./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:26:31,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:26:31,720 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:26:31,725 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:26:31,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:26:31,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:26:31,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:26:31,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:26:31,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:26:31,763 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:26:31,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:26:31,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:26:31,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:26:31,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:26:31,765 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:26:31,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:26:31,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:26:31,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:26:31,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:26:31,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:26:31,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:26:31,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:26:31,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:26:31,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:26:31,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:26:31,768 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:26:31,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:26:31,768 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:26:31,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:26:31,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:26:31,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:26:31,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:26:31,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:26:31,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:26:31,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:26:31,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:26:31,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:26:31,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:26:31,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:26:31,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:26:31,772 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:26:31,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:26:31,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:26:31,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:26:32,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:26:32,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:26:32,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:26:32,039 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:26:32,039 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:26:32,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-02-19 14:26:33,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:26:33,220 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:26:33,221 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-02-19 14:26:33,227 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83765a0b/9403b776e1bf41a6b75d184a8e91b7a5/FLAG88f600955 [2024-02-19 14:26:33,236 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c83765a0b/9403b776e1bf41a6b75d184a8e91b7a5 [2024-02-19 14:26:33,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:26:33,239 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:26:33,240 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:26:33,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:26:33,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:26:33,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620efab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33, skipping insertion in model container [2024-02-19 14:26:33,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,261 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:26:33,394 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/chl-chromosome-symm.wvr.c[2695,2708] [2024-02-19 14:26:33,401 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:26:33,413 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:26:33,427 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/chl-chromosome-symm.wvr.c[2695,2708] [2024-02-19 14:26:33,430 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:26:33,444 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:26:33,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33 WrapperNode [2024-02-19 14:26:33,444 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:26:33,445 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:26:33,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:26:33,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:26:33,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,491 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 199 [2024-02-19 14:26:33,492 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:26:33,493 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:26:33,493 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:26:33,493 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:26:33,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,505 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,524 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 6, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-02-19 14:26:33,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,551 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:26:33,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:26:33,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:26:33,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:26:33,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (1/1) ... [2024-02-19 14:26:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:26:33,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:33,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-19 14:26:33,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-19 14:26:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:26:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:26:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:26:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:26:33,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:26:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:26:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:26:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:26:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:26:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:26:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:26:33,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:26:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:26:33,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:26:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:26:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:26:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:26:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:26:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 14:26:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:26:33,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:26:33,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:26:33,636 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:26:33,763 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:26:33,765 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:26:34,100 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:26:34,101 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:26:34,330 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:26:34,331 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-19 14:26:34,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:26:34 BoogieIcfgContainer [2024-02-19 14:26:34,331 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:26:34,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:26:34,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:26:34,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:26:34,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:26:33" (1/3) ... [2024-02-19 14:26:34,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115f2cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:26:34, skipping insertion in model container [2024-02-19 14:26:34,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:26:33" (2/3) ... [2024-02-19 14:26:34,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115f2cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:26:34, skipping insertion in model container [2024-02-19 14:26:34,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:26:34" (3/3) ... [2024-02-19 14:26:34,340 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-02-19 14:26:34,354 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:26:34,354 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:26:34,354 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:26:34,398 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 14:26:34,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 60 flow [2024-02-19 14:26:34,452 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2024-02-19 14:26:34,452 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:26:34,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 4/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-02-19 14:26:34,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 60 flow [2024-02-19 14:26:34,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 20 transitions, 52 flow [2024-02-19 14:26:34,469 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:26:34,475 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45f17a7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:26:34,475 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:26:34,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:26:34,485 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2024-02-19 14:26:34,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:26:34,485 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:34,486 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:34,486 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:34,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1381292058, now seen corresponding path program 1 times [2024-02-19 14:26:34,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:34,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906909595] [2024-02-19 14:26:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:26:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906909595] [2024-02-19 14:26:34,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906909595] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:34,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:26:34,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:26:34,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691719382] [2024-02-19 14:26:34,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:34,817 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:26:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:26:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:26:34,872 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:34,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:34,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:34,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:34,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:34,983 INFO L124 PetriNetUnfolderBase]: 42/80 cut-off events. [2024-02-19 14:26:34,983 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 14:26:34,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 80 events. 42/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 120. Up to 78 conditions per place. [2024-02-19 14:26:34,985 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2024-02-19 14:26:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2024-02-19 14:26:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:26:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:26:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2024-02-19 14:26:34,994 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-02-19 14:26:34,997 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-02-19 14:26:34,997 INFO L507 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 98 flow [2024-02-19 14:26:34,997 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:34,997 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:34,997 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:34,998 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:26:34,998 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:34,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2073196592, now seen corresponding path program 1 times [2024-02-19 14:26:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:34,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814656707] [2024-02-19 14:26:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:34,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:26:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814656707] [2024-02-19 14:26:35,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814656707] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284926636] [2024-02-19 14:26:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:35,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:35,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:26:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:35,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:26:35,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:26:35,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:26:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284926636] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:35,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-19 14:26:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813661816] [2024-02-19 14:26:35,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:35,270 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 14:26:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 14:26:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-02-19 14:26:35,272 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:35,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:35,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:35,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:35,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:35,355 INFO L124 PetriNetUnfolderBase]: 42/86 cut-off events. [2024-02-19 14:26:35,355 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 14:26:35,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 86 events. 42/86 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 177. Up to 84 conditions per place. [2024-02-19 14:26:35,357 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2024-02-19 14:26:35,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 176 flow [2024-02-19 14:26:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:26:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:26:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 51 transitions. [2024-02-19 14:26:35,358 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-19 14:26:35,359 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2024-02-19 14:26:35,359 INFO L507 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 176 flow [2024-02-19 14:26:35,359 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:35,359 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:35,359 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:35,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:35,574 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:35,575 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:35,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 494032558, now seen corresponding path program 2 times [2024-02-19 14:26:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545811690] [2024-02-19 14:26:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 14:26:35,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:35,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545811690] [2024-02-19 14:26:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545811690] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:35,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068870110] [2024-02-19 14:26:35,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:26:35,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:35,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:26:35,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-19 14:26:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:35,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:26:35,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-02-19 14:26:35,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-19 14:26:35,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068870110] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:35,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-19 14:26:35,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-02-19 14:26:35,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865399715] [2024-02-19 14:26:35,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:35,850 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:26:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:26:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:26:35,851 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:35,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:35,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:35,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:35,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:35,919 INFO L124 PetriNetUnfolderBase]: 50/100 cut-off events. [2024-02-19 14:26:35,919 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-02-19 14:26:35,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 100 events. 50/100 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 203 event pairs, 2 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 288. Up to 98 conditions per place. [2024-02-19 14:26:35,921 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 34 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-02-19 14:26:35,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 332 flow [2024-02-19 14:26:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:26:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:26:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-02-19 14:26:35,922 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-02-19 14:26:35,923 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2024-02-19 14:26:35,923 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 40 transitions, 332 flow [2024-02-19 14:26:35,923 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:35,923 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:35,923 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:35,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:36,135 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-19 14:26:36,135 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:36,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1057328694, now seen corresponding path program 3 times [2024-02-19 14:26:36,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:36,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054043759] [2024-02-19 14:26:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 14:26:36,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054043759] [2024-02-19 14:26:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054043759] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:36,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786738611] [2024-02-19 14:26:36,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:26:36,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:36,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:36,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:36,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:26:36,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-02-19 14:26:36,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:36,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:26:36,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-02-19 14:26:36,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-19 14:26:36,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786738611] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:36,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-19 14:26:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-02-19 14:26:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822157137] [2024-02-19 14:26:36,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:36,436 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:26:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:26:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:26:36,437 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:36,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 40 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:36,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:36,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:36,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:36,498 INFO L124 PetriNetUnfolderBase]: 56/110 cut-off events. [2024-02-19 14:26:36,499 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-19 14:26:36,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 110 events. 56/110 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 409. Up to 108 conditions per place. [2024-02-19 14:26:36,500 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2024-02-19 14:26:36,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 523 flow [2024-02-19 14:26:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:26:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:26:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-02-19 14:26:36,501 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-02-19 14:26:36,501 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2024-02-19 14:26:36,502 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 51 transitions, 523 flow [2024-02-19 14:26:36,502 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:36,502 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:36,502 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:36,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-19 14:26:36,713 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:36,714 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:36,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash 355948800, now seen corresponding path program 1 times [2024-02-19 14:26:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:36,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387886377] [2024-02-19 14:26:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-19 14:26:36,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387886377] [2024-02-19 14:26:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387886377] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808857894] [2024-02-19 14:26:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:36,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:36,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:36,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:26:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:36,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 14:26:36,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-19 14:26:36,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-19 14:26:36,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808857894] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:36,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:36,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 14:26:36,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813270610] [2024-02-19 14:26:36,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:36,980 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:26:36,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:26:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:26:36,981 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:36,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 51 transitions, 523 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:36,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:36,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:36,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:37,033 INFO L124 PetriNetUnfolderBase]: 56/112 cut-off events. [2024-02-19 14:26:37,034 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-19 14:26:37,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 112 events. 56/112 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 490. Up to 110 conditions per place. [2024-02-19 14:26:37,035 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 40 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2024-02-19 14:26:37,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 647 flow [2024-02-19 14:26:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 14:26:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 14:26:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2024-02-19 14:26:37,036 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32298136645962733 [2024-02-19 14:26:37,037 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 19 predicate places. [2024-02-19 14:26:37,037 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 53 transitions, 647 flow [2024-02-19 14:26:37,037 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,037 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:37,037 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:37,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:37,249 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:37,249 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:37,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1839038306, now seen corresponding path program 2 times [2024-02-19 14:26:37,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:37,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884723557] [2024-02-19 14:26:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:37,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-19 14:26:37,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:37,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884723557] [2024-02-19 14:26:37,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884723557] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:37,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:26:37,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:26:37,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015659852] [2024-02-19 14:26:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:37,380 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:26:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:26:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:26:37,381 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:37,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 53 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:37,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:37,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:37,447 INFO L124 PetriNetUnfolderBase]: 88/175 cut-off events. [2024-02-19 14:26:37,447 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-02-19 14:26:37,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 175 events. 88/175 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 461 event pairs, 0 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 939. Up to 172 conditions per place. [2024-02-19 14:26:37,449 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 69 selfloop transitions, 8 changer transitions 6/84 dead transitions. [2024-02-19 14:26:37,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 84 transitions, 1203 flow [2024-02-19 14:26:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:26:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:26:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2024-02-19 14:26:37,450 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-02-19 14:26:37,450 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 22 predicate places. [2024-02-19 14:26:37,450 INFO L507 AbstractCegarLoop]: Abstraction has has 45 places, 84 transitions, 1203 flow [2024-02-19 14:26:37,451 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,451 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:37,451 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:37,451 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-19 14:26:37,451 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:37,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1506073622, now seen corresponding path program 3 times [2024-02-19 14:26:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:37,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590249758] [2024-02-19 14:26:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:37,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-19 14:26:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:37,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590249758] [2024-02-19 14:26:37,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590249758] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:37,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:26:37,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:26:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783829774] [2024-02-19 14:26:37,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:37,587 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:26:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:26:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:26:37,588 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:37,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 84 transitions, 1203 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:37,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:37,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:37,648 INFO L124 PetriNetUnfolderBase]: 73/145 cut-off events. [2024-02-19 14:26:37,648 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-19 14:26:37,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 145 events. 73/145 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 338 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 874. Up to 143 conditions per place. [2024-02-19 14:26:37,650 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 57 selfloop transitions, 7 changer transitions 6/71 dead transitions. [2024-02-19 14:26:37,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 1152 flow [2024-02-19 14:26:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:26:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:26:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-02-19 14:26:37,651 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 14:26:37,651 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2024-02-19 14:26:37,651 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 71 transitions, 1152 flow [2024-02-19 14:26:37,652 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,652 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:37,652 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:37,652 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-19 14:26:37,652 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:37,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash -737788137, now seen corresponding path program 1 times [2024-02-19 14:26:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683218360] [2024-02-19 14:26:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-19 14:26:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683218360] [2024-02-19 14:26:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683218360] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:37,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:26:37,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:26:37,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436038665] [2024-02-19 14:26:37,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:37,774 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:26:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:26:37,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:26:37,776 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:37,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 71 transitions, 1152 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:37,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:37,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:37,848 INFO L124 PetriNetUnfolderBase]: 99/194 cut-off events. [2024-02-19 14:26:37,849 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-02-19 14:26:37,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 194 events. 99/194 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 540 event pairs, 0 based on Foata normal form. 2/154 useless extension candidates. Maximal degree in co-relation 1375. Up to 191 conditions per place. [2024-02-19 14:26:37,851 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 77 selfloop transitions, 10 changer transitions 8/96 dead transitions. [2024-02-19 14:26:37,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 96 transitions, 1751 flow [2024-02-19 14:26:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:26:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:26:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-02-19 14:26:37,852 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-02-19 14:26:37,852 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-02-19 14:26:37,852 INFO L507 AbstractCegarLoop]: Abstraction has has 51 places, 96 transitions, 1751 flow [2024-02-19 14:26:37,852 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,852 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:37,852 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:37,853 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-19 14:26:37,853 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:37,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1750350151, now seen corresponding path program 2 times [2024-02-19 14:26:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:37,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351926110] [2024-02-19 14:26:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-19 14:26:37,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:37,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351926110] [2024-02-19 14:26:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351926110] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:26:37,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:26:37,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:26:37,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672416432] [2024-02-19 14:26:37,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:26:37,982 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:26:37,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:26:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:26:37,982 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:37,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 96 transitions, 1751 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:37,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:37,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:37,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:38,060 INFO L124 PetriNetUnfolderBase]: 88/172 cut-off events. [2024-02-19 14:26:38,060 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-19 14:26:38,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 172 events. 88/172 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 457 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 1336. Up to 170 conditions per place. [2024-02-19 14:26:38,062 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 67 selfloop transitions, 9 changer transitions 8/85 dead transitions. [2024-02-19 14:26:38,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 85 transitions, 1715 flow [2024-02-19 14:26:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:26:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:26:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-02-19 14:26:38,072 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 14:26:38,073 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 31 predicate places. [2024-02-19 14:26:38,073 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 85 transitions, 1715 flow [2024-02-19 14:26:38,073 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:38,073 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:38,073 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:38,073 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-19 14:26:38,073 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:38,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash -193047773, now seen corresponding path program 1 times [2024-02-19 14:26:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:38,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408302927] [2024-02-19 14:26:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:38,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:38,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408302927] [2024-02-19 14:26:38,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408302927] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:38,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452716043] [2024-02-19 14:26:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:38,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:38,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:38,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:26:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:38,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:26:38,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:38,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:38,949 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 27 treesize of output 23 [2024-02-19 14:26:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:38,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:39,309 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:26:39,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-02-19 14:26:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452716043] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:39,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-02-19 14:26:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541369070] [2024-02-19 14:26:39,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:39,343 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:26:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:26:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:26:39,344 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:39,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 85 transitions, 1715 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:39,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:39,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:39,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:39,837 INFO L124 PetriNetUnfolderBase]: 156/296 cut-off events. [2024-02-19 14:26:39,837 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-02-19 14:26:39,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 296 events. 156/296 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 971 event pairs, 0 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 2423. Up to 293 conditions per place. [2024-02-19 14:26:39,840 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 102 selfloop transitions, 32 changer transitions 10/145 dead transitions. [2024-02-19 14:26:39,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 145 transitions, 3233 flow [2024-02-19 14:26:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:26:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:26:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 116 transitions. [2024-02-19 14:26:39,841 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36024844720496896 [2024-02-19 14:26:39,841 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 44 predicate places. [2024-02-19 14:26:39,842 INFO L507 AbstractCegarLoop]: Abstraction has has 67 places, 145 transitions, 3233 flow [2024-02-19 14:26:39,842 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:39,842 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:39,842 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:39,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:40,053 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-19 14:26:40,054 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:40,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 451964109, now seen corresponding path program 2 times [2024-02-19 14:26:40,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:40,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610961002] [2024-02-19 14:26:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:40,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610961002] [2024-02-19 14:26:40,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610961002] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370689029] [2024-02-19 14:26:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:26:40,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:40,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:40,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:26:40,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:26:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:40,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:26:40,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:40,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:40,826 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 27 treesize of output 19 [2024-02-19 14:26:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:40,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:41,150 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:41,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:41,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370689029] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:41,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:41,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-02-19 14:26:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620558069] [2024-02-19 14:26:41,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:41,224 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-19 14:26:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-19 14:26:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-02-19 14:26:41,225 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:41,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 145 transitions, 3233 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 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) [2024-02-19 14:26:41,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:41,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:41,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:41,665 INFO L124 PetriNetUnfolderBase]: 178/340 cut-off events. [2024-02-19 14:26:41,665 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-02-19 14:26:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4111 conditions, 340 events. 178/340 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1205 event pairs, 0 based on Foata normal form. 2/266 useless extension candidates. Maximal degree in co-relation 2954. Up to 337 conditions per place. [2024-02-19 14:26:41,669 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 123 selfloop transitions, 24 changer transitions 14/162 dead transitions. [2024-02-19 14:26:41,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 162 transitions, 3941 flow [2024-02-19 14:26:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:26:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:26:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2024-02-19 14:26:41,671 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-19 14:26:41,671 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 55 predicate places. [2024-02-19 14:26:41,671 INFO L507 AbstractCegarLoop]: Abstraction has has 78 places, 162 transitions, 3941 flow [2024-02-19 14:26:41,671 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 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) [2024-02-19 14:26:41,671 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:41,672 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:41,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:41,883 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:41,884 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:41,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1812330923, now seen corresponding path program 3 times [2024-02-19 14:26:41,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:41,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122233155] [2024-02-19 14:26:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:41,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122233155] [2024-02-19 14:26:42,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122233155] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270338319] [2024-02-19 14:26:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:26:42,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:42,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:42,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 14:26:42,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:26:42,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:42,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:26:42,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:42,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:42,527 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 27 treesize of output 19 [2024-02-19 14:26:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:42,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:42,889 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:42,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:42,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270338319] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:42,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:42,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-02-19 14:26:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762057428] [2024-02-19 14:26:42,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:42,972 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:26:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:26:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:26:42,974 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:42,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 162 transitions, 3941 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:42,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:42,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:42,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:43,328 INFO L124 PetriNetUnfolderBase]: 200/379 cut-off events. [2024-02-19 14:26:43,329 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-19 14:26:43,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4960 conditions, 379 events. 