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:49:46,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:49:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:49:46,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:46,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 614 transitions, 9098 flow. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 23 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:46,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:46,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:46,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:48,097 INFO L124 PetriNetUnfolderBase]: 4360/6328 cut-off events. [2024-01-27 15:49:48,098 INFO L125 PetriNetUnfolderBase]: For 60869/60869 co-relation queries the response was YES. [2024-01-27 15:49:48,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43376 conditions, 6328 events. 4360/6328 cut-off events. For 60869/60869 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31831 event pairs, 660 based on Foata normal form. 3/6311 useless extension candidates. Maximal degree in co-relation 42917. Up to 5372 conditions per place. [2024-01-27 15:49:48,153 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 555 selfloop transitions, 189 changer transitions 10/755 dead transitions. [2024-01-27 15:49:48,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 755 transitions, 12114 flow [2024-01-27 15:49:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:49:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:49:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 207 transitions. [2024-01-27 15:49:48,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2024-01-27 15:49:48,154 INFO L175 Difference]: Start difference. First operand has 198 places, 614 transitions, 9098 flow. Second operand 15 states and 207 transitions. [2024-01-27 15:49:48,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 755 transitions, 12114 flow [2024-01-27 15:49:48,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 755 transitions, 11727 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-01-27 15:49:48,684 INFO L231 Difference]: Finished difference. Result has 210 places, 655 transitions, 9760 flow [2024-01-27 15:49:48,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8711, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9760, PETRI_PLACES=210, PETRI_TRANSITIONS=655} [2024-01-27 15:49:48,685 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2024-01-27 15:49:48,685 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 655 transitions, 9760 flow [2024-01-27 15:49:48,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 23 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:48,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:48,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:48,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:48,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:48,893 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:48,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:48,894 INFO L85 PathProgramCache]: Analyzing trace with hash 532539626, now seen corresponding path program 6 times [2024-01-27 15:49:48,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:48,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562514795] [2024-01-27 15:49:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562514795] [2024-01-27 15:49:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562514795] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295755989] [2024-01-27 15:49:49,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:49:49,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:49,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:49,298 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) [2024-01-27 15:49:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:49:49,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:49:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:49,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:49:49,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:49,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:49,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:49:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:49,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:49,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295755989] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:49,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:49,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-01-27 15:49:49,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065903212] [2024-01-27 15:49:49,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:49:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:49:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:49:49,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:49,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 655 transitions, 9760 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:49,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:49,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:49,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:51,641 INFO L124 PetriNetUnfolderBase]: 4636/6722 cut-off events. [2024-01-27 15:49:51,642 INFO L125 PetriNetUnfolderBase]: For 66193/66193 co-relation queries the response was YES. [2024-01-27 15:49:51,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46847 conditions, 6722 events. 4636/6722 cut-off events. For 66193/66193 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34054 event pairs, 668 based on Foata normal form. 1/6703 useless extension candidates. Maximal degree in co-relation 46375. Up to 5947 conditions per place. [2024-01-27 15:49:51,700 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 561 selfloop transitions, 220 changer transitions 2/784 dead transitions. [2024-01-27 15:49:51,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 784 transitions, 12608 flow [2024-01-27 15:49:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:49:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:49:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 326 transitions. [2024-01-27 15:49:51,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37471264367816093 [2024-01-27 15:49:51,702 INFO L175 Difference]: Start difference. First operand has 210 places, 655 transitions, 9760 flow. Second operand 30 states and 326 transitions. [2024-01-27 15:49:51,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 784 transitions, 12608 flow [2024-01-27 15:49:52,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 784 transitions, 12206 flow, removed 129 selfloop flow, removed 5 redundant places. [2024-01-27 15:49:52,166 INFO L231 Difference]: Finished difference. Result has 241 places, 681 transitions, 10312 flow [2024-01-27 15:49:52,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10312, PETRI_PLACES=241, PETRI_TRANSITIONS=681} [2024-01-27 15:49:52,167 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2024-01-27 15:49:52,167 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 681 transitions, 10312 flow [2024-01-27 15:49:52,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:52,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:52,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:52,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:52,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:52,380 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:52,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash 481365033, now seen corresponding path program 7 times [2024-01-27 15:49:52,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:52,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725741249] [2024-01-27 15:49:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:52,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:52,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725741249] [2024-01-27 15:49:52,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725741249] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224893262] [2024-01-27 15:49:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:49:52,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:52,481 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) [2024-01-27 15:49:52,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:49:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:52,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:49:52,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:52,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:52,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224893262] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:52,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:52,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-01-27 15:49:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365430415] [2024-01-27 15:49:52,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:52,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:49:52,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:49:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:49:52,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:52,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 681 transitions, 10312 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:52,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:52,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:52,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:54,025 INFO L124 PetriNetUnfolderBase]: 5484/7953 cut-off events. [2024-01-27 15:49:54,025 INFO L125 PetriNetUnfolderBase]: For 93763/93763 co-relation queries the response was YES. [2024-01-27 15:49:54,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55912 conditions, 7953 events. 5484/7953 cut-off events. For 93763/93763 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41573 event pairs, 1589 based on Foata normal form. 208/8141 useless extension candidates. Maximal degree in co-relation 55369. Up to 5747 conditions per place. [2024-01-27 15:49:54,100 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 764 selfloop transitions, 55 changer transitions 0/820 dead transitions. [2024-01-27 15:49:54,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 820 transitions, 13663 flow [2024-01-27 15:49:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:49:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:49:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-01-27 15:49:54,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525862068965517 [2024-01-27 15:49:54,102 INFO L175 Difference]: Start difference. First operand has 241 places, 681 transitions, 10312 flow. Second operand 8 states and 105 transitions. [2024-01-27 15:49:54,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 820 transitions, 13663 flow [2024-01-27 15:49:54,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 820 transitions, 13238 flow, removed 106 selfloop flow, removed 10 redundant places. [2024-01-27 15:49:54,709 INFO L231 Difference]: Finished difference. Result has 241 places, 673 transitions, 10023 flow [2024-01-27 15:49:54,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9527, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10023, PETRI_PLACES=241, PETRI_TRANSITIONS=673} [2024-01-27 15:49:54,710 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2024-01-27 15:49:54,710 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 673 transitions, 10023 flow [2024-01-27 15:49:54,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:54,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:54,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:54,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:49:54,922 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:54,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1900516748, now seen corresponding path program 8 times [2024-01-27 15:49:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:54,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530223081] [2024-01-27 15:49:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:54,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:54,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530223081] [2024-01-27 15:49:54,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530223081] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:54,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561037048] [2024-01-27 15:49:54,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:54,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:55,009 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) [2024-01-27 15:49:55,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:49:55,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:55,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:55,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:49:55,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:55,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:55,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561037048] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:55,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:55,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:49:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012930753] [2024-01-27 15:49:55,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:55,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:49:55,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:49:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:55,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:55,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 673 transitions, 10023 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:55,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:55,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:56,522 INFO L124 PetriNetUnfolderBase]: 4824/7171 cut-off events. [2024-01-27 15:49:56,522 INFO L125 PetriNetUnfolderBase]: For 90653/90653 co-relation queries the response was YES. [2024-01-27 15:49:56,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50668 conditions, 7171 events. 4824/7171 cut-off events. For 90653/90653 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 38834 event pairs, 1244 based on Foata normal form. 390/7541 useless extension candidates. Maximal degree in co-relation 50145. Up to 3045 conditions per place. [2024-01-27 15:49:56,594 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 675 selfloop transitions, 75 changer transitions 3/754 dead transitions. [2024-01-27 15:49:56,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 754 transitions, 12302 flow [2024-01-27 15:49:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-01-27 15:49:56,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-01-27 15:49:56,595 INFO L175 Difference]: Start difference. First operand has 241 places, 673 transitions, 10023 flow. Second operand 7 states and 99 transitions. [2024-01-27 15:49:56,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 754 transitions, 12302 flow [2024-01-27 15:49:57,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 754 transitions, 12214 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-01-27 15:49:57,205 INFO L231 Difference]: Finished difference. Result has 243 places, 634 transitions, 9687 flow [2024-01-27 15:49:57,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9377, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9687, PETRI_PLACES=243, PETRI_TRANSITIONS=634} [2024-01-27 15:49:57,206 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 212 predicate places. [2024-01-27 15:49:57,206 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 634 transitions, 9687 flow [2024-01-27 15:49:57,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:57,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:57,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:57,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:57,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:49:57,418 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:57,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:57,418 INFO L85 PathProgramCache]: Analyzing trace with hash -208541324, now seen corresponding path program 7 times [2024-01-27 15:49:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:57,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922462784] [2024-01-27 15:49:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:57,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:57,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922462784] [2024-01-27 15:49:57,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922462784] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:57,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941095679] [2024-01-27 15:49:57,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:49:57,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:57,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:57,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:57,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:49:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:57,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:49:57,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:57,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941095679] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:57,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-01-27 15:49:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524113432] [2024-01-27 15:49:57,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:57,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:49:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:49:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:49:57,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:57,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 634 transitions, 9687 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:57,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:57,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:57,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:58,890 INFO L124 PetriNetUnfolderBase]: 4464/6726 cut-off events. [2024-01-27 15:49:58,890 INFO L125 PetriNetUnfolderBase]: For 82745/82745 co-relation queries the response was YES. [2024-01-27 15:49:58,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48554 conditions, 6726 events. 