200/379 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1406 event pairs, 0 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 3589. Up to 376 conditions per place. [2024-02-19 14:26:43,333 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 137 selfloop transitions, 24 changer transitions 15/177 dead transitions. [2024-02-19 14:26:43,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 177 transitions, 4659 flow [2024-02-19 14:26:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:26:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:26:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-02-19 14:26:43,334 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-02-19 14:26:43,336 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2024-02-19 14:26:43,336 INFO L507 AbstractCegarLoop]: Abstraction has has 89 places, 177 transitions, 4659 flow [2024-02-19 14:26:43,336 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:43,336 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:43,336 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:43,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-19 14:26:43,547 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:43,548 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:43,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1608895693, now seen corresponding path program 4 times [2024-02-19 14:26:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:43,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567113651] [2024-02-19 14:26:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:44,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:44,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567113651] [2024-02-19 14:26:44,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567113651] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296101998] [2024-02-19 14:26:44,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:26:44,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:44,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:44,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:44,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 14:26:44,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:26:44,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:44,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:26:44,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:44,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:44,202 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 27 treesize of output 23 [2024-02-19 14:26:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:44,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:44,523 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:44,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:44,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296101998] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:44,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:44,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-02-19 14:26:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964832406] [2024-02-19 14:26:44,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:44,611 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:26:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:26:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:26:44,612 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:44,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 177 transitions, 4659 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:44,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:44,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:44,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:44,997 INFO L124 PetriNetUnfolderBase]: 202/388 cut-off events. [2024-02-19 14:26:44,997 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-19 14:26:44,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5466 conditions, 388 events. 202/388 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1468 event pairs, 0 based on Foata normal form. 1/299 useless extension candidates. Maximal degree in co-relation 3948. Up to 385 conditions per place. [2024-02-19 14:26:45,001 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 139 selfloop transitions, 23 changer transitions 21/184 dead transitions. [2024-02-19 14:26:45,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 184 transitions, 5213 flow [2024-02-19 14:26:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:26:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:26:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-02-19 14:26:45,003 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-02-19 14:26:45,004 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 77 predicate places. [2024-02-19 14:26:45,004 INFO L507 AbstractCegarLoop]: Abstraction has has 100 places, 184 transitions, 5213 flow [2024-02-19 14:26:45,006 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:45,006 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:45,006 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:45,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:45,218 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-19 14:26:45,218 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:45,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1765026115, now seen corresponding path program 5 times [2024-02-19 14:26:45,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:45,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707437642] [2024-02-19 14:26:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:45,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707437642] [2024-02-19 14:26:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707437642] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17953739] [2024-02-19 14:26:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:26:45,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:45,699 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:45,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 14:26:45,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:26:45,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:45,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:26:45,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:45,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:45,968 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 27 treesize of output 23 [2024-02-19 14:26:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:45,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:46,288 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:46,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:46,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17953739] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:46,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:46,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-02-19 14:26:46,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536922903] [2024-02-19 14:26:46,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:46,369 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:26:46,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:26:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:26:46,371 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:46,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 184 transitions, 5213 flow. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:46,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:46,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:46,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:46,760 INFO L124 PetriNetUnfolderBase]: 224/427 cut-off events. [2024-02-19 14:26:46,760 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-02-19 14:26:46,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 427 events. 224/427 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1662 event pairs, 0 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 4679. Up to 424 conditions per place. [2024-02-19 14:26:46,765 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 144 selfloop transitions, 32 changer transitions 22/199 dead transitions. [2024-02-19 14:26:46,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 199 transitions, 6035 flow [2024-02-19 14:26:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:26:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:26:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2024-02-19 14:26:46,766 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3188405797101449 [2024-02-19 14:26:46,766 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 88 predicate places. [2024-02-19 14:26:46,766 INFO L507 AbstractCegarLoop]: Abstraction has has 111 places, 199 transitions, 6035 flow [2024-02-19 14:26:46,766 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:46,766 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:46,766 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:46,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:46,977 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-19 14:26:46,978 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:46,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash 945924361, now seen corresponding path program 6 times [2024-02-19 14:26:46,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:46,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407263686] [2024-02-19 14:26:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:46,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:26:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407263686] [2024-02-19 14:26:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407263686] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722410511] [2024-02-19 14:26:47,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:26:47,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:47,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:47,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:47,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 14:26:47,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:26:47,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:47,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:26:47,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:48,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:48,036 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 27 treesize of output 19 [2024-02-19 14:26:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:48,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:48,403 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:48,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722410511] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:48,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:48,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 26 [2024-02-19 14:26:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097916368] [2024-02-19 14:26:48,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:48,487 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:26:48,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:26:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:26:48,488 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:48,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 199 transitions, 6035 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:48,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:48,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:48,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:49,053 INFO L124 PetriNetUnfolderBase]: 226/436 cut-off events. [2024-02-19 14:26:49,053 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-02-19 14:26:49,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 436 events. 226/436 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1744 event pairs, 0 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 5086. Up to 433 conditions per place. [2024-02-19 14:26:49,058 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 139 selfloop transitions, 38 changer transitions 28/206 dead transitions. [2024-02-19 14:26:49,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 206 transitions, 6661 flow [2024-02-19 14:26:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:26:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:26:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 106 transitions. [2024-02-19 14:26:49,059 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.28804347826086957 [2024-02-19 14:26:49,060 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 103 predicate places. [2024-02-19 14:26:49,060 INFO L507 AbstractCegarLoop]: Abstraction has has 126 places, 206 transitions, 6661 flow [2024-02-19 14:26:49,060 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:49,060 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:49,060 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:49,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:49,271 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-19 14:26:49,271 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:49,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash -187684385, now seen corresponding path program 7 times [2024-02-19 14:26:49,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:49,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169376794] [2024-02-19 14:26:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:49,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169376794] [2024-02-19 14:26:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169376794] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523236035] [2024-02-19 14:26:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:26:49,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:49,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:49,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 14:26:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:49,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:26:49,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:49,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:49,915 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 27 treesize of output 23 [2024-02-19 14:26:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:49,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:50,216 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:26:50,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-02-19 14:26:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:50,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523236035] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:50,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:50,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-02-19 14:26:50,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318702069] [2024-02-19 14:26:50,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:50,250 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:26:50,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:26:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:26:50,251 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:50,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 206 transitions, 6661 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:50,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:50,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:50,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:50,662 INFO L124 PetriNetUnfolderBase]: 286/547 cut-off events. [2024-02-19 14:26:50,663 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-02-19 14:26:50,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9312 conditions, 547 events. 286/547 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2345 event pairs, 0 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 6763. Up to 542 conditions per place. [2024-02-19 14:26:50,670 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 171 selfloop transitions, 44 changer transitions 30/246 dead transitions. [2024-02-19 14:26:50,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 246 transitions, 8449 flow [2024-02-19 14:26:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:26:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:26:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 95 transitions. [2024-02-19 14:26:50,671 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2024-02-19 14:26:50,671 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2024-02-19 14:26:50,671 INFO L507 AbstractCegarLoop]: Abstraction has has 137 places, 246 transitions, 8449 flow [2024-02-19 14:26:50,672 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:50,672 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:50,672 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:50,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:50,883 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-19 14:26:50,884 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:50,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1572632509, now seen corresponding path program 8 times [2024-02-19 14:26:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395224845] [2024-02-19 14:26:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:51,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:51,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395224845] [2024-02-19 14:26:51,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395224845] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154230675] [2024-02-19 14:26:51,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:26:51,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:51,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:51,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 14:26:51,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:26:51,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:51,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:26:51,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:51,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:51,542 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 27 treesize of output 19 [2024-02-19 14:26:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:51,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:51,844 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:51,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:51,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154230675] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:51,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:51,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-02-19 14:26:51,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420305098] [2024-02-19 14:26:51,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:51,958 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:26:51,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:26:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:26:51,959 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:51,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 246 transitions, 8449 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 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) [2024-02-19 14:26:51,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:51,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:51,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:52,333 INFO L124 PetriNetUnfolderBase]: 292/562 cut-off events. [2024-02-19 14:26:52,333 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-02-19 14:26:52,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10129 conditions, 562 events. 292/562 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2449 event pairs, 2 based on Foata normal form. 1/421 useless extension candidates. Maximal degree in co-relation 7268. Up to 557 conditions per place. [2024-02-19 14:26:52,341 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 190 selfloop transitions, 32 changer transitions 35/258 dead transitions. [2024-02-19 14:26:52,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 258 transitions, 9380 flow [2024-02-19 14:26:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:26:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:26:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 93 transitions. [2024-02-19 14:26:52,342 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-02-19 14:26:52,342 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 125 predicate places. [2024-02-19 14:26:52,342 INFO L507 AbstractCegarLoop]: Abstraction has has 148 places, 258 transitions, 9380 flow [2024-02-19 14:26:52,343 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 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) [2024-02-19 14:26:52,343 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:52,343 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:52,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:52,553 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-19 14:26:52,554 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:52,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1407049223, now seen corresponding path program 9 times [2024-02-19 14:26:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:52,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091234622] [2024-02-19 14:26:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:52,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:52,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:52,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091234622] [2024-02-19 14:26:52,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091234622] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:52,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883140354] [2024-02-19 14:26:52,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:26:52,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:52,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:52,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:52,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 14:26:53,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:26:53,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:53,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:26:53,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:53,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:26:53,112 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 27 treesize of output 19 [2024-02-19 14:26:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:53,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:53,384 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:26:53,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:26:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:53,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883140354] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:53,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-02-19 14:26:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319527017] [2024-02-19 14:26:53,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:53,454 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-19 14:26:53,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-19 14:26:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-02-19 14:26:53,455 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:53,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 258 transitions, 9380 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:53,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:53,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:53,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:53,833 INFO L124 PetriNetUnfolderBase]: 292/560 cut-off events. [2024-02-19 14:26:53,833 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-02-19 14:26:53,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10668 conditions, 560 events. 292/560 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2444 event pairs, 0 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 7671. Up to 556 conditions per place. [2024-02-19 14:26:53,840 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 186 selfloop transitions, 32 changer transitions 41/260 dead transitions. [2024-02-19 14:26:53,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 260 transitions, 9973 flow [2024-02-19 14:26:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:26:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:26:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 96 transitions. [2024-02-19 14:26:53,841 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3210702341137124 [2024-02-19 14:26:53,842 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2024-02-19 14:26:53,842 INFO L507 AbstractCegarLoop]: Abstraction has has 160 places, 260 transitions, 9973 flow [2024-02-19 14:26:53,842 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:53,842 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:53,842 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:53,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:54,044 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-19 14:26:54,044 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:54,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 5104618, now seen corresponding path program 10 times [2024-02-19 14:26:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697844286] [2024-02-19 14:26:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:54,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697844286] [2024-02-19 14:26:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697844286] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56842408] [2024-02-19 14:26:54,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:26:54,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:54,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:54,417 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:54,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 14:26:54,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:26:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:54,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:26:54,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:54,628 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:26:54,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:26:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:54,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:54,715 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:26:54,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:26:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:54,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56842408] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:54,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:54,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-02-19 14:26:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686329859] [2024-02-19 14:26:54,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:54,726 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:26:54,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:26:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:26:54,727 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:54,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 260 transitions, 9973 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:54,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:54,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:54,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:55,112 INFO L124 PetriNetUnfolderBase]: 308/588 cut-off events. [2024-02-19 14:26:55,113 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-02-19 14:26:55,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11788 conditions, 588 events. 308/588 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2587 event pairs, 0 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 8474. Up to 584 conditions per place. [2024-02-19 14:26:55,120 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 197 selfloop transitions, 33 changer transitions 41/272 dead transitions. [2024-02-19 14:26:55,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 272 transitions, 10977 flow [2024-02-19 14:26:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:26:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:26:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-02-19 14:26:55,121 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.383399209486166 [2024-02-19 14:26:55,122 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 147 predicate places. [2024-02-19 14:26:55,122 INFO L507 AbstractCegarLoop]: Abstraction has has 170 places, 272 transitions, 10977 flow [2024-02-19 14:26:55,122 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:55,122 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:55,122 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:55,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:55,334 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:55,334 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:55,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash -978547905, now seen corresponding path program 11 times [2024-02-19 14:26:55,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:55,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290144928] [2024-02-19 14:26:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290144928] [2024-02-19 14:26:55,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290144928] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549788656] [2024-02-19 14:26:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:26:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:55,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:55,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-19 14:26:56,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:26:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:56,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:26:56,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:56,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:56,285 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:26:56,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:26:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549788656] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:56,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-19 14:26:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142113790] [2024-02-19 14:26:56,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:56,317 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-19 14:26:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-19 14:26:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-02-19 14:26:56,318 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:56,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 272 transitions, 10977 flow. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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) [2024-02-19 14:26:56,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:56,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:56,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:56,660 INFO L124 PetriNetUnfolderBase]: 313/606 cut-off events. [2024-02-19 14:26:56,660 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-02-19 14:26:56,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12756 conditions, 606 events. 313/606 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2765 event pairs, 0 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 9044. Up to 602 conditions per place. [2024-02-19 14:26:56,667 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 184 selfloop transitions, 39 changer transitions 57/281 dead transitions. [2024-02-19 14:26:56,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 281 transitions, 11906 flow [2024-02-19 14:26:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:26:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:26:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-02-19 14:26:56,668 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-02-19 14:26:56,669 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 155 predicate places. [2024-02-19 14:26:56,669 INFO L507 AbstractCegarLoop]: Abstraction has has 178 places, 281 transitions, 11906 flow [2024-02-19 14:26:56,669 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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) [2024-02-19 14:26:56,669 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:56,669 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:56,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-19 14:26:56,881 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:56,881 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:56,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash -359293241, now seen corresponding path program 12 times [2024-02-19 14:26:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:56,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949587048] [2024-02-19 14:26:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949587048] [2024-02-19 14:26:57,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949587048] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147794530] [2024-02-19 14:26:57,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:26:57,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:57,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:57,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-19 14:26:57,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:26:57,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:26:57,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:26:57,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:57,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:57,930 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:26:57,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:26:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147794530] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:57,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:26:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829554705] [2024-02-19 14:26:57,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:57,960 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:26:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:26:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:26:57,961 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:57,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 281 transitions, 11906 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:57,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:57,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:57,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:58,320 INFO L124 PetriNetUnfolderBase]: 315/617 cut-off events. [2024-02-19 14:26:58,320 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-02-19 14:26:58,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13605 conditions, 617 events. 315/617 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2881 event pairs, 0 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 9562. Up to 613 conditions per place. [2024-02-19 14:26:58,325 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 187 selfloop transitions, 31 changer transitions 67/286 dead transitions. [2024-02-19 14:26:58,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 286 transitions, 12692 flow [2024-02-19 14:26:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:26:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:26:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-02-19 14:26:58,326 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-02-19 14:26:58,327 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 163 predicate places. [2024-02-19 14:26:58,327 INFO L507 AbstractCegarLoop]: Abstraction has has 186 places, 286 transitions, 12692 flow [2024-02-19 14:26:58,327 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:26:58,327 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:58,327 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:58,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-02-19 14:26:58,539 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:58,539 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:26:58,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:26:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2017836130, now seen corresponding path program 13 times [2024-02-19 14:26:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:26:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307495958] [2024-02-19 14:26:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:26:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:26:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:26:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307495958] [2024-02-19 14:26:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307495958] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:26:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374464902] [2024-02-19 14:26:58,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:26:58,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:26:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:26:58,955 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:26:58,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-19 14:26:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:26:59,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:26:59,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:26:59,178 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:26:59,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:26:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:59,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:26:59,289 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:26:59,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:26:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:26:59,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374464902] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:26:59,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:26:59,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-19 14:26:59,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649184379] [2024-02-19 14:26:59,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:26:59,301 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:26:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:26:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:26:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:26:59,302 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:26:59,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 286 transitions, 12692 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 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) [2024-02-19 14:26:59,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:26:59,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:26:59,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:26:59,818 INFO L124 PetriNetUnfolderBase]: 346/676 cut-off events. [2024-02-19 14:26:59,818 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-02-19 14:26:59,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 676 events. 346/676 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3252 event pairs, 0 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 10939. Up to 672 conditions per place. [2024-02-19 14:26:59,826 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 203 selfloop transitions, 39 changer transitions 70/313 dead transitions. [2024-02-19 14:26:59,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 313 transitions, 14519 flow [2024-02-19 14:26:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:26:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:26:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2024-02-19 14:26:59,828 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37577639751552794 [2024-02-19 14:26:59,828 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 176 predicate places. [2024-02-19 14:26:59,828 INFO L507 AbstractCegarLoop]: Abstraction has has 199 places, 313 transitions, 14519 flow [2024-02-19 14:26:59,828 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 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) [2024-02-19 14:26:59,828 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:26:59,829 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:26:59,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:00,038 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:00,039 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:00,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1060527458, now seen corresponding path program 14 times [2024-02-19 14:27:00,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:00,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465702441] [2024-02-19 14:27:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:00,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465702441] [2024-02-19 14:27:00,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465702441] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950993671] [2024-02-19 14:27:00,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:27:00,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:00,467 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:27:00,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-19 14:27:00,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:27:00,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:00,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:00,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:00,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:00,735 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 65 treesize of output 41 [2024-02-19 14:27:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:00,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:00,872 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:27:00,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:27:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950993671] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:00,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:27:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920278448] [2024-02-19 14:27:00,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:00,894 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:00,895 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:00,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 313 transitions, 14519 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:00,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:00,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:00,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:01,423 INFO L124 PetriNetUnfolderBase]: 358/703 cut-off events. [2024-02-19 14:27:01,424 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-02-19 14:27:01,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16884 conditions, 703 events. 358/703 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3451 event pairs, 0 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 11798. Up to 698 conditions per place. [2024-02-19 14:27:01,434 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 211 selfloop transitions, 43 changer transitions 82/337 dead transitions. [2024-02-19 14:27:01,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 337 transitions, 16313 flow [2024-02-19 14:27:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 14:27:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 14:27:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 135 transitions. [2024-02-19 14:27:01,436 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2024-02-19 14:27:01,436 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2024-02-19 14:27:01,436 INFO L507 AbstractCegarLoop]: Abstraction has has 213 places, 337 transitions, 16313 flow [2024-02-19 14:27:01,436 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:01,436 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:01,437 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:01,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:01,648 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:01,649 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:01,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1650423018, now seen corresponding path program 15 times [2024-02-19 14:27:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:01,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985967552] [2024-02-19 14:27:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:02,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:02,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985967552] [2024-02-19 14:27:02,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985967552] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:02,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287813568] [2024-02-19 14:27:02,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:27:02,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:02,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:02,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:27:02,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-19 14:27:02,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:27:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:02,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:02,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:02,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:02,350 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 65 treesize of output 41 [2024-02-19 14:27:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:02,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:02,499 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:27:02,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:27:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287813568] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:02,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:02,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:27:02,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902871017] [2024-02-19 14:27:02,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:02,519 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:02,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:02,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:02,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:02,520 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:02,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 337 transitions, 16313 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:02,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:02,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:02,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:03,121 INFO L124 PetriNetUnfolderBase]: 376/730 cut-off events. [2024-02-19 14:27:03,121 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-02-19 14:27:03,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18284 conditions, 730 events. 376/730 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3578 event pairs, 0 based on Foata normal form. 0/570 useless extension candidates. Maximal degree in co-relation 12839. Up to 726 conditions per place. [2024-02-19 14:27:03,130 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 217 selfloop transitions, 48 changer transitions 82/348 dead transitions. [2024-02-19 14:27:03,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 348 transitions, 17538 flow [2024-02-19 14:27:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:27:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:27:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 139 transitions. [2024-02-19 14:27:03,132 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37771739130434784 [2024-02-19 14:27:03,132 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 204 predicate places. [2024-02-19 14:27:03,132 INFO L507 AbstractCegarLoop]: Abstraction has has 227 places, 348 transitions, 17538 flow [2024-02-19 14:27:03,132 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:03,133 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:03,133 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:03,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:03,343 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:03,344 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:03,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash 746676931, now seen corresponding path program 16 times [2024-02-19 14:27:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:03,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453093005] [2024-02-19 14:27:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:03,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:03,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:03,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453093005] [2024-02-19 14:27:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453093005] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586180024] [2024-02-19 14:27:03,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:27:03,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:03,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:03,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:27:03,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-19 14:27:03,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:27:03,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:03,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:03,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:04,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:04,025 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 46 treesize of output 34 [2024-02-19 14:27:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:04,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:04,178 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:27:04,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:27:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:04,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586180024] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:04,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:04,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-19 14:27:04,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525026766] [2024-02-19 14:27:04,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:04,198 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:04,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:04,199 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:04,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 348 transitions, 17538 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:04,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:04,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:04,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:04,654 INFO L124 PetriNetUnfolderBase]: 388/757 cut-off events. [2024-02-19 14:27:04,654 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-02-19 14:27:04,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19692 conditions, 757 events. 388/757 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3758 event pairs, 0 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 13768. Up to 752 conditions per place. [2024-02-19 14:27:04,664 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 242 selfloop transitions, 34 changer transitions 82/359 dead transitions. [2024-02-19 14:27:04,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 359 transitions, 18810 flow [2024-02-19 14:27:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-02-19 14:27:04,666 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4396135265700483 [2024-02-19 14:27:04,666 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 212 predicate places. [2024-02-19 14:27:04,666 INFO L507 AbstractCegarLoop]: Abstraction has has 235 places, 359 transitions, 18810 flow [2024-02-19 14:27:04,666 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:04,666 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:04,667 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:04,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:04,878 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-19 14:27:04,878 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:04,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1149735073, now seen corresponding path program 17 times [2024-02-19 14:27:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:04,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604608029] [2024-02-19 14:27:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604608029] [2024-02-19 14:27:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604608029] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600822840] [2024-02-19 14:27:05,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:27:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:05,312 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:27:05,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-19 14:27:05,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:27:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:05,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:27:05,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:05,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:05,627 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 46 treesize of output 34 [2024-02-19 14:27:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:05,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:05,801 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:27:05,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:27:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:05,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600822840] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:05,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:05,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-19 14:27:05,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484685087] [2024-02-19 14:27:05,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:05,828 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-19 14:27:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-19 14:27:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-02-19 14:27:05,832 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:05,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 359 transitions, 18810 flow. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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) [2024-02-19 14:27:05,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:05,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:05,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:06,417 INFO L124 PetriNetUnfolderBase]: 378/736 cut-off events. [2024-02-19 14:27:06,417 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-02-19 14:27:06,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19902 conditions, 736 events. 378/736 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3635 event pairs, 0 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 14081. Up to 732 conditions per place. [2024-02-19 14:27:06,424 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 231 selfloop transitions, 33 changer transitions 86/351 dead transitions. [2024-02-19 14:27:06,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 351 transitions, 19088 flow [2024-02-19 14:27:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-02-19 14:27:06,439 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2024-02-19 14:27:06,440 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 221 predicate places. [2024-02-19 14:27:06,440 INFO L507 AbstractCegarLoop]: Abstraction has has 244 places, 351 transitions, 19088 flow [2024-02-19 14:27:06,440 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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) [2024-02-19 14:27:06,440 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:06,440 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:06,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:06,652 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-19 14:27:06,652 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:06,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash 734798347, now seen corresponding path program 18 times [2024-02-19 14:27:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812776722] [2024-02-19 14:27:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:06,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:06,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812776722] [2024-02-19 14:27:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812776722] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:06,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082654903] [2024-02-19 14:27:06,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:27:06,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:06,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:06,995 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) [2024-02-19 14:27:07,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-19 14:27:07,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:27:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:07,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:27:07,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:07,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:07,371 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:07,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082654903] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:07,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:07,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-02-19 14:27:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315107073] [2024-02-19 14:27:07,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:07,411 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:27:07,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:27:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:27:07,411 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:07,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 351 transitions, 19088 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:07,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:07,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:07,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:07,815 INFO L124 PetriNetUnfolderBase]: 374/732 cut-off events. [2024-02-19 14:27:07,815 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-02-19 14:27:07,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20524 conditions, 732 events. 374/732 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3615 event pairs, 0 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 14546. Up to 728 conditions per place. [2024-02-19 14:27:07,824 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 236 selfloop transitions, 19 changer transitions 94/350 dead transitions. [2024-02-19 14:27:07,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 350 transitions, 19732 flow [2024-02-19 14:27:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-02-19 14:27:07,830 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3526570048309179 [2024-02-19 14:27:07,830 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 229 predicate places. [2024-02-19 14:27:07,830 INFO L507 AbstractCegarLoop]: Abstraction has has 252 places, 350 transitions, 19732 flow [2024-02-19 14:27:07,830 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:07,830 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:07,830 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:07,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:08,041 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-19 14:27:08,042 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:08,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash -744737596, now seen corresponding path program 19 times [2024-02-19 14:27:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244061058] [2024-02-19 14:27:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:08,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:08,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244061058] [2024-02-19 14:27:08,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244061058] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416608912] [2024-02-19 14:27:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:27:08,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:08,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:08,457 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) [2024-02-19 14:27:08,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-19 14:27:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:08,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:08,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:08,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:08,768 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:08,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:08,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416608912] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:08,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:08,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-19 14:27:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244982549] [2024-02-19 14:27:08,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:08,825 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:08,825 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:08,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 350 transitions, 19732 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:08,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:08,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:08,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:09,203 INFO L124 PetriNetUnfolderBase]: 372/730 cut-off events. [2024-02-19 14:27:09,203 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-02-19 14:27:09,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21196 conditions, 730 events. 372/730 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3627 event pairs, 0 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 15007. Up to 726 conditions per place. [2024-02-19 14:27:09,214 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 236 selfloop transitions, 18 changer transitions 102/357 dead transitions. [2024-02-19 14:27:09,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 357 transitions, 20839 flow [2024-02-19 14:27:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2024-02-19 14:27:09,214 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3347826086956522 [2024-02-19 14:27:09,216 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2024-02-19 14:27:09,216 INFO L507 AbstractCegarLoop]: Abstraction has has 261 places, 357 transitions, 20839 flow [2024-02-19 14:27:09,216 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:09,216 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:09,216 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:09,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:09,419 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:09,420 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:09,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 571419708, now seen corresponding path program 20 times [2024-02-19 14:27:09,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:09,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969829946] [2024-02-19 14:27:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:09,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:09,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969829946] [2024-02-19 14:27:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969829946] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259679677] [2024-02-19 14:27:09,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:27:09,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:09,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:09,904 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) [2024-02-19 14:27:09,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-19 14:27:10,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:27:10,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:10,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:10,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:10,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:10,195 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 65 treesize of output 41 [2024-02-19 14:27:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:10,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:10,327 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:10,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259679677] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:10,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-19 14:27:10,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139996371] [2024-02-19 14:27:10,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:10,376 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:10,377 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:10,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 357 transitions, 20839 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:10,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:10,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:10,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:10,969 INFO L124 PetriNetUnfolderBase]: 384/757 cut-off events. [2024-02-19 14:27:10,969 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-02-19 14:27:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22708 conditions, 757 events. 384/757 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3804 event pairs, 0 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 16004. Up to 752 conditions per place. [2024-02-19 14:27:10,980 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 241 selfloop transitions, 23 changer transitions 104/369 dead transitions. [2024-02-19 14:27:10,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 369 transitions, 22280 flow [2024-02-19 14:27:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:27:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:27:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 103 transitions. [2024-02-19 14:27:10,982 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37318840579710144 [2024-02-19 14:27:10,982 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 249 predicate places. [2024-02-19 14:27:10,982 INFO L507 AbstractCegarLoop]: Abstraction has has 272 places, 369 transitions, 22280 flow [2024-02-19 14:27:10,983 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:10,983 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:10,983 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:10,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:11,184 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-19 14:27:11,185 INFO L432 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:11,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1916343199, now seen corresponding path program 21 times [2024-02-19 14:27:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562566320] [2024-02-19 14:27:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:11,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562566320] [2024-02-19 14:27:11,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562566320] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:11,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702071145] [2024-02-19 14:27:11,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:27:11,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:11,646 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) [2024-02-19 14:27:11,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-19 14:27:11,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:27:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:11,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:11,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:11,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:11,884 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 65 treesize of output 41 [2024-02-19 14:27:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:11,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:12,018 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:12,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702071145] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:12,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:12,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-19 14:27:12,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135246727] [2024-02-19 14:27:12,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:12,071 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:12,071 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:12,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 369 transitions, 22280 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:12,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:12,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:12,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:12,596 INFO L124 PetriNetUnfolderBase]: 412/815 cut-off events. [2024-02-19 14:27:12,596 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-02-19 14:27:12,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25206 conditions, 815 events. 412/815 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4194 event pairs, 0 based on Foata normal form. 0/641 useless extension candidates. Maximal degree in co-relation 17653. Up to 808 conditions per place. [2024-02-19 14:27:12,612 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 260 selfloop transitions, 27 changer transitions 104/392 dead transitions. [2024-02-19 14:27:12,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 392 transitions, 24454 flow [2024-02-19 14:27:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:27:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:27:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 117 transitions. [2024-02-19 14:27:12,614 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36335403726708076 [2024-02-19 14:27:12,614 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 262 predicate places. [2024-02-19 14:27:12,614 INFO L507 AbstractCegarLoop]: Abstraction has has 285 places, 392 transitions, 24454 flow [2024-02-19 14:27:12,614 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:12,614 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:12,614 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:12,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-02-19 14:27:12,822 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:12,822 INFO L432 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:12,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1012597112, now seen corresponding path program 22 times [2024-02-19 14:27:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133754495] [2024-02-19 14:27:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133754495] [2024-02-19 14:27:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133754495] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189153879] [2024-02-19 14:27:13,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:27:13,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:13,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:13,253 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) [2024-02-19 14:27:13,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-19 14:27:13,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:27:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:13,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:13,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:13,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:13,492 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 46 treesize of output 34 [2024-02-19 14:27:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:13,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:13,636 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:13,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189153879] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:13,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:13,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-19 14:27:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093818532] [2024-02-19 14:27:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:13,683 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:13,684 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:13,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 392 transitions, 24454 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:13,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:13,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:13,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:14,141 INFO L124 PetriNetUnfolderBase]: 406/800 cut-off events. [2024-02-19 14:27:14,141 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-19 14:27:14,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 800 events. 406/800 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4076 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 17966. Up to 794 conditions per place. [2024-02-19 14:27:14,153 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 258 selfloop transitions, 22 changer transitions 104/385 dead transitions. [2024-02-19 14:27:14,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 385 transitions, 24782 flow [2024-02-19 14:27:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 86 transitions. [2024-02-19 14:27:14,155 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3739130434782609 [2024-02-19 14:27:14,155 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 270 predicate places. [2024-02-19 14:27:14,155 INFO L507 AbstractCegarLoop]: Abstraction has has 293 places, 385 transitions, 24782 flow [2024-02-19 14:27:14,155 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:14,155 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:14,155 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:14,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-02-19 14:27:14,366 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-02-19 14:27:14,367 INFO L432 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:14,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1513285057, now seen corresponding path program 23 times [2024-02-19 14:27:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481106282] [2024-02-19 14:27:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:14,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481106282] [2024-02-19 14:27:14,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481106282] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:14,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183807953] [2024-02-19 14:27:14,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:27:14,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:14,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:14,772 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) [2024-02-19 14:27:14,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-19 14:27:15,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:27:15,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:15,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:15,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:15,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:15,156 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 46 treesize of output 34 [2024-02-19 14:27:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:15,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:15,303 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:15,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:15,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183807953] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:15,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:15,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-19 14:27:15,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416100663] [2024-02-19 14:27:15,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:15,344 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:15,345 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:15,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 385 transitions, 24782 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:15,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:15,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:15,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:15,828 INFO L124 PetriNetUnfolderBase]: 392/775 cut-off events. [2024-02-19 14:27:15,829 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-02-19 14:27:15,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 775 events. 392/775 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3951 event pairs, 0 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 18197. Up to 770 conditions per place. [2024-02-19 14:27:15,841 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 244 selfloop transitions, 23 changer transitions 108/376 dead transitions. [2024-02-19 14:27:15,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 376 transitions, 24950 flow [2024-02-19 14:27:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:27:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:27:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2024-02-19 14:27:15,842 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-02-19 14:27:15,843 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 280 predicate places. [2024-02-19 14:27:15,843 INFO L507 AbstractCegarLoop]: Abstraction has has 303 places, 376 transitions, 24950 flow [2024-02-19 14:27:15,844 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:15,844 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:15,844 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:16,055 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:16,055 INFO L432 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:16,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash -923744542, now seen corresponding path program 24 times [2024-02-19 14:27:16,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:16,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955771916] [2024-02-19 14:27:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:16,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955771916] [2024-02-19 14:27:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955771916] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992129968] [2024-02-19 14:27:16,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:27:16,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:16,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:16,402 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) [2024-02-19 14:27:16,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-19 14:27:16,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:27:16,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:16,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:16,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:16,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:16,768 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:16,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:16,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992129968] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:16,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:16,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-02-19 14:27:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928180789] [2024-02-19 14:27:16,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:16,805 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:27:16,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:27:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:27:16,806 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:16,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 376 transitions, 24950 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:16,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:16,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:16,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:17,206 INFO L124 PetriNetUnfolderBase]: 400/789 cut-off events. [2024-02-19 14:27:17,206 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-19 14:27:17,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26814 conditions, 789 events. 400/789 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4060 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 19088. Up to 784 conditions per place. [2024-02-19 14:27:17,221 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 252 selfloop transitions, 21 changer transitions 108/382 dead transitions. [2024-02-19 14:27:17,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 382 transitions, 26111 flow [2024-02-19 14:27:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 86 transitions. [2024-02-19 14:27:17,222 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3739130434782609 [2024-02-19 14:27:17,223 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 289 predicate places. [2024-02-19 14:27:17,223 INFO L507 AbstractCegarLoop]: Abstraction has has 312 places, 382 transitions, 26111 flow [2024-02-19 14:27:17,223 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:17,223 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:17,223 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:17,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-02-19 14:27:17,426 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:17,426 INFO L432 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:17,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash -555976385, now seen corresponding path program 25 times [2024-02-19 14:27:17,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:17,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385630184] [2024-02-19 14:27:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:17,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:17,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385630184] [2024-02-19 14:27:17,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385630184] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870008734] [2024-02-19 14:27:17,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:27:17,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:17,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:17,783 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) [2024-02-19 14:27:17,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-19 14:27:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:17,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:17,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:18,022 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:27:18,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:27:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:18,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:18,116 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:18,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:18,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870008734] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:18,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:18,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-19 14:27:18,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209859865] [2024-02-19 14:27:18,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:18,161 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:18,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:18,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:18,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:18,161 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:18,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 382 transitions, 26111 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:18,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:18,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:18,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:18,552 INFO L124 PetriNetUnfolderBase]: 400/782 cut-off events. [2024-02-19 14:27:18,552 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-02-19 14:27:18,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27386 conditions, 782 events. 400/782 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3975 event pairs, 0 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 19719. Up to 778 conditions per place. [2024-02-19 14:27:18,565 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 250 selfloop transitions, 20 changer transitions 108/379 dead transitions. [2024-02-19 14:27:18,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 379 transitions, 26657 flow [2024-02-19 14:27:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-02-19 14:27:18,566 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-19 14:27:18,567 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 295 predicate places. [2024-02-19 14:27:18,567 INFO L507 AbstractCegarLoop]: Abstraction has has 318 places, 379 transitions, 26657 flow [2024-02-19 14:27:18,567 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:18,567 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:18,567 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:18,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:18,778 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:18,779 INFO L432 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2051140635, now seen corresponding path program 26 times [2024-02-19 14:27:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:18,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846742760] [2024-02-19 14:27:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846742760] [2024-02-19 14:27:19,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846742760] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055436930] [2024-02-19 14:27:19,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:27:19,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:19,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:19,187 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) [2024-02-19 14:27:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-19 14:27:19,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:27:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:19,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:27:19,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:19,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:19,466 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 46 treesize of output 30 [2024-02-19 14:27:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:19,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:19,616 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:19,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055436930] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:19,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:19,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:27:19,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144582479] [2024-02-19 14:27:19,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:19,694 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:19,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:19,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:19,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:19,694 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:19,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 379 transitions, 26657 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:19,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:19,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:19,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:20,255 INFO L124 PetriNetUnfolderBase]: 408/805 cut-off events. [2024-02-19 14:27:20,256 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-02-19 14:27:20,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28962 conditions, 805 events. 408/805 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4151 event pairs, 0 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 20858. Up to 800 conditions per place. [2024-02-19 14:27:20,269 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 253 selfloop transitions, 23 changer transitions 112/389 dead transitions. [2024-02-19 14:27:20,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 389 transitions, 28139 flow [2024-02-19 14:27:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:27:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:27:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 102 transitions. [2024-02-19 14:27:20,270 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-19 14:27:20,271 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 306 predicate places. [2024-02-19 14:27:20,271 INFO L507 AbstractCegarLoop]: Abstraction has has 329 places, 389 transitions, 28139 flow [2024-02-19 14:27:20,271 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:20,271 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:20,271 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:20,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-02-19 14:27:20,472 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-02-19 14:27:20,472 INFO L432 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:20,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 33564130, now seen corresponding path program 27 times [2024-02-19 14:27:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384475442] [2024-02-19 14:27:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:27:21,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384475442] [2024-02-19 14:27:21,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384475442] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497571487] [2024-02-19 14:27:21,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:27:21,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:21,407 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) [2024-02-19 14:27:21,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-19 14:27:21,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:27:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:21,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2024-02-19 14:27:21,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:21,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:21,701 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 65 treesize of output 41 [2024-02-19 14:27:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:21,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:21,914 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:21,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:21,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497571487] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:21,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:21,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 8] total 29 [2024-02-19 14:27:21,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561619800] [2024-02-19 14:27:21,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:21,992 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:27:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:27:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:27:21,993 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:21,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 389 transitions, 28139 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:21,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:21,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:21,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:22,852 INFO L124 PetriNetUnfolderBase]: 416/819 cut-off events. [2024-02-19 14:27:22,852 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-19 14:27:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30282 conditions, 819 events. 416/819 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4235 event pairs, 2 based on Foata normal form. 0/657 useless extension candidates. Maximal degree in co-relation 21733. Up to 813 conditions per place. [2024-02-19 14:27:22,867 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 244 selfloop transitions, 41 changer transitions 115/401 dead transitions. [2024-02-19 14:27:22,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 401 transitions, 29806 flow [2024-02-19 14:27:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-19 14:27:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-19 14:27:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 157 transitions. [2024-02-19 14:27:22,869 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3250517598343685 [2024-02-19 14:27:22,869 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 325 predicate places. [2024-02-19 14:27:22,869 INFO L507 AbstractCegarLoop]: Abstraction has has 348 places, 401 transitions, 29806 flow [2024-02-19 14:27:22,869 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:22,869 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:22,869 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:22,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:23,081 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-02-19 14:27:23,081 INFO L432 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:23,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1550452690, now seen corresponding path program 28 times [2024-02-19 14:27:23,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:23,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609873209] [2024-02-19 14:27:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:27:24,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:24,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609873209] [2024-02-19 14:27:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609873209] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:24,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322982030] [2024-02-19 14:27:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:27:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:24,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:24,168 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) [2024-02-19 14:27:24,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-19 14:27:24,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:27:24,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:24,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:24,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:24,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:24,421 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 46 treesize of output 34 [2024-02-19 14:27:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:24,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:24,641 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:24,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322982030] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:24,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 7] total 28 [2024-02-19 14:27:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922619668] [2024-02-19 14:27:24,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:24,709 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-19 14:27:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:24,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-19 14:27:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-02-19 14:27:24,710 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:24,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 401 transitions, 29806 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:24,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:24,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:24,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:25,635 INFO L124 PetriNetUnfolderBase]: 424/830 cut-off events. [2024-02-19 14:27:25,635 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-02-19 14:27:25,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31552 conditions, 830 events. 424/830 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4222 event pairs, 0 based on Foata normal form. 0/666 useless extension candidates. Maximal degree in co-relation 22396. Up to 822 conditions per place. [2024-02-19 14:27:25,650 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 243 selfloop transitions, 53 changer transitions 121/418 dead transitions. [2024-02-19 14:27:25,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 418 transitions, 31901 flow [2024-02-19 14:27:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:27:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:27:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 166 transitions. [2024-02-19 14:27:25,651 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32806324110671936 [2024-02-19 14:27:25,652 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 345 predicate places. [2024-02-19 14:27:25,652 INFO L507 AbstractCegarLoop]: Abstraction has has 368 places, 418 transitions, 31901 flow [2024-02-19 14:27:25,652 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:25,652 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:25,652 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:25,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:25,864 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:25,865 INFO L432 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:25,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1679297296, now seen corresponding path program 29 times [2024-02-19 14:27:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:25,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132712112] [2024-02-19 14:27:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132712112] [2024-02-19 14:27:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132712112] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990065634] [2024-02-19 14:27:26,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:27:26,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:26,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:26,287 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) [2024-02-19 14:27:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-02-19 14:27:26,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:27:26,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:26,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:27:26,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:26,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:26,726 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:27:26,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:27:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990065634] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:26,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:26,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-19 14:27:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443674024] [2024-02-19 14:27:26,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:26,754 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-19 14:27:26,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:26,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-19 14:27:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-02-19 14:27:26,755 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:26,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 418 transitions, 31901 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:26,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:26,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:26,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:27,267 INFO L124 PetriNetUnfolderBase]: 425/840 cut-off events. [2024-02-19 14:27:27,267 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-02-19 14:27:27,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32772 conditions, 840 events. 