4464/6726 cut-off events. For 82745/82745 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 37139 event pairs, 1172 based on Foata normal form. 184/6890 useless extension candidates. Maximal degree in co-relation 48039. Up to 2541 conditions per place. [2024-01-27 15:49:58,945 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 558 selfloop transitions, 143 changer transitions 72/774 dead transitions. [2024-01-27 15:49:58,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 774 transitions, 12730 flow [2024-01-27 15:49:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-01-27 15:49:58,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-01-27 15:49:58,948 INFO L175 Difference]: Start difference. First operand has 243 places, 634 transitions, 9687 flow. Second operand 7 states and 100 transitions. [2024-01-27 15:49:58,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 774 transitions, 12730 flow [2024-01-27 15:49:59,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 774 transitions, 12454 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:59,502 INFO L231 Difference]: Finished difference. Result has 246 places, 585 transitions, 9312 flow [2024-01-27 15:49:59,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9426, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9312, PETRI_PLACES=246, PETRI_TRANSITIONS=585} [2024-01-27 15:49:59,503 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2024-01-27 15:49:59,504 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 585 transitions, 9312 flow [2024-01-27 15:49:59,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:59,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:59,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:59,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-27 15:49:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:49:59,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:59,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1312794953, now seen corresponding path program 1 times [2024-01-27 15:49:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:59,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791460737] [2024-01-27 15:49:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:59,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791460737] [2024-01-27 15:49:59,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791460737] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592820696] [2024-01-27 15:49:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:59,788 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:59,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:49:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:59,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:49:59,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:59,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:00,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592820696] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:00,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:00,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:50:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160679232] [2024-01-27 15:50:00,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:50:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:50:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:50:00,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:00,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 585 transitions, 9312 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:00,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:00,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:00,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:01,311 INFO L124 PetriNetUnfolderBase]: 4383/6663 cut-off events. [2024-01-27 15:50:01,311 INFO L125 PetriNetUnfolderBase]: For 90548/90548 co-relation queries the response was YES. [2024-01-27 15:50:01,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49306 conditions, 6663 events. 4383/6663 cut-off events. For 90548/90548 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37512 event pairs, 1006 based on Foata normal form. 100/6743 useless extension candidates. Maximal degree in co-relation 48766. Up to 2200 conditions per place. [2024-01-27 15:50:01,376 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 563 selfloop transitions, 134 changer transitions 46/744 dead transitions. [2024-01-27 15:50:01,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 744 transitions, 12332 flow [2024-01-27 15:50:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-01-27 15:50:01,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:50:01,377 INFO L175 Difference]: Start difference. First operand has 246 places, 585 transitions, 9312 flow. Second operand 10 states and 145 transitions. [2024-01-27 15:50:01,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 744 transitions, 12332 flow [2024-01-27 15:50:02,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 744 transitions, 12275 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-01-27 15:50:02,075 INFO L231 Difference]: Finished difference. Result has 256 places, 575 transitions, 9482 flow [2024-01-27 15:50:02,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9257, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9482, PETRI_PLACES=256, PETRI_TRANSITIONS=575} [2024-01-27 15:50:02,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2024-01-27 15:50:02,077 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 575 transitions, 9482 flow [2024-01-27 15:50:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:02,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:02,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:02,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:02,290 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:02,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash 235870967, now seen corresponding path program 2 times [2024-01-27 15:50:02,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:02,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684666288] [2024-01-27 15:50:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:02,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:02,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684666288] [2024-01-27 15:50:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684666288] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507485393] [2024-01-27 15:50:02,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:02,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:02,421 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:02,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:50:02,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:02,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:02,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:02,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:02,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507485393] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:02,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 15:50:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837514766] [2024-01-27 15:50:02,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:02,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:50:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:02,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:50:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:50:02,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:02,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 575 transitions, 9482 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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) [2024-01-27 15:50:02,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:02,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:02,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:04,053 INFO L124 PetriNetUnfolderBase]: 4620/6922 cut-off events. [2024-01-27 15:50:04,053 INFO L125 PetriNetUnfolderBase]: For 111475/111475 co-relation queries the response was YES. [2024-01-27 15:50:04,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53591 conditions, 6922 events. 4620/6922 cut-off events. For 111475/111475 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 38261 event pairs, 1060 based on Foata normal form. 222/7118 useless extension candidates. Maximal degree in co-relation 52918. Up to 2533 conditions per place. [2024-01-27 15:50:04,127 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 602 selfloop transitions, 180 changer transitions 27/810 dead transitions. [2024-01-27 15:50:04,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 810 transitions, 13642 flow [2024-01-27 15:50:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:50:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:50:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 172 transitions. [2024-01-27 15:50:04,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562334217506631 [2024-01-27 15:50:04,128 INFO L175 Difference]: Start difference. First operand has 256 places, 575 transitions, 9482 flow. Second operand 13 states and 172 transitions. [2024-01-27 15:50:04,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 810 transitions, 13642 flow [2024-01-27 15:50:05,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 810 transitions, 13121 flow, removed 140 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:05,018 INFO L231 Difference]: Finished difference. Result has 260 places, 600 transitions, 9966 flow [2024-01-27 15:50:05,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9169, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9966, PETRI_PLACES=260, PETRI_TRANSITIONS=600} [2024-01-27 15:50:05,019 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-01-27 15:50:05,019 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 600 transitions, 9966 flow [2024-01-27 15:50:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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) [2024-01-27 15:50:05,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:05,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:05,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:05,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:50:05,232 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:05,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1976480307, now seen corresponding path program 3 times [2024-01-27 15:50:05,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:05,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531419508] [2024-01-27 15:50:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:05,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:05,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531419508] [2024-01-27 15:50:05,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531419508] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:05,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583673684] [2024-01-27 15:50:05,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:05,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:05,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:05,305 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:05,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:50:05,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:50:05,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:05,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:05,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:05,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583673684] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:05,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:05,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:50:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923717679] [2024-01-27 15:50:05,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:50:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:50:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:50:05,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:05,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 600 transitions, 9966 flow. Second operand has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:05,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:05,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:05,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:06,844 INFO L124 PetriNetUnfolderBase]: 4409/6687 cut-off events. [2024-01-27 15:50:06,844 INFO L125 PetriNetUnfolderBase]: For 102457/102457 co-relation queries the response was YES. [2024-01-27 15:50:06,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52104 conditions, 6687 events. 4409/6687 cut-off events. For 102457/102457 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 37371 event pairs, 1066 based on Foata normal form. 100/6787 useless extension candidates. Maximal degree in co-relation 51495. Up to 2465 conditions per place. [2024-01-27 15:50:06,917 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 588 selfloop transitions, 128 changer transitions 41/758 dead transitions. [2024-01-27 15:50:06,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 758 transitions, 13040 flow [2024-01-27 15:50:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-01-27 15:50:06,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2024-01-27 15:50:06,918 INFO L175 Difference]: Start difference. First operand has 260 places, 600 transitions, 9966 flow. Second operand 10 states and 136 transitions. [2024-01-27 15:50:06,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 758 transitions, 13040 flow [2024-01-27 15:50:07,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 758 transitions, 12587 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-01-27 15:50:07,723 INFO L231 Difference]: Finished difference. Result has 260 places, 564 transitions, 9173 flow [2024-01-27 15:50:07,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9252, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9173, PETRI_PLACES=260, PETRI_TRANSITIONS=564} [2024-01-27 15:50:07,724 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-01-27 15:50:07,725 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 564 transitions, 9173 flow [2024-01-27 15:50:07,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:07,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:07,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:07,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:50:07,937 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:07,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -85399545, now seen corresponding path program 4 times [2024-01-27 15:50:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693419843] [2024-01-27 15:50:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693419843] [2024-01-27 15:50:08,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693419843] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249544840] [2024-01-27 15:50:08,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:08,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:08,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:08,046 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:08,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:50:08,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:08,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:50:08,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:08,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:08,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249544840] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:08,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:08,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2024-01-27 15:50:08,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590309939] [2024-01-27 15:50:08,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:08,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:50:08,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:08,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:50:08,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:50:08,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:08,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 564 transitions, 9173 flow. Second operand has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:08,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:08,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:08,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:10,105 INFO L124 PetriNetUnfolderBase]: 5285/7883 cut-off events. [2024-01-27 15:50:10,106 INFO L125 PetriNetUnfolderBase]: For 124223/124223 co-relation queries the response was YES. [2024-01-27 15:50:10,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61324 conditions, 7883 events. 5285/7883 cut-off events. For 124223/124223 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 44268 event pairs, 327 based on Foata normal form. 234/8117 useless extension candidates. Maximal degree in co-relation 60583. Up to 1751 conditions per place. [2024-01-27 15:50:10,185 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 612 selfloop transitions, 394 changer transitions 46/1053 dead transitions. [2024-01-27 15:50:10,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1053 transitions, 17423 flow [2024-01-27 15:50:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 15:50:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 15:50:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 445 transitions. [2024-01-27 15:50:10,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-01-27 15:50:10,194 INFO L175 Difference]: Start difference. First operand has 260 places, 564 transitions, 9173 flow. Second operand 40 states and 445 transitions. [2024-01-27 15:50:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1053 transitions, 17423 flow [2024-01-27 15:50:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1053 transitions, 16789 flow, removed 100 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:11,112 INFO L231 Difference]: Finished difference. Result has 305 places, 728 transitions, 12536 flow [2024-01-27 15:50:11,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8845, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12536, PETRI_PLACES=305, PETRI_TRANSITIONS=728} [2024-01-27 15:50:11,113 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 274 predicate places. [2024-01-27 15:50:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 728 transitions, 12536 flow [2024-01-27 15:50:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:11,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:11,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:11,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:11,325 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:11,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:11,325 INFO L85 PathProgramCache]: Analyzing trace with hash 221687375, now seen corresponding path program 5 times [2024-01-27 15:50:11,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:11,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103826854] [2024-01-27 15:50:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:11,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:11,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:11,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103826854] [2024-01-27 15:50:11,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103826854] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:11,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646663408] [2024-01-27 15:50:11,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:11,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:11,401 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:11,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:50:11,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:11,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:11,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:11,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646663408] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:11,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:11,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:50:11,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860801040] [2024-01-27 15:50:11,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:11,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:50:11,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:50:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:50:11,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:11,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 728 transitions, 12536 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:11,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:11,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:11,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:13,254 INFO L124 PetriNetUnfolderBase]: 4899/7391 cut-off events. [2024-01-27 15:50:13,254 INFO L125 PetriNetUnfolderBase]: For 135905/135905 co-relation queries the response was YES. [2024-01-27 15:50:13,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61516 conditions, 7391 events. 4899/7391 cut-off events. For 135905/135905 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42025 event pairs, 1004 based on Foata normal form. 146/7537 useless extension candidates. Maximal degree in co-relation 60777. Up to 2636 conditions per place. [2024-01-27 15:50:13,318 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 674 selfloop transitions, 139 changer transitions 52/866 dead transitions. [2024-01-27 15:50:13,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 866 transitions, 16010 flow [2024-01-27 15:50:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:50:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:50:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-01-27 15:50:13,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2024-01-27 15:50:13,319 INFO L175 Difference]: Start difference. First operand has 305 places, 728 transitions, 12536 flow. Second operand 9 states and 123 transitions. [2024-01-27 15:50:13,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 866 transitions, 16010 flow [2024-01-27 15:50:14,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 866 transitions, 15068 flow, removed 263 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:14,564 INFO L231 Difference]: Finished difference. Result has 307 places, 730 transitions, 12322 flow [2024-01-27 15:50:14,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11485, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12322, PETRI_PLACES=307, PETRI_TRANSITIONS=730} [2024-01-27 15:50:14,565 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2024-01-27 15:50:14,565 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 730 transitions, 12322 flow [2024-01-27 15:50:14,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:14,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:14,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:14,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:14,777 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:14,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1544031945, now seen corresponding path program 6 times [2024-01-27 15:50:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878719055] [2024-01-27 15:50:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:14,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:14,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878719055] [2024-01-27 15:50:14,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878719055] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:14,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457767207] [2024-01-27 15:50:14,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:14,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:14,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:14,848 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:14,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:50:14,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:50:14,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:14,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:14,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:15,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457767207] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:15,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:15,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 15:50:15,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126507037] [2024-01-27 15:50:15,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:15,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:50:15,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:15,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:50:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:50:15,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:15,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 730 transitions, 12322 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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) [2024-01-27 15:50:15,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:15,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:15,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:16,703 INFO L124 PetriNetUnfolderBase]: 4440/6809 cut-off events. [2024-01-27 15:50:16,703 INFO L125 PetriNetUnfolderBase]: For 119246/119246 co-relation queries the response was YES. [2024-01-27 15:50:16,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54217 conditions, 6809 events. 4440/6809 cut-off events. For 119246/119246 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 38993 event pairs, 839 based on Foata normal form. 234/7043 useless extension candidates. Maximal degree in co-relation 53834. Up to 2636 conditions per place. [2024-01-27 15:50:16,774 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 629 selfloop transitions, 124 changer transitions 38/792 dead transitions. [2024-01-27 15:50:16,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 792 transitions, 13514 flow [2024-01-27 15:50:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-01-27 15:50:16,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46206896551724136 [2024-01-27 15:50:16,775 INFO L175 Difference]: Start difference. First operand has 307 places, 730 transitions, 12322 flow. Second operand 10 states and 134 transitions. [2024-01-27 15:50:16,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 792 transitions, 13514 flow [2024-01-27 15:50:17,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 792 transitions, 13113 flow, removed 89 selfloop flow, removed 14 redundant places. [2024-01-27 15:50:17,695 INFO L231 Difference]: Finished difference. Result has 300 places, 650 transitions, 10589 flow [2024-01-27 15:50:17,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10062, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10589, PETRI_PLACES=300, PETRI_TRANSITIONS=650} [2024-01-27 15:50:17,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 269 predicate places. [2024-01-27 15:50:17,696 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 650 transitions, 10589 flow [2024-01-27 15:50:17,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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) [2024-01-27 15:50:17,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:17,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:17,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:17,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:17,901 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:17,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash -62758880, now seen corresponding path program 9 times [2024-01-27 15:50:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877784188] [2024-01-27 15:50:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877784188] [2024-01-27 15:50:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877784188] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746916937] [2024-01-27 15:50:17,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:17,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:17,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:17,979 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:17,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:50:18,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:50:18,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:18,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:18,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:18,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746916937] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:18,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:50:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076996249] [2024-01-27 15:50:18,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:50:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:50:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:50:18,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:18,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 650 transitions, 10589 flow. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:18,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:18,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:18,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:19,025 INFO L124 PetriNetUnfolderBase]: 2599/4003 cut-off events. [2024-01-27 15:50:19,025 INFO L125 PetriNetUnfolderBase]: For 63894/63894 co-relation queries the response was YES. [2024-01-27 15:50:19,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33527 conditions, 4003 events. 2599/4003 cut-off events. For 63894/63894 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 20955 event pairs, 707 based on Foata normal form. 264/4267 useless extension candidates. Maximal degree in co-relation 33421. Up to 2636 conditions per place. [2024-01-27 15:50:19,061 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 316 selfloop transitions, 3 changer transitions 239/559 dead transitions. [2024-01-27 15:50:19,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 559 transitions, 10288 flow [2024-01-27 15:50:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:50:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:50:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-01-27 15:50:19,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-01-27 15:50:19,062 INFO L175 Difference]: Start difference. First operand has 300 places, 650 transitions, 10589 flow. Second operand 7 states and 95 transitions. [2024-01-27 15:50:19,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 559 transitions, 10288 flow [2024-01-27 15:50:19,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 559 transitions, 9920 flow, removed 58 selfloop flow, removed 29 redundant places. [2024-01-27 15:50:19,448 INFO L231 Difference]: Finished difference. Result has 258 places, 320 transitions, 4821 flow [2024-01-27 15:50:19,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8752, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4821, PETRI_PLACES=258, PETRI_TRANSITIONS=320} [2024-01-27 15:50:19,448 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 227 predicate places. [2024-01-27 15:50:19,449 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 320 transitions, 4821 flow [2024-01-27 15:50:19,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:19,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:19,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:19,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:19,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:19,661 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:19,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1151394903, now seen corresponding path program 10 times [2024-01-27 15:50:19,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:19,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732538926] [2024-01-27 15:50:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:19,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732538926] [2024-01-27 15:50:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732538926] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441579068] [2024-01-27 15:50:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:19,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:19,768 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:19,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:50:19,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:19,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:19,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:19,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441579068] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:20,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-01-27 15:50:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829719002] [2024-01-27 15:50:20,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:50:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:50:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:50:20,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:20,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 320 transitions, 4821 flow. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 19 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:20,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:20,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:20,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:20,867 INFO L124 PetriNetUnfolderBase]: 1853/2658 cut-off events. [2024-01-27 15:50:20,867 INFO L125 PetriNetUnfolderBase]: For 41659/41659 co-relation queries the response was YES. [2024-01-27 15:50:20,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21639 conditions, 2658 events. 1853/2658 cut-off events. For 41659/41659 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11268 event pairs, 177 based on Foata normal form. 28/2686 useless extension candidates. Maximal degree in co-relation 21554. Up to 915 conditions per place. [2024-01-27 15:50:20,891 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 242 selfloop transitions, 188 changer transitions 0/431 dead transitions. [2024-01-27 15:50:20,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 431 transitions, 6918 flow [2024-01-27 15:50:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:50:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:50:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 218 transitions. [2024-01-27 15:50:20,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758620689655172 [2024-01-27 15:50:20,894 INFO L175 Difference]: Start difference. First operand has 258 places, 320 transitions, 4821 flow. Second operand 20 states and 218 transitions. [2024-01-27 15:50:20,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 431 transitions, 6918 flow [2024-01-27 15:50:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 431 transitions, 6348 flow, removed 227 selfloop flow, removed 28 redundant places. [2024-01-27 15:50:21,079 INFO L231 Difference]: Finished difference. Result has 177 places, 336 transitions, 5081 flow [2024-01-27 15:50:21,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5081, PETRI_PLACES=177, PETRI_TRANSITIONS=336} [2024-01-27 15:50:21,080 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 146 predicate places. [2024-01-27 15:50:21,080 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 336 transitions, 5081 flow [2024-01-27 15:50:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 19 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:21,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:21,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:21,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-01-27 15:50:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-27 15:50:21,286 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:21,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash 275409102, now seen corresponding path program 8 times [2024-01-27 15:50:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606762121] [2024-01-27 15:50:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:21,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:21,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:21,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606762121] [2024-01-27 15:50:21,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606762121] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:21,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510641732] [2024-01-27 15:50:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:21,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:21,395 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:21,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 15:50:21,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:21,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:21,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:21,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:21,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510641732] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:21,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-27 15:50:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521042875] [2024-01-27 15:50:21,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:50:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:50:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:50:21,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:21,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 336 transitions, 5081 flow. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:21,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:21,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:21,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:22,426 INFO L124 PetriNetUnfolderBase]: 2165/3126 cut-off events. [2024-01-27 15:50:22,426 INFO L125 PetriNetUnfolderBase]: For 43981/43981 co-relation queries the response was YES. [2024-01-27 15:50:22,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24312 conditions, 3126 events. 2165/3126 cut-off events. For 43981/43981 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13923 event pairs, 232 based on Foata normal form. 32/3158 useless extension candidates. Maximal degree in co-relation 24247. Up to 1012 conditions per place. [2024-01-27 15:50:22,450 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 356 selfloop transitions, 141 changer transitions 0/498 dead transitions. [2024-01-27 15:50:22,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 498 transitions, 8110 flow [2024-01-27 15:50:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-01-27 15:50:22,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-01-27 15:50:22,452 INFO L175 Difference]: Start difference. First operand has 177 places, 336 transitions, 5081 flow. Second operand 10 states and 117 transitions. [2024-01-27 15:50:22,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 498 transitions, 8110 flow [2024-01-27 15:50:22,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 498 transitions, 7715 flow, removed 102 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:22,624 INFO L231 Difference]: Finished difference. Result has 180 places, 356 transitions, 5512 flow [2024-01-27 15:50:22,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5512, PETRI_PLACES=180, PETRI_TRANSITIONS=356} [2024-01-27 15:50:22,625 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-27 15:50:22,625 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 356 transitions, 5512 flow [2024-01-27 15:50:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:22,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:22,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:22,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:22,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:22,837 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 157359256, now seen corresponding path program 9 times [2024-01-27 15:50:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:22,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40031959] [2024-01-27 15:50:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:22,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40031959] [2024-01-27 15:50:22,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40031959] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:22,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933362142] [2024-01-27 15:50:22,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:22,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:22,925 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:22,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 15:50:23,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:50:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:23,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:23,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:23,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933362142] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:23,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:23,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-27 15:50:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823850946] [2024-01-27 15:50:23,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:50:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:50:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:50:23,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:23,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 356 transitions, 5512 flow. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:23,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:23,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:23,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:23,733 INFO L124 PetriNetUnfolderBase]: 2203/3190 cut-off events. [2024-01-27 15:50:23,733 INFO L125 PetriNetUnfolderBase]: For 43901/43901 co-relation queries the response was YES. [2024-01-27 15:50:23,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25082 conditions, 3190 events. 2203/3190 cut-off events. For 43901/43901 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14206 event pairs, 451 based on Foata normal form. 26/3216 useless extension candidates. Maximal degree in co-relation 25016. Up to 1808 conditions per place. [2024-01-27 15:50:23,760 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 323 selfloop transitions, 150 changer transitions 0/474 dead transitions. [2024-01-27 15:50:23,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 474 transitions, 7748 flow [2024-01-27 15:50:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-01-27 15:50:23,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689655172413793 [2024-01-27 15:50:23,762 INFO L175 Difference]: Start difference. First operand has 180 places, 356 transitions, 5512 flow. Second operand 10 states and 107 transitions. [2024-01-27 15:50:23,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 474 transitions, 7748 flow [2024-01-27 15:50:23,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 474 transitions, 7360 flow, removed 115 selfloop flow, removed 6 redundant places. [2024-01-27 15:50:23,958 INFO L231 Difference]: Finished difference. Result has 184 places, 367 transitions, 5706 flow [2024-01-27 15:50:23,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5706, PETRI_PLACES=184, PETRI_TRANSITIONS=367} [2024-01-27 15:50:23,958 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-01-27 15:50:23,958 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 367 transitions, 5706 flow [2024-01-27 15:50:23,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:23,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:23,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:23,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:24,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:24,171 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:24,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1675623514, now seen corresponding path program 10 times [2024-01-27 15:50:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:24,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206322337] [2024-01-27 15:50:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206322337] [2024-01-27 15:50:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206322337] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031326134] [2024-01-27 15:50:24,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:24,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:24,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:24,260 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:24,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 15:50:24,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:24,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:24,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:24,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:24,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:24,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031326134] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:24,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:24,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-01-27 15:50:24,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748389056] [2024-01-27 15:50:24,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:50:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:50:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:50:24,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:24,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 367 transitions, 5706 flow. Second operand has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:24,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:24,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:24,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:25,544 INFO L124 PetriNetUnfolderBase]: 2567/3736 cut-off events. [2024-01-27 15:50:25,545 INFO L125 PetriNetUnfolderBase]: For 53193/53193 co-relation queries the response was YES. [2024-01-27 15:50:25,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29219 conditions, 3736 events. 2567/3736 cut-off events. For 53193/53193 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 17315 event pairs, 215 based on Foata normal form. 56/3792 useless extension candidates. Maximal degree in co-relation 29152. Up to 1040 conditions per place. [2024-01-27 15:50:25,581 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 339 selfloop transitions, 374 changer transitions 0/714 dead transitions. [2024-01-27 15:50:25,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 714 transitions, 11267 flow [2024-01-27 15:50:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:50:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:50:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 378 transitions. [2024-01-27 15:50:25,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-01-27 15:50:25,583 INFO L175 Difference]: Start difference. First operand has 184 places, 367 transitions, 5706 flow. Second operand 35 states and 378 transitions. [2024-01-27 15:50:25,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 714 transitions, 11267 flow [2024-01-27 15:50:25,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 714 transitions, 10901 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-27 15:50:25,827 INFO L231 Difference]: Finished difference. Result has 226 places, 523 transitions, 8877 flow [2024-01-27 15:50:25,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8877, PETRI_PLACES=226, PETRI_TRANSITIONS=523} [2024-01-27 15:50:25,827 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2024-01-27 15:50:25,828 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 523 transitions, 8877 flow [2024-01-27 15:50:25,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:25,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:25,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:25,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:26,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-27 15:50:26,040 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:26,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -82285462, now seen corresponding path program 11 times [2024-01-27 15:50:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:26,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917562075] [2024-01-27 15:50:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:26,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:26,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917562075] [2024-01-27 15:50:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917562075] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112344246] [2024-01-27 15:50:26,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:26,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:26,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:26,129 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:26,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 15:50:26,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:26,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:26,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:26,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:26,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112344246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:26,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:26,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-01-27 15:50:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734108380] [2024-01-27 15:50:26,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:26,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:50:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:50:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:50:26,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:26,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 523 transitions, 8877 flow. Second operand has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:26,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:26,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:26,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:27,721 INFO L124 PetriNetUnfolderBase]: 2749/4046 cut-off events. [2024-01-27 15:50:27,722 INFO L125 PetriNetUnfolderBase]: For 77114/77114 co-relation queries the response was YES. [2024-01-27 15:50:27,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35274 conditions, 4046 events. 