425/840 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4355 event pairs, 0 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 23258. Up to 832 conditions per place. [2024-02-19 14:27:27,283 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 254 selfloop transitions, 54 changer transitions 140/449 dead transitions. [2024-02-19 14:27:27,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 449 transitions, 35168 flow [2024-02-19 14:27:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-02-19 14:27:27,284 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2024-02-19 14:27:27,285 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 353 predicate places. [2024-02-19 14:27:27,285 INFO L507 AbstractCegarLoop]: Abstraction has has 376 places, 449 transitions, 35168 flow [2024-02-19 14:27:27,285 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:27,285 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:27,285 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:27,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:27,497 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-19 14:27:27,497 INFO L432 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:27,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2080440198, now seen corresponding path program 30 times [2024-02-19 14:27:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092587641] [2024-02-19 14:27:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:27,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:27,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:27,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092587641] [2024-02-19 14:27:27,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092587641] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:27,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818555233] [2024-02-19 14:27:27,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:27:27,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:27,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:28,004 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) [2024-02-19 14:27:28,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-02-19 14:27:28,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:27:28,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:28,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:28,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:28,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:28,455 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:27:28,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:27:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:28,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818555233] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:28,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:27:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944491188] [2024-02-19 14:27:28,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:28,477 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:28,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:28,478 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:28,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 449 transitions, 35168 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:28,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:28,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:28,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:28,921 INFO L124 PetriNetUnfolderBase]: 425/847 cut-off events. [2024-02-19 14:27:28,921 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-02-19 14:27:28,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33892 conditions, 847 events. 425/847 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4459 event pairs, 0 based on Foata normal form. 0/683 useless extension candidates. Maximal degree in co-relation 24014. Up to 839 conditions per place. [2024-02-19 14:27:28,935 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 255 selfloop transitions, 50 changer transitions 149/455 dead transitions. [2024-02-19 14:27:28,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 455 transitions, 36550 flow [2024-02-19 14:27:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2024-02-19 14:27:28,936 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3671497584541063 [2024-02-19 14:27:28,937 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 361 predicate places. [2024-02-19 14:27:28,937 INFO L507 AbstractCegarLoop]: Abstraction has has 384 places, 455 transitions, 36550 flow [2024-02-19 14:27:28,937 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:28,937 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:28,937 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:28,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:29,148 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-02-19 14:27:29,149 INFO L432 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:29,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash -742203539, now seen corresponding path program 31 times [2024-02-19 14:27:29,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:29,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175100471] [2024-02-19 14:27:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:29,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175100471] [2024-02-19 14:27:29,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175100471] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007431608] [2024-02-19 14:27:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:27:29,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:29,489 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) [2024-02-19 14:27:29,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-02-19 14:27:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:29,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-19 14:27:29,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:29,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:29,731 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 65 treesize of output 45 [2024-02-19 14:27:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:29,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:29,863 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:29,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:29,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007431608] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:29,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:29,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-19 14:27:29,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001255800] [2024-02-19 14:27:29,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:29,907 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:29,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:29,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:29,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:29,908 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:29,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 455 transitions, 36550 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:29,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:29,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:29,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:30,544 INFO L124 PetriNetUnfolderBase]: 439/880 cut-off events. [2024-02-19 14:27:30,544 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-19 14:27:30,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36053 conditions, 880 events. 439/880 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4682 event pairs, 0 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 25680. Up to 871 conditions per place. [2024-02-19 14:27:30,557 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 281 selfloop transitions, 34 changer transitions 153/469 dead transitions. [2024-02-19 14:27:30,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 469 transitions, 38612 flow [2024-02-19 14:27:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:27:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:27:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2024-02-19 14:27:30,558 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3377926421404682 [2024-02-19 14:27:30,559 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2024-02-19 14:27:30,559 INFO L507 AbstractCegarLoop]: Abstraction has has 396 places, 469 transitions, 38612 flow [2024-02-19 14:27:30,559 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:30,559 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:30,559 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:30,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:30,770 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-19 14:27:30,771 INFO L432 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:30,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1145261681, now seen corresponding path program 32 times [2024-02-19 14:27:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:30,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324373472] [2024-02-19 14:27:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324373472] [2024-02-19 14:27:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324373472] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72578849] [2024-02-19 14:27:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:27:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:31,154 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) [2024-02-19 14:27:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-02-19 14:27:31,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:27:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:31,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:27:31,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:31,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:31,446 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 46 treesize of output 30 [2024-02-19 14:27:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:31,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:31,579 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:31,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72578849] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:31,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:31,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-02-19 14:27:31,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447438386] [2024-02-19 14:27:31,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:31,616 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:27:31,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:27:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:27:31,617 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:31,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 469 transitions, 38612 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:31,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:31,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:32,281 INFO L124 PetriNetUnfolderBase]: 445/890 cut-off events. [2024-02-19 14:27:32,281 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-02-19 14:27:32,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37350 conditions, 890 events. 445/890 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4734 event pairs, 0 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 26726. Up to 881 conditions per place. [2024-02-19 14:27:32,293 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 283 selfloop transitions, 36 changer transitions 153/473 dead transitions. [2024-02-19 14:27:32,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 473 transitions, 39884 flow [2024-02-19 14:27:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:27:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:27:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2024-02-19 14:27:32,294 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33229813664596275 [2024-02-19 14:27:32,294 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 386 predicate places. [2024-02-19 14:27:32,294 INFO L507 AbstractCegarLoop]: Abstraction has has 409 places, 473 transitions, 39884 flow [2024-02-19 14:27:32,298 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:32,298 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:32,298 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:32,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:32,509 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:32,509 INFO L432 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:32,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash 26343922, now seen corresponding path program 33 times [2024-02-19 14:27:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:32,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532598124] [2024-02-19 14:27:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532598124] [2024-02-19 14:27:32,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532598124] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539010917] [2024-02-19 14:27:32,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:27:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:32,851 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) [2024-02-19 14:27:32,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-02-19 14:27:33,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:27:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:33,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:33,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:33,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:33,210 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:33,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539010917] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:33,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:33,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-02-19 14:27:33,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069594401] [2024-02-19 14:27:33,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:33,266 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:27:33,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:33,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:27:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:27:33,266 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:33,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 473 transitions, 39884 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:33,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:33,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:33,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:33,807 INFO L124 PetriNetUnfolderBase]: 443/888 cut-off events. [2024-02-19 14:27:33,807 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-02-19 14:27:33,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38151 conditions, 888 events. 443/888 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4762 event pairs, 0 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 27276. Up to 879 conditions per place. [2024-02-19 14:27:33,823 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 288 selfloop transitions, 26 changer transitions 157/472 dead transitions. [2024-02-19 14:27:33,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 472 transitions, 40742 flow [2024-02-19 14:27:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-02-19 14:27:33,824 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-02-19 14:27:33,825 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 394 predicate places. [2024-02-19 14:27:33,825 INFO L507 AbstractCegarLoop]: Abstraction has has 417 places, 472 transitions, 40742 flow [2024-02-19 14:27:33,825 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:33,825 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:33,825 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:33,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:34,036 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:34,037 INFO L432 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:34,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash -314337257, now seen corresponding path program 34 times [2024-02-19 14:27:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:34,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917193233] [2024-02-19 14:27:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917193233] [2024-02-19 14:27:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917193233] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082887115] [2024-02-19 14:27:34,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:27:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:34,581 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) [2024-02-19 14:27:34,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-02-19 14:27:34,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:27:34,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:34,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:34,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:34,850 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:27:34,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:27:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:34,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:34,935 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:27:34,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:27:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:34,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082887115] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:34,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:34,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-02-19 14:27:34,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459942726] [2024-02-19 14:27:34,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:34,943 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:27:34,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:27:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:27:34,944 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 472 transitions, 40742 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:35,488 INFO L124 PetriNetUnfolderBase]: 455/908 cut-off events. [2024-02-19 14:27:35,489 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-02-19 14:27:35,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39916 conditions, 908 events. 455/908 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4854 event pairs, 0 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 28790. Up to 899 conditions per place. [2024-02-19 14:27:35,506 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 271 selfloop transitions, 51 changer transitions 157/480 dead transitions. [2024-02-19 14:27:35,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 480 transitions, 42388 flow [2024-02-19 14:27:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:27:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:27:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2024-02-19 14:27:35,507 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3438735177865613 [2024-02-19 14:27:35,507 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 404 predicate places. [2024-02-19 14:27:35,507 INFO L507 AbstractCegarLoop]: Abstraction has has 427 places, 480 transitions, 42388 flow [2024-02-19 14:27:35,507 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:35,507 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:35,508 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:35,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:35,719 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-02-19 14:27:35,719 INFO L432 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:35,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1891678987, now seen corresponding path program 35 times [2024-02-19 14:27:35,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:35,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851193074] [2024-02-19 14:27:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:36,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851193074] [2024-02-19 14:27:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851193074] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751854341] [2024-02-19 14:27:36,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:27:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:36,054 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) [2024-02-19 14:27:36,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-02-19 14:27:36,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:27:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:36,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:27:36,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:36,480 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:27:36,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:27:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:36,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:36,595 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:27:36,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:27:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:36,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751854341] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:36,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:36,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-02-19 14:27:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510675167] [2024-02-19 14:27:36,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:36,612 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-19 14:27:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-19 14:27:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-02-19 14:27:36,613 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:36,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 480 transitions, 42388 flow. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 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) [2024-02-19 14:27:36,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:36,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:36,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:37,314 INFO L124 PetriNetUnfolderBase]: 473/938 cut-off events. [2024-02-19 14:27:37,314 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-02-19 14:27:37,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42171 conditions, 938 events. 473/938 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5048 event pairs, 0 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 30794. Up to 929 conditions per place. [2024-02-19 14:27:37,334 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 277 selfloop transitions, 57 changer transitions 157/492 dead transitions. [2024-02-19 14:27:37,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 492 transitions, 44426 flow [2024-02-19 14:27:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:27:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:27:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2024-02-19 14:27:37,335 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3377926421404682 [2024-02-19 14:27:37,335 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 416 predicate places. [2024-02-19 14:27:37,335 INFO L507 AbstractCegarLoop]: Abstraction has has 439 places, 492 transitions, 44426 flow [2024-02-19 14:27:37,335 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 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) [2024-02-19 14:27:37,335 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:37,336 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:37,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:37,547 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-02-19 14:27:37,548 INFO L432 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:37,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1042921495, now seen corresponding path program 36 times [2024-02-19 14:27:37,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:37,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360504388] [2024-02-19 14:27:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360504388] [2024-02-19 14:27:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360504388] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188734227] [2024-02-19 14:27:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:27:37,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:37,913 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) [2024-02-19 14:27:37,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-02-19 14:27:38,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:27:38,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:38,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:38,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:38,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:38,218 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 65 treesize of output 41 [2024-02-19 14:27:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:38,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:38,360 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:27:38,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:27:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188734227] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:38,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:38,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:27:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667857354] [2024-02-19 14:27:38,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:38,381 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:38,381 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:38,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 492 transitions, 44426 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 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) [2024-02-19 14:27:38,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:38,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:38,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:39,265 INFO L124 PetriNetUnfolderBase]: 503/995 cut-off events. [2024-02-19 14:27:39,266 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-02-19 14:27:39,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45686 conditions, 995 events. 503/995 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5444 event pairs, 0 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 33594. Up to 985 conditions per place. [2024-02-19 14:27:39,283 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 290 selfloop transitions, 67 changer transitions 157/515 dead transitions. [2024-02-19 14:27:39,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 515 transitions, 47530 flow [2024-02-19 14:27:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:27:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:27:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 128 transitions. [2024-02-19 14:27:39,284 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-19 14:27:39,285 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 431 predicate places. [2024-02-19 14:27:39,285 INFO L507 AbstractCegarLoop]: Abstraction has has 454 places, 515 transitions, 47530 flow [2024-02-19 14:27:39,285 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 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) [2024-02-19 14:27:39,285 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:39,285 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:39,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:39,497 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-02-19 14:27:39,497 INFO L432 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:39,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1683117259, now seen corresponding path program 37 times [2024-02-19 14:27:39,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:39,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096299797] [2024-02-19 14:27:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:39,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:39,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096299797] [2024-02-19 14:27:39,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096299797] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:39,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621144163] [2024-02-19 14:27:39,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:27:39,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:39,855 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) [2024-02-19 14:27:39,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-02-19 14:27:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:40,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:40,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:40,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:40,133 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 46 treesize of output 34 [2024-02-19 14:27:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:40,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:40,273 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:40,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:40,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621144163] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:40,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:40,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-19 14:27:40,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097864121] [2024-02-19 14:27:40,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:40,321 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:40,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:40,322 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:40,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 515 transitions, 47530 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:40,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:40,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:40,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:40,952 INFO L124 PetriNetUnfolderBase]: 499/991 cut-off events. [2024-02-19 14:27:40,953 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-02-19 14:27:40,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46489 conditions, 991 events. 499/991 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5455 event pairs, 0 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 34136. Up to 981 conditions per place. [2024-02-19 14:27:40,976 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 325 selfloop transitions, 31 changer transitions 157/514 dead transitions. [2024-02-19 14:27:40,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 514 transitions, 48464 flow [2024-02-19 14:27:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-02-19 14:27:40,977 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3652173913043478 [2024-02-19 14:27:40,978 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 440 predicate places. [2024-02-19 14:27:40,978 INFO L507 AbstractCegarLoop]: Abstraction has has 463 places, 514 transitions, 48464 flow [2024-02-19 14:27:40,978 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:40,978 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:40,978 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:40,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:41,190 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-02-19 14:27:41,190 INFO L432 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:41,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash -241515594, now seen corresponding path program 38 times [2024-02-19 14:27:41,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:41,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689009934] [2024-02-19 14:27:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:41,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689009934] [2024-02-19 14:27:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689009934] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984811255] [2024-02-19 14:27:41,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:27:41,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:41,598 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) [2024-02-19 14:27:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-02-19 14:27:41,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:27:41,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:41,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:41,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:41,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:41,895 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 65 treesize of output 41 [2024-02-19 14:27:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:41,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:42,045 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:42,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:42,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984811255] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:42,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:42,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-19 14:27:42,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396197358] [2024-02-19 14:27:42,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:42,100 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:42,100 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:42,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 514 transitions, 48464 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 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) [2024-02-19 14:27:42,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:42,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:42,711 INFO L124 PetriNetUnfolderBase]: 509/1016 cut-off events. [2024-02-19 14:27:42,711 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-02-19 14:27:42,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48632 conditions, 1016 events. 509/1016 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5651 event pairs, 0 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 35630. Up to 1005 conditions per place. [2024-02-19 14:27:42,732 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 339 selfloop transitions, 30 changer transitions 157/527 dead transitions. [2024-02-19 14:27:42,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 527 transitions, 50747 flow [2024-02-19 14:27:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-02-19 14:27:42,733 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2024-02-19 14:27:42,733 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 448 predicate places. [2024-02-19 14:27:42,734 INFO L507 AbstractCegarLoop]: Abstraction has has 471 places, 527 transitions, 50747 flow [2024-02-19 14:27:42,734 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 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) [2024-02-19 14:27:42,734 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:42,734 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:42,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:42,936 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:42,936 INFO L432 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:42,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -764282894, now seen corresponding path program 39 times [2024-02-19 14:27:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784714391] [2024-02-19 14:27:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784714391] [2024-02-19 14:27:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784714391] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071571800] [2024-02-19 14:27:43,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:27:43,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:43,314 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) [2024-02-19 14:27:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-02-19 14:27:43,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:27:43,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:43,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:43,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:43,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:43,656 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 65 treesize of output 41 [2024-02-19 14:27:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:43,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:43,786 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:27:43,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:27:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:43,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071571800] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:43,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:43,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-19 14:27:43,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874822459] [2024-02-19 14:27:43,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:43,810 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:43,811 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:43,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 527 transitions, 50747 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:43,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:43,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:43,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:44,637 INFO L124 PetriNetUnfolderBase]: 521/1043 cut-off events. [2024-02-19 14:27:44,637 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-02-19 14:27:44,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50921 conditions, 1043 events. 521/1043 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5844 event pairs, 0 based on Foata normal form. 0/847 useless extension candidates. Maximal degree in co-relation 37156. Up to 1031 conditions per place. [2024-02-19 14:27:44,660 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 326 selfloop transitions, 53 changer transitions 159/539 dead transitions. [2024-02-19 14:27:44,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 539 transitions, 52984 flow [2024-02-19 14:27:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:27:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:27:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-02-19 14:27:44,661 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4031620553359684 [2024-02-19 14:27:44,662 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 458 predicate places. [2024-02-19 14:27:44,662 INFO L507 AbstractCegarLoop]: Abstraction has has 481 places, 539 transitions, 52984 flow [2024-02-19 14:27:44,662 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:44,662 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:44,662 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:44,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-02-19 14:27:44,873 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-02-19 14:27:44,873 INFO L432 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:44,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1445979637, now seen corresponding path program 40 times [2024-02-19 14:27:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925973394] [2024-02-19 14:27:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:45,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925973394] [2024-02-19 14:27:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925973394] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521150190] [2024-02-19 14:27:45,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:27:45,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:45,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:45,227 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) [2024-02-19 14:27:45,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-02-19 14:27:45,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:27:45,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:45,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:45,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:45,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:45,523 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 46 treesize of output 34 [2024-02-19 14:27:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:45,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:45,691 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-19 14:27:45,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-02-19 14:27:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521150190] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:45,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-19 14:27:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270435797] [2024-02-19 14:27:45,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:45,699 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:27:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:27:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:27:45,699 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 539 transitions, 52984 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:46,501 INFO L124 PetriNetUnfolderBase]: 511/1022 cut-off events. [2024-02-19 14:27:46,501 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-02-19 14:27:46,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50954 conditions, 1022 events. 511/1022 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5708 event pairs, 0 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 37514. Up to 1011 conditions per place. [2024-02-19 14:27:46,522 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 304 selfloop transitions, 63 changer transitions 163/531 dead transitions. [2024-02-19 14:27:46,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 531 transitions, 53254 flow [2024-02-19 14:27:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:27:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:27:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-02-19 14:27:46,523 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3416149068322981 [2024-02-19 14:27:46,523 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 470 predicate places. [2024-02-19 14:27:46,524 INFO L507 AbstractCegarLoop]: Abstraction has has 493 places, 531 transitions, 53254 flow [2024-02-19 14:27:46,524 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:46,524 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:46,524 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:46,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:46,735 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-02-19 14:27:46,736 INFO L432 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:46,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1946667582, now seen corresponding path program 41 times [2024-02-19 14:27:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:46,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813938629] [2024-02-19 14:27:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813938629] [2024-02-19 14:27:47,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813938629] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160396674] [2024-02-19 14:27:47,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:27:47,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:47,125 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) [2024-02-19 14:27:47,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-02-19 14:27:47,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:27:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:47,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:27:47,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:47,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:47,486 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 46 treesize of output 34 [2024-02-19 14:27:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:47,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:47,645 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-19 14:27:47,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-02-19 14:27:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:47,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160396674] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:47,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:47,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-02-19 14:27:47,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196502009] [2024-02-19 14:27:47,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:47,688 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-19 14:27:47,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:47,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-19 14:27:47,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-02-19 14:27:47,689 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:47,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 531 transitions, 53254 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:47,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:47,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:47,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:48,445 INFO L124 PetriNetUnfolderBase]: 505/1007 cut-off events. [2024-02-19 14:27:48,446 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-02-19 14:27:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51254 conditions, 1007 events. 505/1007 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5575 event pairs, 0 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 37856. Up to 997 conditions per place. [2024-02-19 14:27:48,515 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 309 selfloop transitions, 51 changer transitions 163/524 dead transitions. [2024-02-19 14:27:48,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 524 transitions, 53594 flow [2024-02-19 14:27:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:27:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:27:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-02-19 14:27:48,518 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40096618357487923 [2024-02-19 14:27:48,518 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 477 predicate places. [2024-02-19 14:27:48,518 INFO L507 AbstractCegarLoop]: Abstraction has has 500 places, 524 transitions, 53594 flow [2024-02-19 14:27:48,518 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:48,518 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:48,518 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:48,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-02-19 14:27:48,730 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-02-19 14:27:48,730 INFO L432 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:48,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 804645648, now seen corresponding path program 42 times [2024-02-19 14:27:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:48,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016577512] [2024-02-19 14:27:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:27:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016577512] [2024-02-19 14:27:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016577512] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639263909] [2024-02-19 14:27:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:27:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:49,342 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) [2024-02-19 14:27:49,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-02-19 14:27:49,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:27:49,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:49,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 36 conjunts are in the unsatisfiable core [2024-02-19 14:27:49,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:49,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:49,875 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 46 treesize of output 30 [2024-02-19 14:27:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:49,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:50,049 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:50,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:50,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639263909] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:50,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:50,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2024-02-19 14:27:50,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142044473] [2024-02-19 14:27:50,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:50,098 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:27:50,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:27:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:27:50,099 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:50,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 524 transitions, 53594 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2024-02-19 14:27:50,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:50,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:50,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:50,911 INFO L124 PetriNetUnfolderBase]: 487/978 cut-off events. [2024-02-19 14:27:50,911 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-02-19 14:27:50,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50797 conditions, 978 events. 487/978 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5449 event pairs, 0 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 37870. Up to 969 conditions per place. [2024-02-19 14:27:50,934 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 295 selfloop transitions, 40 changer transitions 177/513 dead transitions. [2024-02-19 14:27:50,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 513 transitions, 53490 flow [2024-02-19 14:27:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 14:27:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 14:27:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 132 transitions. [2024-02-19 14:27:50,935 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3375959079283887 [2024-02-19 14:27:50,935 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 493 predicate places. [2024-02-19 14:27:50,935 INFO L507 AbstractCegarLoop]: Abstraction has has 516 places, 513 transitions, 53490 flow [2024-02-19 14:27:50,936 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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) [2024-02-19 14:27:50,936 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:50,936 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:50,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:51,147 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:51,148 INFO L432 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:51,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash -779371172, now seen corresponding path program 43 times [2024-02-19 14:27:51,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:51,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104086951] [2024-02-19 14:27:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:51,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104086951] [2024-02-19 14:27:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104086951] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138705565] [2024-02-19 14:27:51,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:27:51,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:51,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:51,604 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) [2024-02-19 14:27:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-02-19 14:27:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:51,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:51,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:51,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:51,921 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 46 treesize of output 34 [2024-02-19 14:27:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:51,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:52,071 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:52,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138705565] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:52,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:52,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-19 14:27:52,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32154760] [2024-02-19 14:27:52,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:52,100 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:52,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:52,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:52,101 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:52,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 513 transitions, 53490 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:52,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:52,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:52,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:52,864 INFO L124 PetriNetUnfolderBase]: 495/992 cut-off events. [2024-02-19 14:27:52,865 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-02-19 14:27:52,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52515 conditions, 992 events. 495/992 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5533 event pairs, 0 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 39128. Up to 983 conditions per place. [2024-02-19 14:27:52,889 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 311 selfloop transitions, 30 changer transitions 177/519 dead transitions. [2024-02-19 14:27:52,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 519 transitions, 55153 flow [2024-02-19 14:27:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:27:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:27:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-02-19 14:27:52,890 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3779264214046823 [2024-02-19 14:27:52,891 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 505 predicate places. [2024-02-19 14:27:52,891 INFO L507 AbstractCegarLoop]: Abstraction has has 528 places, 519 transitions, 55153 flow [2024-02-19 14:27:52,891 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:52,891 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:52,891 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:52,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:53,102 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:53,103 INFO L432 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1342501226, now seen corresponding path program 44 times [2024-02-19 14:27:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747300433] [2024-02-19 14:27:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:53,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:53,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747300433] [2024-02-19 14:27:53,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747300433] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:53,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577331331] [2024-02-19 14:27:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:27:53,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:53,452 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) [2024-02-19 14:27:53,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-02-19 14:27:53,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:27:53,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:53,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:27:53,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:53,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:27:53,773 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 65 treesize of output 41 [2024-02-19 14:27:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:53,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:53,896 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:53,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:27:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577331331] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:53,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-19 14:27:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911009230] [2024-02-19 14:27:53,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:53,972 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:27:53,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:27:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:27:53,974 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:53,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 519 transitions, 55153 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:53,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:53,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:53,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:54,756 INFO L124 PetriNetUnfolderBase]: 491/979 cut-off events. [2024-02-19 14:27:54,761 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-02-19 14:27:54,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52853 conditions, 979 events. 491/979 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5423 event pairs, 0 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 39434. Up to 971 conditions per place. [2024-02-19 14:27:54,783 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 303 selfloop transitions, 28 changer transitions 179/511 dead transitions. [2024-02-19 14:27:54,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 511 transitions, 55319 flow [2024-02-19 14:27:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-02-19 14:27:54,784 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3652173913043478 [2024-02-19 14:27:54,784 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 514 predicate places. [2024-02-19 14:27:54,784 INFO L507 AbstractCegarLoop]: Abstraction has has 537 places, 511 transitions, 55319 flow [2024-02-19 14:27:54,785 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:54,785 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:54,785 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:54,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:54,996 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:54,997 INFO L432 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:54,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:54,997 INFO L85 PathProgramCache]: Analyzing trace with hash 215105133, now seen corresponding path program 45 times [2024-02-19 14:27:54,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:54,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109302411] [2024-02-19 14:27:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:54,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:55,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:55,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109302411] [2024-02-19 14:27:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109302411] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662553151] [2024-02-19 14:27:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:27:55,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:55,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:55,327 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) [2024-02-19 14:27:55,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-02-19 14:27:55,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:27:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:55,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:27:55,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:55,652 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-19 14:27:55,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:27:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:55,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:55,743 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:55,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:55,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662553151] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:55,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:55,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-02-19 14:27:55,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518514137] [2024-02-19 14:27:55,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:55,784 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-19 14:27:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-19 14:27:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-02-19 14:27:55,785 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:55,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 511 transitions, 55319 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:55,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:55,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:55,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:56,482 INFO L124 PetriNetUnfolderBase]: 491/972 cut-off events. [2024-02-19 14:27:56,483 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-02-19 14:27:56,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53496 conditions, 972 events. 491/972 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5342 event pairs, 0 based on Foata normal form. 0/810 useless extension candidates. Maximal degree in co-relation 40274. Up to 965 conditions per place. [2024-02-19 14:27:56,509 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 300 selfloop transitions, 28 changer transitions 179/508 dead transitions. [2024-02-19 14:27:56,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 508 transitions, 56003 flow [2024-02-19 14:27:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 14:27:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 14:27:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2024-02-19 14:27:56,511 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-02-19 14:27:56,511 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 521 predicate places. [2024-02-19 14:27:56,511 INFO L507 AbstractCegarLoop]: Abstraction has has 544 places, 508 transitions, 56003 flow [2024-02-19 14:27:56,511 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:56,511 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:56,511 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:56,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:56,723 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-02-19 14:27:56,724 INFO L432 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:56,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -152663024, now seen corresponding path program 46 times [2024-02-19 14:27:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:56,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413666651] [2024-02-19 14:27:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:56,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:27:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:27:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:27:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413666651] [2024-02-19 14:27:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413666651] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:27:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028570667] [2024-02-19 14:27:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:27:57,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:27:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:27:57,730 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:27:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-02-19 14:27:57,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:27:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:27:57,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 14:27:57,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:27:58,071 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:27:58,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:27:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:58,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:27:58,177 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:27:58,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:27:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:27:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028570667] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:27:58,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:27:58,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 7] total 28 [2024-02-19 14:27:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277834012] [2024-02-19 14:27:58,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:27:58,219 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-19 14:27:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:27:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-19 14:27:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-02-19 14:27:58,220 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:27:58,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 508 transitions, 56003 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:58,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:27:58,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:27:58,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:27:59,080 INFO L124 PetriNetUnfolderBase]: 493/971 cut-off events. [2024-02-19 14:27:59,080 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-02-19 14:27:59,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54465 conditions, 971 events. 493/971 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5339 event pairs, 0 based on Foata normal form. 0/813 useless extension candidates. Maximal degree in co-relation 41118. Up to 965 conditions per place. [2024-02-19 14:27:59,105 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 286 selfloop transitions, 41 changer transitions 179/507 dead transitions. [2024-02-19 14:27:59,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 507 transitions, 56902 flow [2024-02-19 14:27:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:27:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:27:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 101 transitions. [2024-02-19 14:27:59,106 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3136645962732919 [2024-02-19 14:27:59,106 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 532 predicate places. [2024-02-19 14:27:59,106 INFO L507 AbstractCegarLoop]: Abstraction has has 555 places, 507 transitions, 56902 flow [2024-02-19 14:27:59,107 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:27:59,107 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:27:59,107 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:27:59,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-02-19 14:27:59,318 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-02-19 14:27:59,318 INFO L432 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:27:59,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:27:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash 157155500, now seen corresponding path program 47 times [2024-02-19 14:27:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:27:59,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78902113] [2024-02-19 14:27:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:27:59,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:27:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:28:00,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:00,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78902113] [2024-02-19 14:28:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78902113] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:00,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718727002] [2024-02-19 14:28:00,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:28:00,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:00,348 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:00,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-02-19 14:28:00,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:28:00,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:00,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:28:00,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:00,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:00,852 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 31 treesize of output 23 [2024-02-19 14:28:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:00,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:01,194 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:28:01,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-02-19 14:28:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718727002] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:01,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 10] total 41 [2024-02-19 14:28:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607939453] [2024-02-19 14:28:01,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:01,273 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-19 14:28:01,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-19 14:28:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2024-02-19 14:28:01,274 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:01,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 507 transitions, 56902 flow. Second operand has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:01,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:01,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:01,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:02,862 INFO L124 PetriNetUnfolderBase]: 649/1249 cut-off events. [2024-02-19 14:28:02,862 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-02-19 14:28:02,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71251 conditions, 1249 events. 649/1249 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7172 event pairs, 0 based on Foata normal form. 1/1040 useless extension candidates. Maximal degree in co-relation 53142. Up to 1242 conditions per place. [2024-02-19 14:28:02,895 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 349 selfloop transitions, 88 changer transitions 183/621 dead transitions. [2024-02-19 14:28:02,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 621 transitions, 70973 flow [2024-02-19 14:28:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:28:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:28:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 154 transitions. [2024-02-19 14:28:02,896 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3347826086956522 [2024-02-19 14:28:02,896 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 551 predicate places. [2024-02-19 14:28:02,896 INFO L507 AbstractCegarLoop]: Abstraction has has 574 places, 621 transitions, 70973 flow [2024-02-19 14:28:02,897 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:02,897 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:02,897 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:02,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:03,109 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-02-19 14:28:03,109 INFO L432 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:03,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash -377581652, now seen corresponding path program 48 times [2024-02-19 14:28:03,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:03,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99402639] [2024-02-19 14:28:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99402639] [2024-02-19 14:28:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99402639] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731776738] [2024-02-19 14:28:03,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:28:03,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:03,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:03,500 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:03,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-02-19 14:28:03,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:28:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:03,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:28:03,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:03,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:03,861 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 27 treesize of output 19 [2024-02-19 14:28:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:03,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:04,149 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:04,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731776738] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:04,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2024-02-19 14:28:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139284512] [2024-02-19 14:28:04,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:04,237 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:28:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:28:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:28:04,238 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:04,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 621 transitions, 70973 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 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) [2024-02-19 14:28:04,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:04,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:04,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:05,700 INFO L124 PetriNetUnfolderBase]: 729/1398 cut-off events. [2024-02-19 14:28:05,700 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-02-19 14:28:05,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81042 conditions, 1398 events. 729/1398 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7969 event pairs, 0 based on Foata normal form. 3/1141 useless extension candidates. Maximal degree in co-relation 59874. Up to 1389 conditions per place. [2024-02-19 14:28:05,730 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 403 selfloop transitions, 75 changer transitions 189/668 dead transitions. [2024-02-19 14:28:05,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 668 transitions, 77698 flow [2024-02-19 14:28:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-19 14:28:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-19 14:28:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 197 transitions. [2024-02-19 14:28:05,731 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4078674948240166 [2024-02-19 14:28:05,731 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 571 predicate places. [2024-02-19 14:28:05,731 INFO L507 AbstractCegarLoop]: Abstraction has has 594 places, 668 transitions, 77698 flow [2024-02-19 14:28:05,732 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 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) [2024-02-19 14:28:05,732 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:05,732 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:05,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-02-19 14:28:05,943 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-02-19 14:28:05,943 INFO L432 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:05,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1870501752, now seen corresponding path program 49 times [2024-02-19 14:28:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402994617] [2024-02-19 14:28:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:06,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:06,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402994617] [2024-02-19 14:28:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402994617] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:06,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508904364] [2024-02-19 14:28:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:28:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:06,405 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-02-19 14:28:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:06,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:28:06,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:06,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:06,763 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 35 treesize of output 23 [2024-02-19 14:28:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:06,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:07,121 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:07,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:28:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508904364] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:07,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:07,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-02-19 14:28:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741111137] [2024-02-19 14:28:07,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:07,175 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:28:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:28:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:28:07,176 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:07,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 668 transitions, 77698 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:07,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:07,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:07,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:08,539 INFO L124 PetriNetUnfolderBase]: 748/1434 cut-off events. [2024-02-19 14:28:08,539 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-02-19 14:28:08,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84565 conditions, 1434 events. 748/1434 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 8219 event pairs, 6 based on Foata normal form. 1/1165 useless extension candidates. Maximal degree in co-relation 62263. Up to 1425 conditions per place. [2024-02-19 14:28:08,569 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 428 selfloop transitions, 64 changer transitions 192/685 dead transitions. [2024-02-19 14:28:08,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 685 transitions, 81050 flow [2024-02-19 14:28:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:28:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:28:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2024-02-19 14:28:08,570 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37577639751552794 [2024-02-19 14:28:08,570 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 584 predicate places. [2024-02-19 14:28:08,570 INFO L507 AbstractCegarLoop]: Abstraction has has 607 places, 685 transitions, 81050 flow [2024-02-19 14:28:08,570 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:08,570 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:08,571 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:08,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-02-19 14:28:08,782 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-02-19 14:28:08,782 INFO L432 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:08,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:08,782 INFO L85 PathProgramCache]: Analyzing trace with hash 399848334, now seen corresponding path program 50 times [2024-02-19 14:28:08,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:08,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144053660] [2024-02-19 14:28:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:08,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144053660] [2024-02-19 14:28:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144053660] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433347589] [2024-02-19 14:28:09,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:28:09,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:09,158 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:09,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-02-19 14:28:09,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:28:09,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:09,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 45 conjunts are in the unsatisfiable core [2024-02-19 14:28:09,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:09,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:09,498 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 27 treesize of output 19 [2024-02-19 14:28:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:28:09,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:09,782 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:09,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:28:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:09,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433347589] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:09,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:09,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 22 [2024-02-19 14:28:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594117556] [2024-02-19 14:28:09,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:09,861 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:28:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:28:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:28:09,861 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:09,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 685 transitions, 81050 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:09,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:09,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:09,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:11,087 INFO L124 PetriNetUnfolderBase]: 754/1449 cut-off events. [2024-02-19 14:28:11,087 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-02-19 14:28:11,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86899 conditions, 1449 events. 754/1449 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8370 event pairs, 0 based on Foata normal form. 1/1176 useless extension candidates. Maximal degree in co-relation 63678. Up to 1440 conditions per place. [2024-02-19 14:28:11,270 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 426 selfloop transitions, 69 changer transitions 195/691 dead transitions. [2024-02-19 14:28:11,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 691 transitions, 83144 flow [2024-02-19 14:28:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 14:28:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 14:28:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 120 transitions. [2024-02-19 14:28:11,271 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-19 14:28:11,272 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 598 predicate places. [2024-02-19 14:28:11,272 INFO L507 AbstractCegarLoop]: Abstraction has has 621 places, 691 transitions, 83144 flow [2024-02-19 14:28:11,272 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:11,272 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:11,272 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:11,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-02-19 14:28:11,483 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-02-19 14:28:11,484 INFO L432 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:11,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash 579727020, now seen corresponding path program 51 times [2024-02-19 14:28:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766551958] [2024-02-19 14:28:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:11,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:28:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:12,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766551958] [2024-02-19 14:28:12,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766551958] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:12,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196065674] [2024-02-19 14:28:12,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:28:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:12,162 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:12,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-02-19 14:28:12,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:28:12,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:12,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:28:12,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:12,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:12,541 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 27 treesize of output 19 [2024-02-19 14:28:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:12,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:12,796 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:12,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196065674] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:12,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:12,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 29 [2024-02-19 14:28:12,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754970444] [2024-02-19 14:28:12,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:12,888 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:28:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:28:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:28:12,889 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:12,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 691 transitions, 83144 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:12,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:12,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:12,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:14,576 INFO L124 PetriNetUnfolderBase]: 814/1558 cut-off events. [2024-02-19 14:28:14,576 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-02-19 14:28:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94943 conditions, 1558 events. 814/1558 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 9095 event pairs, 4 based on Foata normal form. 2/1252 useless extension candidates. Maximal degree in co-relation 69619. Up to 1548 conditions per place. [2024-02-19 14:28:14,622 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 433 selfloop transitions, 96 changer transitions 197/727 dead transitions. [2024-02-19 14:28:14,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 727 transitions, 88934 flow [2024-02-19 14:28:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 14:28:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 14:28:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 210 transitions. [2024-02-19 14:28:14,624 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3511705685618729 [2024-02-19 14:28:14,624 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 623 predicate places. [2024-02-19 14:28:14,624 INFO L507 AbstractCegarLoop]: Abstraction has has 646 places, 727 transitions, 88934 flow [2024-02-19 14:28:14,625 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:14,625 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:14,625 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:14,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-02-19 14:28:14,827 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:14,827 INFO L432 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:14,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1004289800, now seen corresponding path program 52 times [2024-02-19 14:28:14,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962024842] [2024-02-19 14:28:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:15,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:15,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962024842] [2024-02-19 14:28:15,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962024842] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:15,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473453338] [2024-02-19 14:28:15,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:28:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:15,492 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:15,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-02-19 14:28:15,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:28:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:15,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:28:15,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:15,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:15,852 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 35 treesize of output 23 [2024-02-19 14:28:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:15,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:16,149 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:16,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473453338] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:16,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-02-19 14:28:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064014265] [2024-02-19 14:28:16,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:16,219 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:28:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:28:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:28:16,220 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:16,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 727 transitions, 88934 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:16,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:16,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:16,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:17,814 INFO L124 PetriNetUnfolderBase]: 818/1576 cut-off events. [2024-02-19 14:28:17,815 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-02-19 14:28:17,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97617 conditions, 1576 events. 818/1576 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9270 event pairs, 2 based on Foata normal form. 2/1266 useless extension candidates. Maximal degree in co-relation 71504. Up to 1566 conditions per place. [2024-02-19 14:28:17,862 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 450 selfloop transitions, 82 changer transitions 207/740 dead transitions. [2024-02-19 14:28:17,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 740 transitions, 92010 flow [2024-02-19 14:28:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 14:28:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 14:28:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 195 transitions. [2024-02-19 14:28:17,864 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3686200378071834 [2024-02-19 14:28:17,864 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 645 predicate places. [2024-02-19 14:28:17,864 INFO L507 AbstractCegarLoop]: Abstraction has has 668 places, 740 transitions, 92010 flow [2024-02-19 14:28:17,864 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:17,864 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:17,864 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:17,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:18,076 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:18,077 INFO L432 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:18,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1147820112, now seen corresponding path program 53 times [2024-02-19 14:28:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:18,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955143130] [2024-02-19 14:28:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:18,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:18,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955143130] [2024-02-19 14:28:18,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955143130] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:18,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376525086] [2024-02-19 14:28:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:28:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:18,509 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:18,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-02-19 14:28:18,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:28:18,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:18,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:28:18,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:19,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:19,011 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 31 treesize of output 23 [2024-02-19 14:28:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:19,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:19,308 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:19,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-02-19 14:28:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:19,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376525086] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:19,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:19,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-02-19 14:28:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002221214] [2024-02-19 14:28:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:19,399 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:28:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:19,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:28:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:28:19,400 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:19,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 740 transitions, 92010 flow. Second operand has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:19,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:19,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:19,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:21,123 INFO L124 PetriNetUnfolderBase]: 906/1734 cut-off events. [2024-02-19 14:28:21,124 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2024-02-19 14:28:21,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109093 conditions, 1734 events. 906/1734 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10342 event pairs, 0 based on Foata normal form. 3/1377 useless extension candidates. Maximal degree in co-relation 80217. Up to 1723 conditions per place. [2024-02-19 14:28:21,177 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 529 selfloop transitions, 55 changer transitions 213/798 dead transitions. [2024-02-19 14:28:21,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 798 transitions, 100823 flow [2024-02-19 14:28:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-19 14:28:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-19 14:28:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 165 transitions. [2024-02-19 14:28:21,178 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3416149068322981 [2024-02-19 14:28:21,178 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 665 predicate places. [2024-02-19 14:28:21,179 INFO L507 AbstractCegarLoop]: Abstraction has has 688 places, 798 transitions, 100823 flow [2024-02-19 14:28:21,179 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:21,179 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:21,179 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:21,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:21,391 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:21,391 INFO L432 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:21,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1427602612, now seen corresponding path program 54 times [2024-02-19 14:28:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:21,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943159432] [2024-02-19 14:28:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:28:22,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943159432] [2024-02-19 14:28:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943159432] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642080329] [2024-02-19 14:28:22,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:28:22,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:22,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:22,527 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:22,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-02-19 14:28:22,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:28:22,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:22,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:28:22,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:22,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:22,932 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 27 treesize of output 19 [2024-02-19 14:28:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:22,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:23,252 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:23,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:28:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642080329] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:23,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 31 [2024-02-19 14:28:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614425252] [2024-02-19 14:28:23,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:23,347 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:28:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:28:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:28:23,348 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:23,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 798 transitions, 100823 flow. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:23,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:23,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:23,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:25,724 INFO L124 PetriNetUnfolderBase]: 981/1873 cut-off events. [2024-02-19 14:28:25,725 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2024-02-19 14:28:25,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119669 conditions, 1873 events. 