2749/4046 cut-off events. For 77114/77114 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 19452 event pairs, 201 based on Foata normal form. 54/4100 useless extension candidates. Maximal degree in co-relation 35192. Up to 1127 conditions per place. [2024-01-27 15:50:27,753 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 356 selfloop transitions, 476 changer transitions 0/833 dead transitions. [2024-01-27 15:50:27,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 833 transitions, 14369 flow [2024-01-27 15:50:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:50:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:50:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 390 transitions. [2024-01-27 15:50:27,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35390199637023595 [2024-01-27 15:50:27,754 INFO L175 Difference]: Start difference. First operand has 226 places, 523 transitions, 8877 flow. Second operand 38 states and 390 transitions. [2024-01-27 15:50:27,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 833 transitions, 14369 flow [2024-01-27 15:50:28,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 833 transitions, 13127 flow, removed 321 selfloop flow, removed 12 redundant places. [2024-01-27 15:50:28,167 INFO L231 Difference]: Finished difference. Result has 263 places, 655 transitions, 11290 flow [2024-01-27 15:50:28,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7776, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11290, PETRI_PLACES=263, PETRI_TRANSITIONS=655} [2024-01-27 15:50:28,167 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 232 predicate places. [2024-01-27 15:50:28,168 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 655 transitions, 11290 flow [2024-01-27 15:50:28,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:28,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:28,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:28,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:28,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 15:50:28,379 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:28,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash 286886357, now seen corresponding path program 11 times [2024-01-27 15:50:28,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:28,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566951915] [2024-01-27 15:50:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:28,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:28,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566951915] [2024-01-27 15:50:28,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566951915] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:28,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078611014] [2024-01-27 15:50:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:28,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:28,530 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:28,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 15:50:28,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:28,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:28,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:28,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:28,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078611014] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:28,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:28,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-27 15:50:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715615233] [2024-01-27 15:50:28,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:28,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:28,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:28,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 655 transitions, 11290 flow. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:28,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:28,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:28,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:30,634 INFO L124 PetriNetUnfolderBase]: 3858/5617 cut-off events. [2024-01-27 15:50:30,634 INFO L125 PetriNetUnfolderBase]: For 124701/124701 co-relation queries the response was YES. [2024-01-27 15:50:30,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52493 conditions, 5617 events. 3858/5617 cut-off events. For 124701/124701 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27898 event pairs, 171 based on Foata normal form. 58/5675 useless extension candidates. Maximal degree in co-relation 52400. Up to 1777 conditions per place. [2024-01-27 15:50:30,693 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 428 selfloop transitions, 613 changer transitions 0/1042 dead transitions. [2024-01-27 15:50:30,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1042 transitions, 18704 flow [2024-01-27 15:50:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:50:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:50:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 480 transitions. [2024-01-27 15:50:30,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761755485893417 [2024-01-27 15:50:30,696 INFO L175 Difference]: Start difference. First operand has 263 places, 655 transitions, 11290 flow. Second operand 44 states and 480 transitions. [2024-01-27 15:50:30,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1042 transitions, 18704 flow [2024-01-27 15:50:31,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1042 transitions, 17600 flow, removed 490 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:31,593 INFO L231 Difference]: Finished difference. Result has 306 places, 803 transitions, 14666 flow [2024-01-27 15:50:31,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10238, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14666, PETRI_PLACES=306, PETRI_TRANSITIONS=803} [2024-01-27 15:50:31,595 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 275 predicate places. [2024-01-27 15:50:31,595 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 803 transitions, 14666 flow [2024-01-27 15:50:31,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:31,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:31,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:31,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-01-27 15:50:31,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-27 15:50:31,804 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:31,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2088012163, now seen corresponding path program 12 times [2024-01-27 15:50:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899024738] [2024-01-27 15:50:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:31,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:31,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899024738] [2024-01-27 15:50:31,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899024738] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204923437] [2024-01-27 15:50:31,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:31,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:31,906 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:31,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 15:50:32,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:50:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:32,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:32,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:32,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:32,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204923437] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:32,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:32,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:50:32,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711524814] [2024-01-27 15:50:32,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:32,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:32,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:32,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 803 transitions, 14666 flow. Second operand has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:32,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:32,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:32,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:33,574 INFO L124 PetriNetUnfolderBase]: 3833/5571 cut-off events. [2024-01-27 15:50:33,574 INFO L125 PetriNetUnfolderBase]: For 109662/109662 co-relation queries the response was YES. [2024-01-27 15:50:33,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51816 conditions, 5571 events. 3833/5571 cut-off events. For 109662/109662 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27468 event pairs, 381 based on Foata normal form. 18/5589 useless extension candidates. Maximal degree in co-relation 51714. Up to 1754 conditions per place. [2024-01-27 15:50:33,627 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 618 selfloop transitions, 361 changer transitions 0/980 dead transitions. [2024-01-27 15:50:33,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 980 transitions, 18337 flow [2024-01-27 15:50:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:50:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:50:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 241 transitions. [2024-01-27 15:50:33,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43738656987295826 [2024-01-27 15:50:33,629 INFO L175 Difference]: Start difference. First operand has 306 places, 803 transitions, 14666 flow. Second operand 19 states and 241 transitions. [2024-01-27 15:50:33,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 980 transitions, 18337 flow [2024-01-27 15:50:34,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 980 transitions, 16671 flow, removed 582 selfloop flow, removed 16 redundant places. [2024-01-27 15:50:34,530 INFO L231 Difference]: Finished difference. Result has 309 places, 796 transitions, 13653 flow [2024-01-27 15:50:34,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12788, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13653, PETRI_PLACES=309, PETRI_TRANSITIONS=796} [2024-01-27 15:50:34,532 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 278 predicate places. [2024-01-27 15:50:34,532 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 796 transitions, 13653 flow [2024-01-27 15:50:34,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:34,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:34,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:34,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-27 15:50:34,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 15:50:34,744 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:34,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:34,749 INFO L85 PathProgramCache]: Analyzing trace with hash 687570551, now seen corresponding path program 13 times [2024-01-27 15:50:34,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:34,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243198582] [2024-01-27 15:50:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:34,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243198582] [2024-01-27 15:50:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243198582] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862986432] [2024-01-27 15:50:34,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:34,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:34,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:34,841 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:34,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 15:50:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:34,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:34,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:35,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:35,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862986432] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:35,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:35,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:50:35,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926764943] [2024-01-27 15:50:35,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:35,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:50:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:50:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:50:35,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:35,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 796 transitions, 13653 flow. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:35,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:35,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:35,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:36,309 INFO L124 PetriNetUnfolderBase]: 3902/5693 cut-off events. [2024-01-27 15:50:36,309 INFO L125 PetriNetUnfolderBase]: For 77938/77938 co-relation queries the response was YES. [2024-01-27 15:50:36,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46225 conditions, 5693 events. 3902/5693 cut-off events. For 77938/77938 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28293 event pairs, 497 based on Foata normal form. 16/5709 useless extension candidates. Maximal degree in co-relation 46126. Up to 2214 conditions per place. [2024-01-27 15:50:36,365 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 606 selfloop transitions, 272 changer transitions 0/879 dead transitions. [2024-01-27 15:50:36,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 879 transitions, 16298 flow [2024-01-27 15:50:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-01-27 15:50:36,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-01-27 15:50:36,366 INFO L175 Difference]: Start difference. First operand has 309 places, 796 transitions, 13653 flow. Second operand 10 states and 113 transitions. [2024-01-27 15:50:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 879 transitions, 16298 flow [2024-01-27 15:50:37,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 879 transitions, 15540 flow, removed 3 selfloop flow, removed 19 redundant places. [2024-01-27 15:50:37,066 INFO L231 Difference]: Finished difference. Result has 298 places, 789 transitions, 13281 flow [2024-01-27 15:50:37,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12737, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13281, PETRI_PLACES=298, PETRI_TRANSITIONS=789} [2024-01-27 15:50:37,068 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 267 predicate places. [2024-01-27 15:50:37,068 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 789 transitions, 13281 flow [2024-01-27 15:50:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:37,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:37,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:37,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-27 15:50:37,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:37,280 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:37,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1161784887, now seen corresponding path program 14 times [2024-01-27 15:50:37,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:37,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516070711] [2024-01-27 15:50:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:37,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:37,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:37,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516070711] [2024-01-27 15:50:37,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516070711] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:37,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673782914] [2024-01-27 15:50:37,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:37,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:37,369 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:37,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 15:50:37,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:37,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:37,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:37,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:37,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:37,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673782914] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:37,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:37,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-01-27 15:50:37,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957493816] [2024-01-27 15:50:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:37,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:37,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 789 transitions, 13281 flow. Second operand has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:37,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:37,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:37,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:38,874 INFO L124 PetriNetUnfolderBase]: 3927/5736 cut-off events. [2024-01-27 15:50:38,874 INFO L125 PetriNetUnfolderBase]: For 78401/78401 co-relation queries the response was YES. [2024-01-27 15:50:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46052 conditions, 5736 events. 