981/1873 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11387 event pairs, 4 based on Foata normal form. 2/1473 useless extension candidates. Maximal degree in co-relation 87442. Up to 1861 conditions per place. [2024-02-19 14:28:25,783 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 557 selfloop transitions, 72 changer transitions 221/851 dead transitions. [2024-02-19 14:28:25,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 851 transitions, 109237 flow [2024-02-19 14:28:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-19 14:28:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-19 14:28:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 197 transitions. [2024-02-19 14:28:25,784 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3426086956521739 [2024-02-19 14:28:25,784 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 689 predicate places. [2024-02-19 14:28:25,784 INFO L507 AbstractCegarLoop]: Abstraction has has 712 places, 851 transitions, 109237 flow [2024-02-19 14:28:25,785 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:25,785 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:25,785 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:25,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-02-19 14:28:25,997 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-02-19 14:28:25,997 INFO L432 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:25,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1415679628, now seen corresponding path program 55 times [2024-02-19 14:28:25,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:25,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016358721] [2024-02-19 14:28:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:28:27,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:27,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016358721] [2024-02-19 14:28:27,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016358721] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:27,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22459658] [2024-02-19 14:28:27,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:28:27,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:27,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:27,197 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:27,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-02-19 14:28:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:27,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:28:27,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:27,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:27,608 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 35 treesize of output 23 [2024-02-19 14:28:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:27,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:28,024 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:28,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:28:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:28,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22459658] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:28,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:28,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 38 [2024-02-19 14:28:28,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757208992] [2024-02-19 14:28:28,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:28,103 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-19 14:28:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-19 14:28:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2024-02-19 14:28:28,104 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:28,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 851 transitions, 109237 flow. Second operand has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:28,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:28,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:28,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:30,550 INFO L124 PetriNetUnfolderBase]: 990/1914 cut-off events. [2024-02-19 14:28:30,551 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2024-02-19 14:28:30,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124145 conditions, 1914 events. 990/1914 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11844 event pairs, 0 based on Foata normal form. 3/1507 useless extension candidates. Maximal degree in co-relation 90563. Up to 1901 conditions per place. [2024-02-19 14:28:30,605 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 575 selfloop transitions, 71 changer transitions 236/883 dead transitions. [2024-02-19 14:28:30,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 883 transitions, 115121 flow [2024-02-19 14:28:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 14:28:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 14:28:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 186 transitions. [2024-02-19 14:28:30,607 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3110367892976589 [2024-02-19 14:28:30,607 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 714 predicate places. [2024-02-19 14:28:30,607 INFO L507 AbstractCegarLoop]: Abstraction has has 737 places, 883 transitions, 115121 flow [2024-02-19 14:28:30,607 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:30,607 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:30,607 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:30,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-02-19 14:28:30,819 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-02-19 14:28:30,819 INFO L432 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:30,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1358336370, now seen corresponding path program 56 times [2024-02-19 14:28:30,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:30,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332435266] [2024-02-19 14:28:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:31,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:31,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332435266] [2024-02-19 14:28:31,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332435266] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:31,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420619] [2024-02-19 14:28:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:28:31,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:31,228 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:31,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-02-19 14:28:31,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:28:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:31,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 45 conjunts are in the unsatisfiable core [2024-02-19 14:28:31,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:31,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:31,643 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 27 treesize of output 19 [2024-02-19 14:28:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:28:31,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:31,993 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:31,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-02-19 14:28:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:32,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420619] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:32,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:32,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-02-19 14:28:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093911807] [2024-02-19 14:28:32,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:32,076 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:28:32,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:28:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:28:32,077 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:32,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 883 transitions, 115121 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:32,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:32,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:32,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:34,588 INFO L124 PetriNetUnfolderBase]: 1008/1961 cut-off events. [2024-02-19 14:28:34,588 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2024-02-19 14:28:34,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129098 conditions, 1961 events. 1008/1961 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12282 event pairs, 2 based on Foata normal form. 2/1541 useless extension candidates. Maximal degree in co-relation 93144. Up to 1947 conditions per place. [2024-02-19 14:28:34,656 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 595 selfloop transitions, 66 changer transitions 243/905 dead transitions. [2024-02-19 14:28:34,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 905 transitions, 119810 flow [2024-02-19 14:28:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-19 14:28:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-19 14:28:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 177 transitions. [2024-02-19 14:28:34,658 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36645962732919257 [2024-02-19 14:28:34,658 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 734 predicate places. [2024-02-19 14:28:34,658 INFO L507 AbstractCegarLoop]: Abstraction has has 757 places, 905 transitions, 119810 flow [2024-02-19 14:28:34,658 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:34,659 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:34,659 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:34,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:34,871 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:34,871 INFO L432 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1326827058, now seen corresponding path program 57 times [2024-02-19 14:28:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442818034] [2024-02-19 14:28:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:28:35,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442818034] [2024-02-19 14:28:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442818034] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088101342] [2024-02-19 14:28:35,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:28:35,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:35,637 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:35,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-02-19 14:28:35,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:28:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:35,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:28:35,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:36,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:36,072 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 27 treesize of output 19 [2024-02-19 14:28:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:36,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:36,378 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:36,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088101342] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:36,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:36,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 31 [2024-02-19 14:28:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410906562] [2024-02-19 14:28:36,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:36,468 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:28:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:28:36,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:28:36,469 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:36,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 905 transitions, 119810 flow. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:36,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:36,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:36,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:38,937 INFO L124 PetriNetUnfolderBase]: 1056/2050 cut-off events. [2024-02-19 14:28:38,938 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2024-02-19 14:28:38,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136957 conditions, 2050 events. 1056/2050 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12915 event pairs, 6 based on Foata normal form. 2/1600 useless extension candidates. Maximal degree in co-relation 98575. Up to 2035 conditions per place. [2024-02-19 14:28:39,003 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 620 selfloop transitions, 68 changer transitions 246/935 dead transitions. [2024-02-19 14:28:39,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 935 transitions, 125656 flow [2024-02-19 14:28:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 14:28:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 14:28:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 196 transitions. [2024-02-19 14:28:39,005 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3277591973244147 [2024-02-19 14:28:39,005 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 759 predicate places. [2024-02-19 14:28:39,005 INFO L507 AbstractCegarLoop]: Abstraction has has 782 places, 935 transitions, 125656 flow [2024-02-19 14:28:39,005 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:39,005 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:39,005 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:39,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:39,217 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:39,218 INFO L432 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:39,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1729885200, now seen corresponding path program 58 times [2024-02-19 14:28:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:39,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720732926] [2024-02-19 14:28:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:28:40,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:40,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720732926] [2024-02-19 14:28:40,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720732926] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:40,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361295161] [2024-02-19 14:28:40,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:28:40,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:40,181 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:40,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-02-19 14:28:40,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:28:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:40,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:28:40,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:40,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:40,553 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 35 treesize of output 23 [2024-02-19 14:28:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:40,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:40,828 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:40,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361295161] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:40,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:40,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 38 [2024-02-19 14:28:40,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889960866] [2024-02-19 14:28:40,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:40,919 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-19 14:28:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-19 14:28:40,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-02-19 14:28:40,920 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:40,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 935 transitions, 125656 flow. Second operand has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:40,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:40,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:43,482 INFO L124 PetriNetUnfolderBase]: 1068/2080 cut-off events. [2024-02-19 14:28:43,482 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2024-02-19 14:28:43,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141044 conditions, 2080 events. 1068/2080 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13201 event pairs, 2 based on Foata normal form. 2/1622 useless extension candidates. Maximal degree in co-relation 100862. Up to 2065 conditions per place. [2024-02-19 14:28:43,533 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 628 selfloop transitions, 68 changer transitions 250/947 dead transitions. [2024-02-19 14:28:43,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 947 transitions, 129168 flow [2024-02-19 14:28:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 14:28:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 14:28:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 179 transitions. [2024-02-19 14:28:43,534 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3383742911153119 [2024-02-19 14:28:43,534 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 781 predicate places. [2024-02-19 14:28:43,535 INFO L507 AbstractCegarLoop]: Abstraction has has 804 places, 947 transitions, 129168 flow [2024-02-19 14:28:43,535 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:43,535 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:43,535 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:43,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-02-19 14:28:43,746 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-02-19 14:28:43,747 INFO L432 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:43,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -43050806, now seen corresponding path program 59 times [2024-02-19 14:28:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:43,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719322816] [2024-02-19 14:28:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719322816] [2024-02-19 14:28:44,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719322816] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099382973] [2024-02-19 14:28:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:28:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:44,175 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:44,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-02-19 14:28:44,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:28:44,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:44,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:28:44,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:44,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:44,620 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 31 treesize of output 23 [2024-02-19 14:28:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:44,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:44,933 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:28:44,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:28:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099382973] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:45,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:45,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-02-19 14:28:45,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665123879] [2024-02-19 14:28:45,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:45,022 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:28:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:28:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:28:45,023 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:45,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 947 transitions, 129168 flow. Second operand has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:45,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:45,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:45,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:47,707 INFO L124 PetriNetUnfolderBase]: 1086/2125 cut-off events. [2024-02-19 14:28:47,707 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2024-02-19 14:28:47,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146229 conditions, 2125 events. 1086/2125 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13593 event pairs, 6 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 103587. Up to 2110 conditions per place. [2024-02-19 14:28:47,772 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 647 selfloop transitions, 60 changer transitions 260/968 dead transitions. [2024-02-19 14:28:47,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 968 transitions, 133979 flow [2024-02-19 14:28:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:28:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:28:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-02-19 14:28:47,792 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-19 14:28:47,793 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 800 predicate places. [2024-02-19 14:28:47,793 INFO L507 AbstractCegarLoop]: Abstraction has has 823 places, 968 transitions, 133979 flow [2024-02-19 14:28:47,793 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:47,793 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:47,793 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:47,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:48,006 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-02-19 14:28:48,006 INFO L432 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:48,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2048025560, now seen corresponding path program 60 times [2024-02-19 14:28:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:48,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304754108] [2024-02-19 14:28:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:48,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:28:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:48,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304754108] [2024-02-19 14:28:48,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304754108] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398244552] [2024-02-19 14:28:48,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:28:48,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:48,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:48,936 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:48,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-02-19 14:28:49,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:28:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:49,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:28:49,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:49,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:49,334 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 27 treesize of output 19 [2024-02-19 14:28:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:49,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:49,673 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:28:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-02-19 14:28:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:49,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398244552] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:49,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:49,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 33 [2024-02-19 14:28:49,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796257731] [2024-02-19 14:28:49,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:49,719 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 14:28:49,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 14:28:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 14:28:49,720 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:49,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 968 transitions, 133979 flow. Second operand has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:49,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:49,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:49,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:52,579 INFO L124 PetriNetUnfolderBase]: 1194/2316 cut-off events. [2024-02-19 14:28:52,579 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-02-19 14:28:52,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161586 conditions, 2316 events. 1194/2316 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15028 event pairs, 2 based on Foata normal form. 1/1795 useless extension candidates. Maximal degree in co-relation 116288. Up to 2299 conditions per place. [2024-02-19 14:28:52,655 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 645 selfloop transitions, 129 changer transitions 262/1037 dead transitions. [2024-02-19 14:28:52,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 1037 transitions, 145591 flow [2024-02-19 14:28:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:28:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:28:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 141 transitions. [2024-02-19 14:28:52,657 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3065217391304348 [2024-02-19 14:28:52,657 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 819 predicate places. [2024-02-19 14:28:52,657 INFO L507 AbstractCegarLoop]: Abstraction has has 842 places, 1037 transitions, 145591 flow [2024-02-19 14:28:52,657 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:52,657 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:52,658 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:52,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:52,869 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:52,870 INFO L432 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:52,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:52,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1173373912, now seen corresponding path program 61 times [2024-02-19 14:28:52,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:52,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81089618] [2024-02-19 14:28:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:52,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:53,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81089618] [2024-02-19 14:28:53,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81089618] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:53,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297660131] [2024-02-19 14:28:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:28:53,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:53,362 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:53,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-02-19 14:28:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:53,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:28:53,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:53,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:53,757 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 35 treesize of output 23 [2024-02-19 14:28:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:53,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:54,068 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:54,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:54,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297660131] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:54,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:54,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-02-19 14:28:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783877868] [2024-02-19 14:28:54,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:54,145 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:28:54,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:28:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:28:54,146 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:54,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 842 places, 1037 transitions, 145591 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:54,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:54,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:28:57,514 INFO L124 PetriNetUnfolderBase]: 1274/2465 cut-off events. [2024-02-19 14:28:57,514 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2024-02-19 14:28:57,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174345 conditions, 2465 events. 1274/2465 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16042 event pairs, 6 based on Foata normal form. 3/1896 useless extension candidates. Maximal degree in co-relation 125049. Up to 2446 conditions per place. [2024-02-19 14:28:57,598 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 721 selfloop transitions, 94 changer transitions 266/1082 dead transitions. [2024-02-19 14:28:57,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 1082 transitions, 154083 flow [2024-02-19 14:28:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:28:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:28:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 189 transitions. [2024-02-19 14:28:57,599 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37351778656126483 [2024-02-19 14:28:57,600 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 840 predicate places. [2024-02-19 14:28:57,600 INFO L507 AbstractCegarLoop]: Abstraction has has 863 places, 1082 transitions, 154083 flow [2024-02-19 14:28:57,600 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:57,600 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:28:57,600 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:28:57,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-02-19 14:28:57,804 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-02-19 14:28:57,804 INFO L432 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:28:57,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:28:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 216065240, now seen corresponding path program 62 times [2024-02-19 14:28:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:28:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821315069] [2024-02-19 14:28:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:28:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:28:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:28:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:28:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821315069] [2024-02-19 14:28:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821315069] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:28:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837684417] [2024-02-19 14:28:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:28:58,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:28:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:28:58,315 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:28:58,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-02-19 14:28:58,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:28:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:28:58,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-19 14:28:58,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:28:58,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:28:58,741 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 27 treesize of output 19 [2024-02-19 14:28:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:28:58,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:28:59,235 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:28:59,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:28:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:28:59,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837684417] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:28:59,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:28:59,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-02-19 14:28:59,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774202271] [2024-02-19 14:28:59,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:28:59,329 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:28:59,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:28:59,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:28:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:28:59,330 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:28:59,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 1082 transitions, 154083 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:28:59,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:28:59,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:28:59,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:02,483 INFO L124 PetriNetUnfolderBase]: 1318/2550 cut-off events. [2024-02-19 14:29:02,484 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-02-19 14:29:02,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182855 conditions, 2550 events. 1318/2550 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16746 event pairs, 8 based on Foata normal form. 2/1954 useless extension candidates. Maximal degree in co-relation 130986. Up to 2530 conditions per place. [2024-02-19 14:29:02,572 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 728 selfloop transitions, 102 changer transitions 282/1113 dead transitions. [2024-02-19 14:29:02,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 1113 transitions, 160727 flow [2024-02-19 14:29:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-19 14:29:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-19 14:29:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 202 transitions. [2024-02-19 14:29:02,573 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35130434782608694 [2024-02-19 14:29:02,573 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 864 predicate places. [2024-02-19 14:29:02,573 INFO L507 AbstractCegarLoop]: Abstraction has has 887 places, 1113 transitions, 160727 flow [2024-02-19 14:29:02,574 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:02,574 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:02,574 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:02,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:02,786 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:02,786 INFO L432 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 698805378, now seen corresponding path program 63 times [2024-02-19 14:29:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732479288] [2024-02-19 14:29:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732479288] [2024-02-19 14:29:03,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732479288] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726784017] [2024-02-19 14:29:03,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:29:03,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:03,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:03,439 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:03,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-02-19 14:29:03,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:29:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:03,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:29:03,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:03,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:03,850 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 27 treesize of output 19 [2024-02-19 14:29:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:03,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:04,105 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:29:04,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:29:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726784017] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:04,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:04,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-02-19 14:29:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222568274] [2024-02-19 14:29:04,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:04,192 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:29:04,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:29:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:29:04,193 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:04,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 1113 transitions, 160727 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:04,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:04,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:04,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:07,803 INFO L124 PetriNetUnfolderBase]: 1390/2694 cut-off events. [2024-02-19 14:29:07,803 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-02-19 14:29:07,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195849 conditions, 2694 events. 1390/2694 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17924 event pairs, 2 based on Foata normal form. 2/2054 useless extension candidates. Maximal degree in co-relation 139375. Up to 2673 conditions per place. [2024-02-19 14:29:07,896 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 813 selfloop transitions, 55 changer transitions 294/1163 dead transitions. [2024-02-19 14:29:07,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 1163 transitions, 170287 flow [2024-02-19 14:29:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 14:29:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 14:29:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 162 transitions. [2024-02-19 14:29:07,897 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3707093821510298 [2024-02-19 14:29:07,897 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 882 predicate places. [2024-02-19 14:29:07,898 INFO L507 AbstractCegarLoop]: Abstraction has has 905 places, 1163 transitions, 170287 flow [2024-02-19 14:29:07,898 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:07,898 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:07,898 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:07,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-02-19 14:29:08,110 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:08,110 INFO L432 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:08,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash 395072186, now seen corresponding path program 64 times [2024-02-19 14:29:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303272694] [2024-02-19 14:29:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:08,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:29:08,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:08,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303272694] [2024-02-19 14:29:08,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303272694] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:08,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138896596] [2024-02-19 14:29:08,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:29:08,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:08,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:08,778 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:08,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-02-19 14:29:09,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:29:09,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:09,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:29:09,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:09,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:09,286 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 35 treesize of output 23 [2024-02-19 14:29:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:09,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:09,602 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:29:09,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-02-19 14:29:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:09,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138896596] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:09,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:09,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-02-19 14:29:09,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686414533] [2024-02-19 14:29:09,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:09,679 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-19 14:29:09,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-19 14:29:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-02-19 14:29:09,680 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:09,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 905 places, 1163 transitions, 170287 flow. Second operand has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 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) [2024-02-19 14:29:09,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:09,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:09,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:13,518 INFO L124 PetriNetUnfolderBase]: 1407/2726 cut-off events. [2024-02-19 14:29:13,519 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-02-19 14:29:13,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200899 conditions, 2726 events. 1407/2726 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18249 event pairs, 4 based on Foata normal form. 1/2075 useless extension candidates. Maximal degree in co-relation 142986. Up to 2705 conditions per place. [2024-02-19 14:29:13,592 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 783 selfloop transitions, 97 changer transitions 295/1176 dead transitions. [2024-02-19 14:29:13,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 923 places, 1176 transitions, 174541 flow [2024-02-19 14:29:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 14:29:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 14:29:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 132 transitions. [2024-02-19 14:29:13,594 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30205949656750575 [2024-02-19 14:29:13,594 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 900 predicate places. [2024-02-19 14:29:13,594 INFO L507 AbstractCegarLoop]: Abstraction has has 923 places, 1176 transitions, 174541 flow [2024-02-19 14:29:13,594 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 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) [2024-02-19 14:29:13,594 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:13,594 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:13,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:13,806 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-02-19 14:29:13,806 INFO L432 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:13,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1280870466, now seen corresponding path program 65 times [2024-02-19 14:29:13,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:13,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194739776] [2024-02-19 14:29:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:29:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:14,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194739776] [2024-02-19 14:29:14,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194739776] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:14,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109152219] [2024-02-19 14:29:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:29:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:14,484 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:14,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-02-19 14:29:14,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:29:14,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:14,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:29:14,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:14,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:14,966 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 31 treesize of output 23 [2024-02-19 14:29:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:14,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:15,295 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:29:15,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-02-19 14:29:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:15,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109152219] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:15,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:15,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-02-19 14:29:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032820427] [2024-02-19 14:29:15,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:15,414 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-19 14:29:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-19 14:29:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-02-19 14:29:15,414 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:15,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 1176 transitions, 174541 flow. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:15,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:15,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:15,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:19,530 INFO L124 PetriNetUnfolderBase]: 1464/2837 cut-off events. [2024-02-19 14:29:19,530 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2024-02-19 14:29:19,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211872 conditions, 2837 events. 1464/2837 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19133 event pairs, 6 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 150843. Up to 2815 conditions per place. [2024-02-19 14:29:19,708 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 839 selfloop transitions, 75 changer transitions 302/1217 dead transitions. [2024-02-19 14:29:19,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 947 places, 1217 transitions, 183065 flow [2024-02-19 14:29:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-19 14:29:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-19 14:29:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 180 transitions. [2024-02-19 14:29:19,718 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3130434782608696 [2024-02-19 14:29:19,718 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 924 predicate places. [2024-02-19 14:29:19,718 INFO L507 AbstractCegarLoop]: Abstraction has has 947 places, 1217 transitions, 183065 flow [2024-02-19 14:29:19,719 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:19,719 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:19,719 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:19,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:19,931 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:19,932 INFO L432 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1711229490, now seen corresponding path program 66 times [2024-02-19 14:29:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103149668] [2024-02-19 14:29:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103149668] [2024-02-19 14:29:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103149668] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86840806] [2024-02-19 14:29:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:29:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:20,452 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:20,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-02-19 14:29:20,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:29:20,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:20,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:29:20,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:20,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:20,923 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 27 treesize of output 19 [2024-02-19 14:29:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:20,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:21,217 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:29:21,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-02-19 14:29:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:21,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86840806] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:21,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:21,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 25 [2024-02-19 14:29:21,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529959942] [2024-02-19 14:29:21,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:21,290 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-19 14:29:21,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:21,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-19 14:29:21,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-02-19 14:29:21,291 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:21,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 947 places, 1217 transitions, 183065 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:21,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:21,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:21,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:24,935 INFO L124 PetriNetUnfolderBase]: 1466/2846 cut-off events. [2024-02-19 14:29:24,935 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-02-19 14:29:24,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215379 conditions, 2846 events. 1466/2846 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19262 event pairs, 2 based on Foata normal form. 1/2159 useless extension candidates. Maximal degree in co-relation 153310. Up to 2824 conditions per place. [2024-02-19 14:29:25,018 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 832 selfloop transitions, 84 changer transitions 307/1224 dead transitions. [2024-02-19 14:29:25,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 1224 transitions, 186567 flow [2024-02-19 14:29:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:29:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:29:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 108 transitions. [2024-02-19 14:29:25,019 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2024-02-19 14:29:25,019 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 937 predicate places. [2024-02-19 14:29:25,020 INFO L507 AbstractCegarLoop]: Abstraction has has 960 places, 1224 transitions, 186567 flow [2024-02-19 14:29:25,020 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:25,020 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:25,020 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:25,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:25,232 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:25,232 INFO L432 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:25,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:25,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1729448838, now seen corresponding path program 67 times [2024-02-19 14:29:25,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:25,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302528982] [2024-02-19 14:29:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:25,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:25,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:25,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302528982] [2024-02-19 14:29:25,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302528982] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:25,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947276174] [2024-02-19 14:29:25,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:29:25,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:25,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:25,787 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:25,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-02-19 14:29:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:26,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:29:26,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:26,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:26,224 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 35 treesize of output 23 [2024-02-19 14:29:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:26,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:26,556 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:29:26,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:29:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947276174] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:26,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:26,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-02-19 14:29:26,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539520037] [2024-02-19 14:29:26,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:26,640 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-19 14:29:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-19 14:29:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-02-19 14:29:26,641 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:26,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 1224 transitions, 186567 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:26,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:26,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:26,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:31,181 INFO L124 PetriNetUnfolderBase]: 1530/2966 cut-off events. [2024-02-19 14:29:31,181 INFO L125 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2024-02-19 14:29:31,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227309 conditions, 2966 events. 1530/2966 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20209 event pairs, 0 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 161487. Up to 2942 conditions per place. [2024-02-19 14:29:31,266 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 896 selfloop transitions, 56 changer transitions 312/1265 dead transitions. [2024-02-19 14:29:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 980 places, 1265 transitions, 195354 flow [2024-02-19 14:29:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-19 14:29:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-19 14:29:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 172 transitions. [2024-02-19 14:29:31,267 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35610766045548653 [2024-02-19 14:29:31,268 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 957 predicate places. [2024-02-19 14:29:31,268 INFO L507 AbstractCegarLoop]: Abstraction has has 980 places, 1265 transitions, 195354 flow [2024-02-19 14:29:31,268 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:31,268 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:31,268 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:31,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-02-19 14:29:31,472 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:31,472 INFO L432 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:31,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash -438674106, now seen corresponding path program 68 times [2024-02-19 14:29:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:31,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265603852] [2024-02-19 14:29:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:31,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:31,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:31,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265603852] [2024-02-19 14:29:31,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265603852] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:31,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045150223] [2024-02-19 14:29:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:29:31,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:31,955 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:31,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-02-19 14:29:32,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:29:32,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:32,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-19 14:29:32,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:32,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:32,428 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 27 treesize of output 19 [2024-02-19 14:29:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:29:32,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:32,884 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:29:32,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:29:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:32,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045150223] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:32,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:32,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-02-19 14:29:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122896795] [2024-02-19 14:29:32,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:32,966 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:29:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:29:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:29:32,967 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:32,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 1265 transitions, 195354 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:32,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:32,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:32,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:37,946 INFO L124 PetriNetUnfolderBase]: 1588/3082 cut-off events. [2024-02-19 14:29:37,946 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2024-02-19 14:29:37,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239242 conditions, 3082 events. 1588/3082 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21202 event pairs, 8 based on Foata normal form. 3/2325 useless extension candidates. Maximal degree in co-relation 169044. Up to 3057 conditions per place. [2024-02-19 14:29:38,049 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 931 selfloop transitions, 65 changer transitions 316/1313 dead transitions. [2024-02-19 14:29:38,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 1313 transitions, 205400 flow [2024-02-19 14:29:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:29:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:29:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 176 transitions. [2024-02-19 14:29:38,050 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-19 14:29:38,050 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 978 predicate places. [2024-02-19 14:29:38,050 INFO L507 AbstractCegarLoop]: Abstraction has has 1001 places, 1313 transitions, 205400 flow [2024-02-19 14:29:38,050 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:38,050 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:38,051 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:38,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:38,262 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-02-19 14:29:38,263 INFO L432 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:38,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash -186992902, now seen corresponding path program 69 times [2024-02-19 14:29:38,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:38,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044626602] [2024-02-19 14:29:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:38,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:29:39,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044626602] [2024-02-19 14:29:39,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044626602] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455060403] [2024-02-19 14:29:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:29:39,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:39,002 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:39,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-02-19 14:29:39,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:29:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:39,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 38 conjunts are in the unsatisfiable core [2024-02-19 14:29:39,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:39,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:39,459 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 27 treesize of output 19 [2024-02-19 14:29:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:39,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:39,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:39,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2024-02-19 14:29:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:39,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455060403] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:39,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:39,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 30 [2024-02-19 14:29:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958101040] [2024-02-19 14:29:39,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:39,929 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:29:39,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:29:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:29:39,930 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:39,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 1313 transitions, 205400 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:39,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:39,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:39,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:45,094 INFO L124 PetriNetUnfolderBase]: 1624/3190 cut-off events. [2024-02-19 14:29:45,094 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2024-02-19 14:29:45,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250702 conditions, 3190 events. 1624/3190 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22356 event pairs, 8 based on Foata normal form. 4/2414 useless extension candidates. Maximal degree in co-relation 175398. Up to 3163 conditions per place. [2024-02-19 14:29:45,192 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 890 selfloop transitions, 136 changer transitions 345/1372 dead transitions. [2024-02-19 14:29:45,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1027 places, 1372 transitions, 217400 flow [2024-02-19 14:29:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-19 14:29:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-19 14:29:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 236 transitions. [2024-02-19 14:29:45,194 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38003220611916266 [2024-02-19 14:29:45,194 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1004 predicate places. [2024-02-19 14:29:45,194 INFO L507 AbstractCegarLoop]: Abstraction has has 1027 places, 1372 transitions, 217400 flow [2024-02-19 14:29:45,194 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:45,194 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:45,194 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:45,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:45,406 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:45,406 INFO L432 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:45,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 981501638, now seen corresponding path program 70 times [2024-02-19 14:29:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543163672] [2024-02-19 14:29:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:29:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543163672] [2024-02-19 14:29:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543163672] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269552005] [2024-02-19 14:29:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:29:46,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:46,225 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:46,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-02-19 14:29:46,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:29:46,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:46,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:29:46,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:46,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:46,682 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 35 treesize of output 23 [2024-02-19 14:29:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:46,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:47,047 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-19 14:29:47,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-02-19 14:29:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:47,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269552005] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:47,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:47,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-02-19 14:29:47,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434111482] [2024-02-19 14:29:47,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:47,146 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 14:29:47,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 14:29:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 14:29:47,147 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:47,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 1372 transitions, 217400 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:47,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:47,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:47,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:29:52,634 INFO L124 PetriNetUnfolderBase]: 1628/3208 cut-off events. [2024-02-19 14:29:52,634 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-02-19 14:29:52,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255315 conditions, 3208 events. 1628/3208 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22562 event pairs, 4 based on Foata normal form. 2/2426 useless extension candidates. Maximal degree in co-relation 178578. Up to 3181 conditions per place. [2024-02-19 14:29:52,746 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 958 selfloop transitions, 74 changer transitions 356/1389 dead transitions. [2024-02-19 14:29:52,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1050 places, 1389 transitions, 222874 flow [2024-02-19 14:29:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-19 14:29:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-19 14:29:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 181 transitions. [2024-02-19 14:29:52,747 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3278985507246377 [2024-02-19 14:29:52,747 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1027 predicate places. [2024-02-19 14:29:52,747 INFO L507 AbstractCegarLoop]: Abstraction has has 1050 places, 1389 transitions, 222874 flow [2024-02-19 14:29:52,747 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:52,748 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:29:52,748 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:29:52,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-02-19 14:29:52,959 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:52,960 INFO L432 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:29:52,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:29:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1205151644, now seen corresponding path program 71 times [2024-02-19 14:29:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:29:52,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916274129] [2024-02-19 14:29:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:29:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:29:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:29:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:53,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:29:53,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916274129] [2024-02-19 14:29:53,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916274129] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:29:53,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877115851] [2024-02-19 14:29:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:29:53,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:29:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:29:53,552 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:29:53,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-02-19 14:29:53,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:29:53,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:29:53,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-19 14:29:53,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:29:54,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:54,058 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 31 treesize of output 23 [2024-02-19 14:29:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:54,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:29:54,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:29:54,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 117 [2024-02-19 14:29:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:29:54,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877115851] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:29:54,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:29:54,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 27 [2024-02-19 14:29:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058199049] [2024-02-19 14:29:54,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:29:54,474 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:29:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:29:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:29:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:29:54,475 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:29:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1050 places, 1389 transitions, 222874 flow. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:29:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:29:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:29:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:00,214 INFO L124 PetriNetUnfolderBase]: 1694/3339 cut-off events. [2024-02-19 14:30:00,215 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-02-19 14:30:00,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268887 conditions, 3339 events. 1694/3339 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23587 event pairs, 16 based on Foata normal form. 2/2515 useless extension candidates. Maximal degree in co-relation 187776. Up to 3309 conditions per place. [2024-02-19 14:30:00,330 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1030 selfloop transitions, 54 changer transitions 368/1453 dead transitions. [2024-02-19 14:30:00,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1069 places, 1453 transitions, 236063 flow [2024-02-19 14:30:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:30:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:30:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 180 transitions. [2024-02-19 14:30:00,331 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2024-02-19 14:30:00,332 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1046 predicate places. [2024-02-19 14:30:00,332 INFO L507 AbstractCegarLoop]: Abstraction has has 1069 places, 1453 transitions, 236063 flow [2024-02-19 14:30:00,332 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:00,332 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:00,332 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:00,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-02-19 14:30:00,544 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-02-19 14:30:00,544 INFO L432 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:00,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash 667296066, now seen corresponding path program 72 times [2024-02-19 14:30:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047111908] [2024-02-19 14:30:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:30:01,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:01,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047111908] [2024-02-19 14:30:01,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047111908] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:01,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189249733] [2024-02-19 14:30:01,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:30:01,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:01,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:01,319 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:01,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-02-19 14:30:01,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:30:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:30:01,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:30:01,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:01,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:30:01,737 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 27 treesize of output 19 [2024-02-19 14:30:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:01,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:02,028 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:30:02,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:30:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:02,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189249733] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:02,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:02,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 29 [2024-02-19 14:30:02,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591285534] [2024-02-19 14:30:02,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:02,098 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:30:02,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:02,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:30:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:30:02,098 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:02,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 1453 transitions, 236063 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:02,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:02,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:02,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:08,238 INFO L124 PetriNetUnfolderBase]: 1705/3375 cut-off events. [2024-02-19 14:30:08,238 INFO L125 PetriNetUnfolderBase]: For 543/543 co-relation queries the response was YES. [2024-02-19 14:30:08,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275081 conditions, 3375 events. 1705/3375 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24017 event pairs, 10 based on Foata normal form. 2/2543 useless extension candidates. Maximal degree in co-relation 191160. Up to 3344 conditions per place. [2024-02-19 14:30:08,364 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1024 selfloop transitions, 75 changer transitions 379/1479 dead transitions. [2024-02-19 14:30:08,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1092 places, 1479 transitions, 243255 flow [2024-02-19 14:30:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-19 14:30:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-19 14:30:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 187 transitions. [2024-02-19 14:30:08,366 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.338768115942029 [2024-02-19 14:30:08,366 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1069 predicate places. [2024-02-19 14:30:08,366 INFO L507 AbstractCegarLoop]: Abstraction has has 1092 places, 1479 transitions, 243255 flow [2024-02-19 14:30:08,366 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:08,366 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:08,366 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:08,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2024-02-19 14:30:08,578 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:08,579 INFO L432 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:08,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1709997126, now seen corresponding path program 73 times [2024-02-19 14:30:08,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:08,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475739284] [2024-02-19 14:30:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:30:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:09,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475739284] [2024-02-19 14:30:09,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475739284] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902053170] [2024-02-19 14:30:09,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:30:09,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:09,602 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:09,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-02-19 14:30:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:09,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:30:09,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:10,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:30:10,041 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 35 treesize of output 23 [2024-02-19 14:30:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:10,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:10,377 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:30:10,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:30:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902053170] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:10,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 36 [2024-02-19 14:30:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816284893] [2024-02-19 14:30:10,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:10,434 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-19 14:30:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-19 14:30:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2024-02-19 14:30:10,435 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:10,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1092 places, 1479 transitions, 243255 flow. Second operand has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 36 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:10,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:10,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:10,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:16,719 INFO L124 PetriNetUnfolderBase]: 1707/3384 cut-off events. [2024-02-19 14:30:16,720 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-02-19 14:30:16,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279180 conditions, 3384 events. 1707/3384 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24178 event pairs, 12 based on Foata normal form. 1/2549 useless extension candidates. Maximal degree in co-relation 193989. Up to 3353 conditions per place. [2024-02-19 14:30:16,851 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1000 selfloop transitions, 100 changer transitions 384/1485 dead transitions. [2024-02-19 14:30:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1109 places, 1485 transitions, 247213 flow [2024-02-19 14:30:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-19 14:30:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-19 14:30:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 126 transitions. [2024-02-19 14:30:16,852 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-02-19 14:30:16,853 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1086 predicate places. [2024-02-19 14:30:16,853 INFO L507 AbstractCegarLoop]: Abstraction has has 1109 places, 1485 transitions, 247213 flow [2024-02-19 14:30:16,853 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 36 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:16,853 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:16,853 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:16,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-02-19 14:30:17,065 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:17,065 INFO L432 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:17,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1013010950, now seen corresponding path program 74 times [2024-02-19 14:30:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:17,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686975442] [2024-02-19 14:30:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:30:18,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686975442] [2024-02-19 14:30:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686975442] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934184328] [2024-02-19 14:30:18,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:30:18,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:18,101 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:18,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-02-19 14:30:18,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:30:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:30:18,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-19 14:30:18,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:18,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:30:18,575 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 27 treesize of output 19 [2024-02-19 14:30:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:30:18,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:18,955 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-19 14:30:18,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-02-19 14:30:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934184328] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:19,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:19,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 37 [2024-02-19 14:30:19,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58691919] [2024-02-19 14:30:19,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:19,052 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-19 14:30:19,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:19,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-19 14:30:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2024-02-19 14:30:19,053 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:19,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1109 places, 1485 transitions, 247213 flow. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:19,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:19,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:25,946 INFO L124 PetriNetUnfolderBase]: 1711/3402 cut-off events. [2024-02-19 14:30:25,947 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2024-02-19 14:30:25,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284055 conditions, 3402 events. 1711/3402 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24394 event pairs, 14 based on Foata normal form. 2/2564 useless extension candidates. Maximal degree in co-relation 197334. Up to 3371 conditions per place. [2024-02-19 14:30:26,079 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1027 selfloop transitions, 76 changer transitions 394/1498 dead transitions. [2024-02-19 14:30:26,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1134 places, 1498 transitions, 252377 flow [2024-02-19 14:30:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 14:30:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 14:30:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 184 transitions. [2024-02-19 14:30:26,081 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-02-19 14:30:26,082 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1111 predicate places. [2024-02-19 14:30:26,082 INFO L507 AbstractCegarLoop]: Abstraction has has 1134 places, 1498 transitions, 252377 flow [2024-02-19 14:30:26,082 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:26,082 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:26,082 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:26,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-02-19 14:30:26,294 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:26,294 INFO L432 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:26,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222687, now seen corresponding path program 75 times [2024-02-19 14:30:26,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:26,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692463178] [2024-02-19 14:30:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:26,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:30:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692463178] [2024-02-19 14:30:27,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692463178] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464433448] [2024-02-19 14:30:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:30:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:27,545 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:27,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-02-19 14:30:27,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:30:27,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:30:27,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:30:27,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:28,068 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-19 14:30:28,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:30:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:28,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:28,209 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:30:28,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-02-19 14:30:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464433448] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:28,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:28,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 33 [2024-02-19 14:30:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505933474] [2024-02-19 14:30:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:28,245 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 14:30:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 14:30:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 14:30:28,246 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:28,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1134 places, 1498 transitions, 252377 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:28,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:28,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:28,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:35,264 INFO L124 PetriNetUnfolderBase]: 1751/3477 cut-off events. [2024-02-19 14:30:35,264 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2024-02-19 14:30:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293812 conditions, 3477 events. 1751/3477 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24946 event pairs, 10 based on Foata normal form. 0/2627 useless extension candidates. Maximal degree in co-relation 203933. Up to 3446 conditions per place. [2024-02-19 14:30:35,407 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 976 selfloop transitions, 162 changer transitions 394/1533 dead transitions. [2024-02-19 14:30:35,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1159 places, 1533 transitions, 261336 flow [2024-02-19 14:30:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 14:30:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 14:30:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 183 transitions. [2024-02-19 14:30:35,416 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3060200668896321 [2024-02-19 14:30:35,416 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1136 predicate places. [2024-02-19 14:30:35,416 INFO L507 AbstractCegarLoop]: Abstraction has has 1159 places, 1533 transitions, 261336 flow [2024-02-19 14:30:35,416 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:35,416 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:35,416 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:35,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-02-19 14:30:35,628 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2024-02-19 14:30:35,629 INFO L432 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:35,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash 575765546, now seen corresponding path program 76 times [2024-02-19 14:30:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:35,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065592237] [2024-02-19 14:30:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:36,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065592237] [2024-02-19 14:30:36,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065592237] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781141297] [2024-02-19 14:30:36,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:30:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:36,082 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:36,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-02-19 14:30:36,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:30:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:30:36,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:30:36,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:36,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:36,631 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-19 14:30:36,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-02-19 14:30:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781141297] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:36,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:36,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-02-19 14:30:36,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233197618] [2024-02-19 14:30:36,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:36,647 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:30:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:30:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:30:36,648 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:36,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1159 places, 1533 transitions, 261336 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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) [2024-02-19 14:30:36,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:36,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:36,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:43,758 INFO L124 PetriNetUnfolderBase]: 1759/3502 cut-off events. [2024-02-19 14:30:43,758 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2024-02-19 14:30:43,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299419 conditions, 3502 events. 1759/3502 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25228 event pairs, 12 based on Foata normal form. 0/2652 useless extension candidates. Maximal degree in co-relation 207192. Up to 3471 conditions per place. [2024-02-19 14:30:43,899 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1020 selfloop transitions, 171 changer transitions 432/1624 dead transitions. [2024-02-19 14:30:43,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1169 places, 1624 transitions, 280070 flow [2024-02-19 14:30:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:30:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:30:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-02-19 14:30:43,900 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4150197628458498 [2024-02-19 14:30:43,901 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1146 predicate places. [2024-02-19 14:30:43,901 INFO L507 AbstractCegarLoop]: Abstraction has has 1169 places, 1624 transitions, 280070 flow [2024-02-19 14:30:43,901 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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) [2024-02-19 14:30:43,901 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:43,901 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:43,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-02-19 14:30:44,113 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:44,113 INFO L432 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:44,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 469485535, now seen corresponding path program 77 times [2024-02-19 14:30:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:44,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341325960] [2024-02-19 14:30:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:30:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341325960] [2024-02-19 14:30:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341325960] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978388239] [2024-02-19 14:30:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:30:45,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:45,027 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:45,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-02-19 14:30:45,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:30:45,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:30:45,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:30:45,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:45,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:45,778 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:30:45,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-02-19 14:30:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:45,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978388239] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:45,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:45,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 30 [2024-02-19 14:30:45,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810359510] [2024-02-19 14:30:45,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:45,809 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:30:45,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:30:45,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:30:45,810 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:45,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1169 places, 1624 transitions, 280070 flow. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:45,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:30:53,058 INFO L124 PetriNetUnfolderBase]: 1778/3537 cut-off events. [2024-02-19 14:30:53,058 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-02-19 14:30:53,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305944 conditions, 3537 events. 1778/3537 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25477 event pairs, 8 based on Foata normal form. 0/2683 useless extension candidates. Maximal degree in co-relation 211602. Up to 3506 conditions per place. [2024-02-19 14:30:53,193 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1030 selfloop transitions, 173 changer transitions 436/1640 dead transitions. [2024-02-19 14:30:53,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1196 places, 1640 transitions, 286109 flow [2024-02-19 14:30:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 14:30:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 14:30:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 220 transitions. [2024-02-19 14:30:53,194 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3416149068322981 [2024-02-19 14:30:53,194 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1173 predicate places. [2024-02-19 14:30:53,195 INFO L507 AbstractCegarLoop]: Abstraction has has 1196 places, 1640 transitions, 286109 flow [2024-02-19 14:30:53,195 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:53,195 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:30:53,195 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:30:53,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-02-19 14:30:53,407 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:53,407 INFO L432 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:30:53,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:30:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1702176350, now seen corresponding path program 78 times [2024-02-19 14:30:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:30:53,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285052327] [2024-02-19 14:30:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:30:53,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:30:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:30:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:53,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:30:53,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285052327] [2024-02-19 14:30:53,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285052327] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:30:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410979386] [2024-02-19 14:30:53,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:30:53,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:30:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:30:53,877 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:30:53,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-02-19 14:30:54,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:30:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:30:54,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:30:54,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:30:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:54,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:30:54,776 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-19 14:30:54,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-02-19 14:30:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:30:54,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410979386] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:30:54,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:30:54,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-02-19 14:30:54,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553881167] [2024-02-19 14:30:54,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:30:54,810 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:30:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:30:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:30:54,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:30:54,811 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:30:54,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1196 places, 1640 transitions, 286109 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:30:54,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:30:54,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:30:54,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:31:02,342 INFO L124 PetriNetUnfolderBase]: 1783/3555 cut-off events. [2024-02-19 14:31:02,342 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-02-19 14:31:02,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311044 conditions, 3555 events. 