3927/5736 cut-off events. For 78401/78401 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 28523 event pairs, 850 based on Foata normal form. 18/5754 useless extension candidates. Maximal degree in co-relation 45956. Up to 3861 conditions per place. [2024-01-27 15:50:38,944 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 644 selfloop transitions, 236 changer transitions 0/881 dead transitions. [2024-01-27 15:50:38,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 881 transitions, 15960 flow [2024-01-27 15:50:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:50:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:50:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-01-27 15:50:38,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-01-27 15:50:38,945 INFO L175 Difference]: Start difference. First operand has 298 places, 789 transitions, 13281 flow. Second operand 12 states and 136 transitions. [2024-01-27 15:50:38,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 881 transitions, 15960 flow [2024-01-27 15:50:39,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 881 transitions, 15484 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:50:39,557 INFO L231 Difference]: Finished difference. Result has 302 places, 792 transitions, 13355 flow [2024-01-27 15:50:39,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12811, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13355, PETRI_PLACES=302, PETRI_TRANSITIONS=792} [2024-01-27 15:50:39,559 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2024-01-27 15:50:39,559 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 792 transitions, 13355 flow [2024-01-27 15:50:39,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:39,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:39,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:39,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:39,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-27 15:50:39,778 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:39,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash 214957492, now seen corresponding path program 12 times [2024-01-27 15:50:39,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:39,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228060582] [2024-01-27 15:50:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:39,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228060582] [2024-01-27 15:50:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228060582] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784777176] [2024-01-27 15:50:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:39,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:39,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:39,857 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:39,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-27 15:50:39,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:50:39,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:39,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:39,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:40,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784777176] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:40,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:40,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:50:40,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060081714] [2024-01-27 15:50:40,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:40,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:40,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:40,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:40,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 792 transitions, 13355 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:40,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:40,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:40,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:41,397 INFO L124 PetriNetUnfolderBase]: 3889/5667 cut-off events. [2024-01-27 15:50:41,397 INFO L125 PetriNetUnfolderBase]: For 78741/78741 co-relation queries the response was YES. [2024-01-27 15:50:41,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45742 conditions, 5667 events. 3889/5667 cut-off events. For 78741/78741 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27936 event pairs, 873 based on Foata normal form. 26/5693 useless extension candidates. Maximal degree in co-relation 45645. Up to 3908 conditions per place. [2024-01-27 15:50:41,455 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 637 selfloop transitions, 245 changer transitions 0/883 dead transitions. [2024-01-27 15:50:41,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 883 transitions, 15938 flow [2024-01-27 15:50:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:50:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:50:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-01-27 15:50:41,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-01-27 15:50:41,456 INFO L175 Difference]: Start difference. First operand has 302 places, 792 transitions, 13355 flow. Second operand 13 states and 145 transitions. [2024-01-27 15:50:41,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 883 transitions, 15938 flow [2024-01-27 15:50:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 883 transitions, 15379 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-27 15:50:42,094 INFO L231 Difference]: Finished difference. Result has 302 places, 784 transitions, 13157 flow [2024-01-27 15:50:42,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12667, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13157, PETRI_PLACES=302, PETRI_TRANSITIONS=784} [2024-01-27 15:50:42,094 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2024-01-27 15:50:42,095 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 784 transitions, 13157 flow [2024-01-27 15:50:42,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:42,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:42,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:42,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:42,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-27 15:50:42,308 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:42,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash 471909802, now seen corresponding path program 13 times [2024-01-27 15:50:42,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:42,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174265195] [2024-01-27 15:50:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:42,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:42,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174265195] [2024-01-27 15:50:42,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174265195] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:42,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411881443] [2024-01-27 15:50:42,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:42,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:42,404 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:42,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-27 15:50:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:42,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:42,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:42,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:42,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411881443] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:42,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:42,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-01-27 15:50:42,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614854318] [2024-01-27 15:50:42,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:42,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:50:42,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:50:42,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:50:42,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:42,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 784 transitions, 13157 flow. Second operand has 21 states, 21 states have (on average 6.095238095238095) internal successors, (128), 21 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:42,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:42,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:42,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:43,889 INFO L124 PetriNetUnfolderBase]: 3851/5598 cut-off events. [2024-01-27 15:50:43,894 INFO L125 PetriNetUnfolderBase]: For 77579/77579 co-relation queries the response was YES. [2024-01-27 15:50:43,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45033 conditions, 5598 events. 3851/5598 cut-off events. For 77579/77579 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 27408 event pairs, 1019 based on Foata normal form. 26/5624 useless extension candidates. Maximal degree in co-relation 44936. Up to 4712 conditions per place. [2024-01-27 15:50:43,949 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 668 selfloop transitions, 173 changer transitions 0/842 dead transitions. [2024-01-27 15:50:43,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 842 transitions, 15374 flow [2024-01-27 15:50:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:50:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:50:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-01-27 15:50:43,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-01-27 15:50:43,950 INFO L175 Difference]: Start difference. First operand has 302 places, 784 transitions, 13157 flow. Second operand 11 states and 117 transitions. [2024-01-27 15:50:43,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 842 transitions, 15374 flow [2024-01-27 15:50:44,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 842 transitions, 14829 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-01-27 15:50:44,564 INFO L231 Difference]: Finished difference. Result has 299 places, 792 transitions, 13105 flow [2024-01-27 15:50:44,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12542, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13105, PETRI_PLACES=299, PETRI_TRANSITIONS=792} [2024-01-27 15:50:44,565 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 268 predicate places. [2024-01-27 15:50:44,565 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 792 transitions, 13105 flow [2024-01-27 15:50:44,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.095238095238095) internal successors, (128), 21 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:44,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:44,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:44,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:44,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-01-27 15:50:44,769 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:44,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash 665409197, now seen corresponding path program 15 times [2024-01-27 15:50:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978805240] [2024-01-27 15:50:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:44,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978805240] [2024-01-27 15:50:44,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978805240] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158639322] [2024-01-27 15:50:44,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:44,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:44,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:44,859 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:44,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-27 15:50:44,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:50:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:44,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:44,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:45,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:45,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158639322] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:45,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:45,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-01-27 15:50:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548739793] [2024-01-27 15:50:45,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:45,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:45,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:45,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:45,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 792 transitions, 13105 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:45,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:45,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:45,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:46,291 INFO L124 PetriNetUnfolderBase]: 3826/5552 cut-off events. [2024-01-27 15:50:46,292 INFO L125 PetriNetUnfolderBase]: For 78726/78726 co-relation queries the response was YES. [2024-01-27 15:50:46,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44836 conditions, 5552 events. 3826/5552 cut-off events. For 78726/78726 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27095 event pairs, 1017 based on Foata normal form. 18/5570 useless extension candidates. Maximal degree in co-relation 44741. Up to 4676 conditions per place. [2024-01-27 15:50:46,346 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 678 selfloop transitions, 164 changer transitions 0/843 dead transitions. [2024-01-27 15:50:46,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 843 transitions, 15276 flow [2024-01-27 15:50:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:50:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:50:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-01-27 15:50:46,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-01-27 15:50:46,347 INFO L175 Difference]: Start difference. First operand has 299 places, 792 transitions, 13105 flow. Second operand 11 states and 119 transitions. [2024-01-27 15:50:46,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 843 transitions, 15276 flow [2024-01-27 15:50:46,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 843 transitions, 14878 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:46,931 INFO L231 Difference]: Finished difference. Result has 301 places, 791 transitions, 13031 flow [2024-01-27 15:50:46,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12625, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13031, PETRI_PLACES=301, PETRI_TRANSITIONS=791} [2024-01-27 15:50:46,932 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 270 predicate places. [2024-01-27 15:50:46,932 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 791 transitions, 13031 flow [2024-01-27 15:50:46,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:46,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:46,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:46,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-01-27 15:50:47,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:47,144 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:47,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1878995470, now seen corresponding path program 14 times [2024-01-27 15:50:47,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:47,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848032010] [2024-01-27 15:50:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:47,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848032010] [2024-01-27 15:50:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848032010] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794140203] [2024-01-27 15:50:47,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:47,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:47,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:47,237 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:47,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-27 15:50:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:47,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:47,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:47,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794140203] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:47,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-01-27 15:50:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314909461] [2024-01-27 15:50:47,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:50:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:50:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:50:47,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:47,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 791 transitions, 13031 flow. Second operand has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:47,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:47,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:47,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:49,113 INFO L124 PetriNetUnfolderBase]: 3997/5782 cut-off events. [2024-01-27 15:50:49,114 INFO L125 PetriNetUnfolderBase]: For 80512/80512 co-relation queries the response was YES. [2024-01-27 15:50:49,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46530 conditions, 5782 events. 3997/5782 cut-off events. For 80512/80512 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28307 event pairs, 980 based on Foata normal form. 42/5824 useless extension candidates. Maximal degree in co-relation 46434. Up to 4637 conditions per place. [2024-01-27 15:50:49,183 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 694 selfloop transitions, 244 changer transitions 0/939 dead transitions. [2024-01-27 15:50:49,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 939 transitions, 16505 flow [2024-01-27 15:50:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:50:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:50:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-01-27 15:50:49,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866995073891626 [2024-01-27 15:50:49,184 INFO L175 Difference]: Start difference. First operand has 301 places, 791 transitions, 13031 flow. Second operand 14 states and 157 transitions. [2024-01-27 15:50:49,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 939 transitions, 16505 flow [2024-01-27 15:50:49,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 939 transitions, 16167 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:49,901 INFO L231 Difference]: Finished difference. Result has 308 places, 840 transitions, 13962 flow [2024-01-27 15:50:49,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12567, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13962, PETRI_PLACES=308, PETRI_TRANSITIONS=840} [2024-01-27 15:50:49,902 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 277 predicate places. [2024-01-27 15:50:49,902 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 840 transitions, 13962 flow [2024-01-27 15:50:49,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:49,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:49,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:49,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:50,114 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:50,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1321880238, now seen corresponding path program 15 times [2024-01-27 15:50:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704374806] [2024-01-27 15:50:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:50,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704374806] [2024-01-27 15:50:50,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704374806] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697962895] [2024-01-27 15:50:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:50,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:50,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:50,199 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:50,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-27 15:50:50,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:50:50,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:50,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:50:50,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:50,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697962895] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:50,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:50,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-01-27 15:50:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110275688] [2024-01-27 15:50:50,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:50,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:50,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:50,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:50,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 840 transitions, 13962 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:50,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:50,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:50,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:51,839 INFO L124 PetriNetUnfolderBase]: 3959/5713 cut-off events. [2024-01-27 15:50:51,839 INFO L125 PetriNetUnfolderBase]: For 79459/79459 co-relation queries the response was YES. [2024-01-27 15:50:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46784 conditions, 5713 events. 3959/5713 cut-off events. For 79459/79459 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27961 event pairs, 645 based on Foata normal form. 26/5739 useless extension candidates. Maximal degree in co-relation 46685. Up to 3448 conditions per place. [2024-01-27 15:50:51,898 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 596 selfloop transitions, 375 changer transitions 0/972 dead transitions. [2024-01-27 15:50:51,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 972 transitions, 17101 flow [2024-01-27 15:50:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:50:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:50:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 173 transitions. [2024-01-27 15:50:51,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39770114942528734 [2024-01-27 15:50:51,900 INFO L175 Difference]: Start difference. First operand has 308 places, 840 transitions, 13962 flow. Second operand 15 states and 173 transitions. [2024-01-27 15:50:51,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 972 transitions, 17101 flow [2024-01-27 15:50:52,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 972 transitions, 16739 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:52,546 INFO L231 Difference]: Finished difference. Result has 313 places, 832 transitions, 14226 flow [2024-01-27 15:50:52,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13476, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14226, PETRI_PLACES=313, PETRI_TRANSITIONS=832} [2024-01-27 15:50:52,547 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 282 predicate places. [2024-01-27 15:50:52,548 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 832 transitions, 14226 flow [2024-01-27 15:50:52,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:52,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:52,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:52,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:52,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-27 15:50:52,754 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:52,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1997700442, now seen corresponding path program 7 times [2024-01-27 15:50:52,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:52,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335258401] [2024-01-27 15:50:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:52,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:53,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335258401] [2024-01-27 15:50:53,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335258401] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216712376] [2024-01-27 15:50:53,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:53,239 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:53,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-27 15:50:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:53,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-27 15:50:53,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:53,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:53,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:53,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-01-27 15:50:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:53,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:54,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-01-27 15:50:54,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:54,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 218 [2024-01-27 15:50:59,063 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:00,480 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:01,044 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-01-27 15:51:01,777 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:03,087 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:04,251 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-01-27 15:51:04,717 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-01-27 15:51:07,097 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:07,285 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:13,209 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216712376] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:15,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:15,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-01-27 15:51:15,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592576465] [2024-01-27 15:51:15,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:15,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:51:15,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:15,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:51:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:51:15,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:15,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 832 transitions, 14226 flow. Second operand has 35 states, 35 states have (on average 6.228571428571429) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:15,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:15,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:15,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:18,501 INFO L124 PetriNetUnfolderBase]: 5403/7803 cut-off events. [2024-01-27 15:51:18,502 INFO L125 PetriNetUnfolderBase]: For 108793/108793 co-relation queries the response was YES. [2024-01-27 15:51:18,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66318 conditions, 7803 events. 5403/7803 cut-off events. For 108793/108793 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 40075 event pairs, 375 based on Foata normal form. 2/7805 useless extension candidates. Maximal degree in co-relation 66219. Up to 6162 conditions per place. [2024-01-27 15:51:18,789 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 991 selfloop transitions, 442 changer transitions 7/1441 dead transitions. [2024-01-27 15:51:18,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1441 transitions, 27275 flow [2024-01-27 15:51:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:51:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:51:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 286 transitions. [2024-01-27 15:51:18,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49310344827586206 [2024-01-27 15:51:18,791 INFO L175 Difference]: Start difference. First operand has 313 places, 832 transitions, 14226 flow. Second operand 20 states and 286 transitions. [2024-01-27 15:51:18,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1441 transitions, 27275 flow [2024-01-27 15:51:19,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1441 transitions, 26193 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-01-27 15:51:19,705 INFO L231 Difference]: Finished difference. Result has 332 places, 1194 transitions, 21959 flow [2024-01-27 15:51:19,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13580, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21959, PETRI_PLACES=332, PETRI_TRANSITIONS=1194} [2024-01-27 15:51:19,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 301 predicate places. [2024-01-27 15:51:19,706 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1194 transitions, 21959 flow [2024-01-27 15:51:19,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.228571428571429) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:19,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:19,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:19,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-01-27 15:51:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-27 15:51:19,919 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:19,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash -663663362, now seen corresponding path program 8 times [2024-01-27 15:51:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:19,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339242317] [2024-01-27 15:51:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339242317] [2024-01-27 15:51:20,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339242317] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:20,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072685545] [2024-01-27 15:51:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:51:20,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:20,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:20,457 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-27 15:51:20,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:51:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:20,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-27 15:51:20,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:20,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:51:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:51:20,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:51:20,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2024-01-27 15:51:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:20,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:51:21,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072685545] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:21,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:21,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 32 [2024-01-27 15:51:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298821311] [2024-01-27 15:51:21,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:21,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:51:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:51:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:51:21,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:21,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1194 transitions, 21959 flow. Second operand has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:21,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:21,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:21,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:25,438 INFO L124 PetriNetUnfolderBase]: 6521/9447 cut-off events. [2024-01-27 15:51:25,438 INFO L125 PetriNetUnfolderBase]: For 145305/145305 co-relation queries the response was YES. [2024-01-27 15:51:25,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82585 conditions, 9447 events. 6521/9447 cut-off events. For 145305/145305 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 50492 event pairs, 374 based on Foata normal form. 3/9450 useless extension candidates. Maximal degree in co-relation 82473. Up to 6958 conditions per place. [2024-01-27 15:51:25,535 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 1182 selfloop transitions, 613 changer transitions 8/1804 dead transitions. [2024-01-27 15:51:25,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1804 transitions, 34602 flow [2024-01-27 15:51:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:51:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:51:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 490 transitions. [2024-01-27 15:51:25,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46934865900383144 [2024-01-27 15:51:25,561 INFO L175 Difference]: Start difference. First operand has 332 places, 1194 transitions, 21959 flow. Second operand 36 states and 490 transitions. [2024-01-27 15:51:25,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1804 transitions, 34602 flow [2024-01-27 15:51:27,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1804 transitions, 33408 flow, removed 595 selfloop flow, removed 2 redundant places. [2024-01-27 15:51:27,401 INFO L231 Difference]: Finished difference. Result has 374 places, 1448 transitions, 27298 flow [2024-01-27 15:51:27,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=20985, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=27298, PETRI_PLACES=374, PETRI_TRANSITIONS=1448} [2024-01-27 15:51:27,402 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 343 predicate places. [2024-01-27 15:51:27,402 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1448 transitions, 27298 flow [2024-01-27 15:51:27,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:27,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:27,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:27,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-27 15:51:27,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-27 15:51:27,614 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -605989494, now seen corresponding path program 9 times [2024-01-27 15:51:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493220779] [2024-01-27 15:51:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:28,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493220779] [2024-01-27 15:51:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493220779] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064077760] [2024-01-27 15:51:28,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:51:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:28,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:28,184 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:28,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-27 15:51:28,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:51:28,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:28,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-27 15:51:28,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:28,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:51:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:51:28,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:51:28,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2024-01-27 15:51:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:28,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:51:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064077760] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:29,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:29,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 32 [2024-01-27 15:51:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412924052] [2024-01-27 15:51:29,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:29,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:51:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:51:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:51:29,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:29,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1448 transitions, 27298 flow. Second operand has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:29,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:29,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:29,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:33,030 INFO L124 PetriNetUnfolderBase]: 7024/10190 cut-off events. [2024-01-27 15:51:33,030 INFO L125 PetriNetUnfolderBase]: For 162944/162944 co-relation queries the response was YES. [2024-01-27 15:51:33,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90173 conditions, 10190 events. 7024/10190 cut-off events. For 162944/162944 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 55255 event pairs, 404 based on Foata normal form. 2/10192 useless extension candidates. Maximal degree in co-relation 90051. Up to 7867 conditions per place. [2024-01-27 15:51:33,175 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 1270 selfloop transitions, 585 changer transitions 2/1858 dead transitions. [2024-01-27 15:51:33,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1858 transitions, 36846 flow [2024-01-27 15:51:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:51:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:51:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 444 transitions. [2024-01-27 15:51:33,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47844827586206895 [2024-01-27 15:51:33,177 INFO L175 Difference]: Start difference. First operand has 374 places, 1448 transitions, 27298 flow. Second operand 32 states and 444 transitions. [2024-01-27 15:51:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1858 transitions, 36846 flow [2024-01-27 15:51:36,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1858 transitions, 34658 flow, removed 998 selfloop flow, removed 8 redundant places. [2024-01-27 15:51:36,113 INFO L231 Difference]: Finished difference. Result has 413 places, 1554 transitions, 28688 flow [2024-01-27 15:51:36,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=25320, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=28688, PETRI_PLACES=413, PETRI_TRANSITIONS=1554} [2024-01-27 15:51:36,114 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 382 predicate places. [2024-01-27 15:51:36,114 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1554 transitions, 28688 flow [2024-01-27 15:51:36,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:36,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:36,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:36,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:36,322 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -90225706, now seen corresponding path program 10 times [2024-01-27 15:51:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218399594] [2024-01-27 15:51:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218399594] [2024-01-27 15:51:36,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218399594] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060670027] [2024-01-27 15:51:36,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:51:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:36,972 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:36,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-27 15:51:37,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:51:37,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:37,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-27 15:51:37,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:37,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:51:37,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:51:37,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-01-27 15:51:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:37,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:38,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:51:38,131 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-01-27 15:51:38,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 194 [2024-01-27 15:51:39,064 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:39,364 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:39,490 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:39,595 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-01-27 15:51:39,647 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:39,929 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:52,813 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:52,892 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:55,576 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:51:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:58,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060670027] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:58,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:58,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-01-27 15:51:58,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076940181] [2024-01-27 15:51:58,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:51:58,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:51:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:51:58,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:58,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1554 transitions, 28688 flow. Second operand has 35 states, 35 states have (on average 6.228571428571429) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:58,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:58,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:58,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:02,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:52:08,727 INFO L124 PetriNetUnfolderBase]: 8454/12179 cut-off events. [2024-01-27 15:52:08,727 INFO L125 PetriNetUnfolderBase]: For 203072/203072 co-relation queries the response was YES. [2024-01-27 15:52:08,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108212 conditions, 12179 events. 8454/12179 cut-off events. For 203072/203072 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 66742 event pairs, 529 based on Foata normal form. 5/12184 useless extension candidates. Maximal degree in co-relation 108074. Up to 8937 conditions per place. [2024-01-27 15:52:08,867 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 1371 selfloop transitions, 807 changer transitions 7/2186 dead transitions. [2024-01-27 15:52:08,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 2186 transitions, 42931 flow [2024-01-27 15:52:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:52:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:52:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 483 transitions. [2024-01-27 15:52:08,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2024-01-27 15:52:08,869 INFO L175 Difference]: Start difference. First operand has 413 places, 1554 transitions, 28688 flow. Second operand 35 states and 483 transitions. [2024-01-27 15:52:08,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 2186 transitions, 42931 flow [2024-01-27 15:52:11,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 2186 transitions, 41678 flow, removed 268 selfloop flow, removed 15 redundant places. [2024-01-27 15:52:11,804 INFO L231 Difference]: Finished difference. Result has 449 places, 1862 transitions, 35843 flow [2024-01-27 15:52:11,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=27633, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=35843, PETRI_PLACES=449, PETRI_TRANSITIONS=1862} [2024-01-27 15:52:11,805 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 418 predicate places. [2024-01-27 15:52:11,806 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1862 transitions, 35843 flow [2024-01-27 15:52:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.228571428571429) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:11,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:11,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:11,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:12,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:12,012 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:12,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2027417248, now seen corresponding path program 11 times [2024-01-27 15:52:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:12,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66983766] [2024-01-27 15:52:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:12,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66983766] [2024-01-27 15:52:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66983766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403464626] [2024-01-27 15:52:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:52:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:12,578 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:12,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-27 15:52:12,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:52:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:12,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:52:12,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:12,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:52:12,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2024-01-27 15:52:13,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:52:13,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 28 [2024-01-27 15:52:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:13,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:14,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2024-01-27 15:52:14,080 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-01-27 15:52:14,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3646 treesize of output 3206 [2024-01-27 15:52:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403464626] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:20,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-01-27 15:52:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665322792] [2024-01-27 15:52:20,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:52:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:52:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:52:20,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:52:20,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1862 transitions, 35843 flow. Second operand has 35 states, 35 states have (on average 6.228571428571429) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:52:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:28,685 INFO L124 PetriNetUnfolderBase]: 9228/13291 cut-off events. [2024-01-27 15:52:28,685 INFO L125 PetriNetUnfolderBase]: For 241451/241451 co-relation queries the response was YES. [2024-01-27 15:52:28,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122470 conditions, 13291 events. 9228/13291 cut-off events. For 241451/241451 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 73735 event pairs, 571 based on Foata normal form. 6/13297 useless extension candidates. Maximal degree in co-relation 122314. Up to 10861 conditions per place. [2024-01-27 15:52:28,841 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 1668 selfloop transitions, 600 changer transitions 6/2275 dead transitions. [2024-01-27 15:52:28,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2275 transitions, 46189 flow [2024-01-27 15:52:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:52:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:52:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 426 transitions. [2024-01-27 15:52:28,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2024-01-27 15:52:28,843 INFO L175 Difference]: Start difference. First operand has 449 places, 1862 transitions, 35843 flow. Second operand 30 states and 426 transitions. [2024-01-27 15:52:28,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2275 transitions, 46189 flow [2024-01-27 15:52:33,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 2275 transitions, 44113 flow, removed 932 selfloop flow, removed 8 redundant places. [2024-01-27 15:52:33,707 INFO L231 Difference]: Finished difference. Result has 487 places, 1999 transitions, 38040 flow [2024-01-27 15:52:33,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=33923, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=38040, PETRI_PLACES=487, PETRI_TRANSITIONS=1999} [2024-01-27 15:52:33,712 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 456 predicate places. [2024-01-27 15:52:33,712 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1999 transitions, 38040 flow [2024-01-27 15:52:33,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.228571428571429) internal successors, (218), 35 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:33,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:33,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:33,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-01-27 15:52:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:33,925 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:33,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1470312652, now seen corresponding path program 12 times [2024-01-27 15:52:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:33,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442350513] [2024-01-27 15:52:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:34,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:34,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442350513] [2024-01-27 15:52:34,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442350513] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:34,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515531541] [2024-01-27 15:52:34,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:52:34,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:34,357 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:34,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-27 15:52:34,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:52:34,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:34,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-27 15:52:34,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:34,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:52:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:52:35,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:52:35,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2024-01-27 15:52:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:35,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:35,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:52:35,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:52:35,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 202 [2024-01-27 15:54:41,764 WARN L293 SmtUtils]: Spent 8.82s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:57:58,487 WARN L293 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:59:02,662 WARN L293 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:30,356 WARN L293 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:36,618 WARN L293 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:57,786 WARN L293 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15