1783/3555 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25738 event pairs, 12 based on Foata normal form. 0/2701 useless extension candidates. Maximal degree in co-relation 214650. Up to 3524 conditions per place. [2024-02-19 14:31:02,462 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1064 selfloop transitions, 134 changer transitions 453/1652 dead transitions. [2024-02-19 14:31:02,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1206 places, 1652 transitions, 291511 flow [2024-02-19 14:31:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:31:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:31:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-02-19 14:31:02,464 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4150197628458498 [2024-02-19 14:31:02,464 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1183 predicate places. [2024-02-19 14:31:02,464 INFO L507 AbstractCegarLoop]: Abstraction has has 1206 places, 1652 transitions, 291511 flow [2024-02-19 14:31:02,464 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:02,464 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:31:02,464 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:31:02,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-02-19 14:31:02,676 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-02-19 14:31:02,676 INFO L432 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:31:02,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:31:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash -657910558, now seen corresponding path program 79 times [2024-02-19 14:31:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:31:02,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491637107] [2024-02-19 14:31:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:31:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:31:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:03,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:31:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491637107] [2024-02-19 14:31:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491637107] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:31:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004530923] [2024-02-19 14:31:03,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:31:03,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:31:03,445 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:31:03,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-02-19 14:31:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:03,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:31:03,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:31:03,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:31:03,947 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 81 treesize of output 45 [2024-02-19 14:31:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:03,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:31:04,106 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-19 14:31:04,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-02-19 14:31:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:04,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004530923] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:31:04,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:31:04,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-02-19 14:31:04,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417686719] [2024-02-19 14:31:04,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:31:04,123 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:31:04,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:31:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:31:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:31:04,124 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:31:04,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1206 places, 1652 transitions, 291511 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 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) [2024-02-19 14:31:04,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:31:04,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:31:04,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:31:12,662 INFO L124 PetriNetUnfolderBase]: 1803/3610 cut-off events. [2024-02-19 14:31:12,662 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2024-02-19 14:31:12,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319302 conditions, 3610 events. 1803/3610 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26356 event pairs, 16 based on Foata normal form. 0/2746 useless extension candidates. Maximal degree in co-relation 219581. Up to 3577 conditions per place. [2024-02-19 14:31:12,844 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1075 selfloop transitions, 140 changer transitions 462/1678 dead transitions. [2024-02-19 14:31:12,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 1678 transitions, 299462 flow [2024-02-19 14:31:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:31:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:31:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-02-19 14:31:12,845 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44481605351170567 [2024-02-19 14:31:12,845 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1195 predicate places. [2024-02-19 14:31:12,845 INFO L507 AbstractCegarLoop]: Abstraction has has 1218 places, 1678 transitions, 299462 flow [2024-02-19 14:31:12,845 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 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) [2024-02-19 14:31:12,845 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:31:12,846 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:31:12,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-02-19 14:31:13,058 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:13,058 INFO L432 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:31:13,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:31:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash -276088703, now seen corresponding path program 80 times [2024-02-19 14:31:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:31:13,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419779439] [2024-02-19 14:31:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:31:13,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:31:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:31:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:31:13,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419779439] [2024-02-19 14:31:13,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419779439] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:31:13,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379833637] [2024-02-19 14:31:13,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:31:13,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:31:13,807 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:31:13,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-02-19 14:31:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:31:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:31:14,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-19 14:31:14,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:31:14,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:31:14,322 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 65 treesize of output 41 [2024-02-19 14:31:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:31:14,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:31:14,468 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:31:14,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-02-19 14:31:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:14,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379833637] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:31:14,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:31:14,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-02-19 14:31:14,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968581542] [2024-02-19 14:31:14,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:31:14,495 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:31:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:31:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:31:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:31:14,496 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:31:14,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1218 places, 1678 transitions, 299462 flow. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 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) [2024-02-19 14:31:14,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:31:14,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:31:14,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:31:24,214 INFO L124 PetriNetUnfolderBase]: 1853/3708 cut-off events. [2024-02-19 14:31:24,214 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2024-02-19 14:31:24,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331536 conditions, 3708 events. 1853/3708 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27192 event pairs, 6 based on Foata normal form. 0/2824 useless extension candidates. Maximal degree in co-relation 227988. Up to 3673 conditions per place. [2024-02-19 14:31:24,332 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1075 selfloop transitions, 185 changer transitions 462/1723 dead transitions. [2024-02-19 14:31:24,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1723 transitions, 310943 flow [2024-02-19 14:31:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-19 14:31:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-19 14:31:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 258 transitions. [2024-02-19 14:31:24,337 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35054347826086957 [2024-02-19 14:31:24,337 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1226 predicate places. [2024-02-19 14:31:24,337 INFO L507 AbstractCegarLoop]: Abstraction has has 1249 places, 1723 transitions, 310943 flow [2024-02-19 14:31:24,338 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 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) [2024-02-19 14:31:24,338 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:31:24,338 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:31:24,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-02-19 14:31:24,549 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:24,550 INFO L432 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:31:24,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:31:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1060968700, now seen corresponding path program 81 times [2024-02-19 14:31:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:31:24,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84998139] [2024-02-19 14:31:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:31:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:31:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:31:25,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:31:25,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84998139] [2024-02-19 14:31:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84998139] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:31:25,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061500445] [2024-02-19 14:31:25,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:31:25,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:25,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:31:25,279 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:31:25,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-02-19 14:31:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-19 14:31:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:31:25,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:31:25,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:31:25,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:31:25,962 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 46 treesize of output 30 [2024-02-19 14:31:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:26,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:31:26,143 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-19 14:31:26,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-02-19 14:31:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061500445] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:31:26,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:31:26,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 26 [2024-02-19 14:31:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814352258] [2024-02-19 14:31:26,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:31:26,177 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:31:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:31:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:31:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:31:26,178 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:31:26,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1249 places, 1723 transitions, 310943 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:26,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:31:26,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:31:26,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:31:35,366 INFO L124 PetriNetUnfolderBase]: 1847/3691 cut-off events. [2024-02-19 14:31:35,366 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2024-02-19 14:31:35,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333755 conditions, 3691 events. 1847/3691 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27007 event pairs, 8 based on Foata normal form. 0/2811 useless extension candidates. Maximal degree in co-relation 229793. Up to 3657 conditions per place. [2024-02-19 14:31:35,488 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1094 selfloop transitions, 159 changer transitions 462/1716 dead transitions. [2024-02-19 14:31:35,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1263 places, 1716 transitions, 313107 flow [2024-02-19 14:31:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:31:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:31:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 139 transitions. [2024-02-19 14:31:35,489 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37771739130434784 [2024-02-19 14:31:35,490 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1240 predicate places. [2024-02-19 14:31:35,490 INFO L507 AbstractCegarLoop]: Abstraction has has 1263 places, 1716 transitions, 313107 flow [2024-02-19 14:31:35,490 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:35,490 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:31:35,490 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:31:35,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-02-19 14:31:35,703 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-02-19 14:31:35,703 INFO L432 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:31:35,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:31:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1426794207, now seen corresponding path program 82 times [2024-02-19 14:31:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:31:35,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688777871] [2024-02-19 14:31:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:31:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:31:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:31:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:31:36,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688777871] [2024-02-19 14:31:36,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688777871] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:31:36,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015151099] [2024-02-19 14:31:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:31:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:31:36,999 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:31:37,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-02-19 14:31:37,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:31:37,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:31:37,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:31:37,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:31:37,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:31:37,495 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 58 treesize of output 34 [2024-02-19 14:31:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:37,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:31:37,724 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:31:37,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-02-19 14:31:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015151099] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:31:37,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:31:37,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-19 14:31:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453231848] [2024-02-19 14:31:37,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:31:37,734 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 14:31:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:31:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 14:31:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 14:31:37,735 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:31:37,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1263 places, 1716 transitions, 313107 flow. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:37,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:31:37,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:31:37,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:31:46,191 INFO L124 PetriNetUnfolderBase]: 1841/3676 cut-off events. [2024-02-19 14:31:46,192 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2024-02-19 14:31:46,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336127 conditions, 3676 events. 1841/3676 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26860 event pairs, 10 based on Foata normal form. 0/2802 useless extension candidates. Maximal degree in co-relation 231398. Up to 3643 conditions per place. [2024-02-19 14:31:46,607 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1062 selfloop transitions, 180 changer transitions 464/1707 dead transitions. [2024-02-19 14:31:46,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1292 places, 1707 transitions, 314875 flow [2024-02-19 14:31:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-19 14:31:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-19 14:31:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 230 transitions. [2024-02-19 14:31:46,609 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-02-19 14:31:46,609 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1269 predicate places. [2024-02-19 14:31:46,609 INFO L507 AbstractCegarLoop]: Abstraction has has 1292 places, 1707 transitions, 314875 flow [2024-02-19 14:31:46,609 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:46,609 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:31:46,609 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:31:46,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-02-19 14:31:46,816 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:46,816 INFO L432 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:31:46,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:31:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1577398357, now seen corresponding path program 83 times [2024-02-19 14:31:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:31:46,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001668198] [2024-02-19 14:31:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:31:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:31:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:31:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:31:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001668198] [2024-02-19 14:31:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001668198] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:31:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115544300] [2024-02-19 14:31:47,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:31:47,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:47,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:31:47,993 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:31:48,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-02-19 14:31:48,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:31:48,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:31:48,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:31:48,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:31:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:48,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:31:48,776 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-19 14:31:48,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-02-19 14:31:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115544300] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:31:48,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:31:48,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 38 [2024-02-19 14:31:48,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209576735] [2024-02-19 14:31:48,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:31:48,822 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-19 14:31:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:31:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-19 14:31:48,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2024-02-19 14:31:48,823 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:31:48,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1292 places, 1707 transitions, 314875 flow. Second operand has 38 states, 38 states have (on average 4.842105263157895) internal successors, (184), 38 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:48,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:31:48,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:31:48,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:31:57,487 INFO L124 PetriNetUnfolderBase]: 1891/3759 cut-off events. [2024-02-19 14:31:57,487 INFO L125 PetriNetUnfolderBase]: For 596/596 co-relation queries the response was YES. [2024-02-19 14:31:57,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347592 conditions, 3759 events. 1891/3759 cut-off events. For 596/596 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27471 event pairs, 8 based on Foata normal form. 0/2877 useless extension candidates. Maximal degree in co-relation 239679. Up to 3727 conditions per place. [2024-02-19 14:31:57,639 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1104 selfloop transitions, 173 changer transitions 464/1742 dead transitions. [2024-02-19 14:31:57,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1319 places, 1742 transitions, 324812 flow [2024-02-19 14:31:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-19 14:31:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-19 14:31:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 216 transitions. [2024-02-19 14:31:57,640 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3130434782608696 [2024-02-19 14:31:57,640 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1296 predicate places. [2024-02-19 14:31:57,641 INFO L507 AbstractCegarLoop]: Abstraction has has 1319 places, 1742 transitions, 324812 flow [2024-02-19 14:31:57,641 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.842105263157895) internal successors, (184), 38 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:57,641 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:31:57,641 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:31:57,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-02-19 14:31:57,853 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:57,854 INFO L432 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:31:57,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:31:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2128028424, now seen corresponding path program 84 times [2024-02-19 14:31:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:31:57,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845410680] [2024-02-19 14:31:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:31:57,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:31:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:31:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 14:31:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:31:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845410680] [2024-02-19 14:31:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845410680] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:31:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739671455] [2024-02-19 14:31:58,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:31:58,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:31:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:31:58,910 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:31:58,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-02-19 14:31:59,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:31:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:31:59,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:31:59,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:31:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:59,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:31:59,678 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-19 14:31:59,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-02-19 14:31:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:31:59,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739671455] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:31:59,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:31:59,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 31 [2024-02-19 14:31:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967336483] [2024-02-19 14:31:59,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:31:59,721 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:31:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:31:59,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:31:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:31:59,722 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:31:59,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1319 places, 1742 transitions, 324812 flow. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:31:59,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:31:59,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:31:59,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:32:09,562 INFO L124 PetriNetUnfolderBase]: 1881/3738 cut-off events. [2024-02-19 14:32:09,562 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2024-02-19 14:32:09,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349441 conditions, 3738 events. 1881/3738 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27258 event pairs, 6 based on Foata normal form. 0/2864 useless extension candidates. Maximal degree in co-relation 241504. Up to 3707 conditions per place. [2024-02-19 14:32:09,686 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1106 selfloop transitions, 155 changer transitions 472/1734 dead transitions. [2024-02-19 14:32:09,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1334 places, 1734 transitions, 326784 flow [2024-02-19 14:32:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:32:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:32:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2024-02-19 14:32:09,687 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-02-19 14:32:09,688 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1311 predicate places. [2024-02-19 14:32:09,688 INFO L507 AbstractCegarLoop]: Abstraction has has 1334 places, 1734 transitions, 326784 flow [2024-02-19 14:32:09,688 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:09,688 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:32:09,688 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:32:09,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-02-19 14:32:09,900 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:09,901 INFO L432 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:32:09,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:32:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 26586395, now seen corresponding path program 85 times [2024-02-19 14:32:09,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:32:09,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708683402] [2024-02-19 14:32:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:32:09,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:32:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:32:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:32:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708683402] [2024-02-19 14:32:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708683402] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:32:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621263643] [2024-02-19 14:32:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:32:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:32:10,349 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:32:10,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-02-19 14:32:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:32:10,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:32:10,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:32:10,875 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-19 14:32:10,875 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 33 treesize of output 9 [2024-02-19 14:32:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:10,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:32:11,015 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:32:11,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:32:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:11,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621263643] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:32:11,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:32:11,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-02-19 14:32:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131519103] [2024-02-19 14:32:11,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:32:11,054 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:32:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:32:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:32:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:32:11,055 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:32:11,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1334 places, 1734 transitions, 326784 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 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) [2024-02-19 14:32:11,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:32:11,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:32:11,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:32:20,884 INFO L124 PetriNetUnfolderBase]: 1897/3766 cut-off events. [2024-02-19 14:32:20,884 INFO L125 PetriNetUnfolderBase]: For 609/609 co-relation queries the response was YES. [2024-02-19 14:32:20,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355816 conditions, 3766 events. 1897/3766 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27524 event pairs, 6 based on Foata normal form. 0/2888 useless extension candidates. Maximal degree in co-relation 245973. Up to 3735 conditions per place. [2024-02-19 14:32:21,012 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1187 selfloop transitions, 86 changer transitions 472/1746 dead transitions. [2024-02-19 14:32:21,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1351 places, 1746 transitions, 332536 flow [2024-02-19 14:32:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-19 14:32:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-19 14:32:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2024-02-19 14:32:21,013 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40096618357487923 [2024-02-19 14:32:21,014 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1328 predicate places. [2024-02-19 14:32:21,014 INFO L507 AbstractCegarLoop]: Abstraction has has 1351 places, 1746 transitions, 332536 flow [2024-02-19 14:32:21,014 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 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) [2024-02-19 14:32:21,014 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:32:21,014 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:32:21,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2024-02-19 14:32:21,216 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-02-19 14:32:21,216 INFO L432 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:32:21,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:32:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash -479759871, now seen corresponding path program 86 times [2024-02-19 14:32:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:32:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537433578] [2024-02-19 14:32:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:32:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:32:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:32:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:32:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:32:22,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537433578] [2024-02-19 14:32:22,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537433578] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:32:22,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015539219] [2024-02-19 14:32:22,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:32:22,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:32:22,350 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:32:22,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-02-19 14:32:22,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:32:22,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:32:22,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-19 14:32:22,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:32:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:32:22,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:32:23,011 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:32:23,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:32:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015539219] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:32:23,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:32:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 33 [2024-02-19 14:32:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213398249] [2024-02-19 14:32:23,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:32:23,091 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 14:32:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:32:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 14:32:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 14:32:23,092 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:32:23,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1351 places, 1746 transitions, 332536 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:23,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:32:23,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:32:23,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:32:34,001 INFO L124 PetriNetUnfolderBase]: 1924/3813 cut-off events. [2024-02-19 14:32:34,002 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2024-02-19 14:32:34,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364168 conditions, 3813 events. 1924/3813 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27896 event pairs, 10 based on Foata normal form. 0/2929 useless extension candidates. Maximal degree in co-relation 251730. Up to 3783 conditions per place. [2024-02-19 14:32:34,142 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1156 selfloop transitions, 136 changer transitions 477/1770 dead transitions. [2024-02-19 14:32:34,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1382 places, 1770 transitions, 340649 flow [2024-02-19 14:32:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-19 14:32:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-19 14:32:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 255 transitions. [2024-02-19 14:32:34,144 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34646739130434784 [2024-02-19 14:32:34,144 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1359 predicate places. [2024-02-19 14:32:34,144 INFO L507 AbstractCegarLoop]: Abstraction has has 1382 places, 1770 transitions, 340649 flow [2024-02-19 14:32:34,144 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:34,144 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:32:34,144 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:32:34,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-02-19 14:32:34,357 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:34,358 INFO L432 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:32:34,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:32:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2145075490, now seen corresponding path program 87 times [2024-02-19 14:32:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:32:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097380379] [2024-02-19 14:32:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:32:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:32:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:32:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:34,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:32:34,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097380379] [2024-02-19 14:32:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097380379] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:32:34,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470780116] [2024-02-19 14:32:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:32:34,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:32:34,907 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:32:34,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-02-19 14:32:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:32:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:32:35,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:32:35,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:32:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:35,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:32:35,538 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:32:35,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:32:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470780116] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:32:35,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:32:35,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2024-02-19 14:32:35,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528365294] [2024-02-19 14:32:35,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:32:35,611 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-19 14:32:35,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:32:35,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-19 14:32:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-02-19 14:32:35,612 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:32:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1382 places, 1770 transitions, 340649 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:35,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:32:35,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:32:35,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:32:46,047 INFO L124 PetriNetUnfolderBase]: 1920/3809 cut-off events. [2024-02-19 14:32:46,047 INFO L125 PetriNetUnfolderBase]: For 619/619 co-relation queries the response was YES. [2024-02-19 14:32:46,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367569 conditions, 3809 events. 1920/3809 cut-off events. For 619/619 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27920 event pairs, 8 based on Foata normal form. 0/2929 useless extension candidates. Maximal degree in co-relation 254158. Up to 3779 conditions per place. [2024-02-19 14:32:46,186 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1204 selfloop transitions, 75 changer transitions 489/1769 dead transitions. [2024-02-19 14:32:46,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1392 places, 1769 transitions, 343993 flow [2024-02-19 14:32:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:32:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:32:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-02-19 14:32:46,187 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.383399209486166 [2024-02-19 14:32:46,187 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1369 predicate places. [2024-02-19 14:32:46,187 INFO L507 AbstractCegarLoop]: Abstraction has has 1392 places, 1769 transitions, 343993 flow [2024-02-19 14:32:46,188 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:46,188 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:32:46,188 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:32:46,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-02-19 14:32:46,400 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:46,401 INFO L432 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:32:46,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:32:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1178783018, now seen corresponding path program 88 times [2024-02-19 14:32:46,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:32:46,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189683193] [2024-02-19 14:32:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:32:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:32:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:32:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:32:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:32:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189683193] [2024-02-19 14:32:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189683193] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:32:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279539465] [2024-02-19 14:32:47,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:32:47,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:47,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:32:47,355 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:32:47,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-02-19 14:32:47,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:32:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:32:47,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:32:47,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:32:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:47,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:32:47,952 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:32:47,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:32:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:32:48,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279539465] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:32:48,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:32:48,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-19 14:32:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924138503] [2024-02-19 14:32:48,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:32:48,023 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 14:32:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:32:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 14:32:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 14:32:48,024 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:32:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1392 places, 1769 transitions, 343993 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:48,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:32:48,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:32:48,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:32:59,504 INFO L124 PetriNetUnfolderBase]: 1918/3834 cut-off events. [2024-02-19 14:32:59,505 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2024-02-19 14:32:59,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373617 conditions, 3834 events. 1918/3834 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28339 event pairs, 8 based on Foata normal form. 0/2958 useless extension candidates. Maximal degree in co-relation 257954. Up to 3802 conditions per place. [2024-02-19 14:32:59,647 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1161 selfloop transitions, 117 changer transitions 511/1790 dead transitions. [2024-02-19 14:32:59,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1420 places, 1790 transitions, 351663 flow [2024-02-19 14:32:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-19 14:32:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-19 14:32:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 231 transitions. [2024-02-19 14:32:59,648 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34632683658170915 [2024-02-19 14:32:59,648 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1397 predicate places. [2024-02-19 14:32:59,648 INFO L507 AbstractCegarLoop]: Abstraction has has 1420 places, 1790 transitions, 351663 flow [2024-02-19 14:32:59,649 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:32:59,649 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:32:59,649 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:32:59,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2024-02-19 14:32:59,857 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:32:59,859 INFO L432 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:32:59,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:32:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 477548801, now seen corresponding path program 89 times [2024-02-19 14:32:59,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:32:59,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141013117] [2024-02-19 14:32:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:32:59,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:32:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:33:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:33:00,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141013117] [2024-02-19 14:33:00,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141013117] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:33:00,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655659417] [2024-02-19 14:33:00,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:33:00,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:33:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:33:00,439 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:33:00,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-02-19 14:33:00,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:33:00,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:33:00,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:33:00,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:33:01,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:33:01,042 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 73 treesize of output 45 [2024-02-19 14:33:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:01,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:33:01,159 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:33:01,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:33:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:01,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655659417] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:33:01,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:33:01,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-02-19 14:33:01,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408553868] [2024-02-19 14:33:01,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:33:01,224 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:33:01,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:33:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:33:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:33:01,225 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:33:01,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1420 places, 1790 transitions, 351663 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:01,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:33:01,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:33:01,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:33:13,020 INFO L124 PetriNetUnfolderBase]: 1927/3850 cut-off events. [2024-02-19 14:33:13,020 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2024-02-19 14:33:13,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379108 conditions, 3850 events. 1927/3850 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28467 event pairs, 4 based on Foata normal form. 0/2980 useless extension candidates. Maximal degree in co-relation 261279. Up to 3819 conditions per place. [2024-02-19 14:33:13,157 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1165 selfloop transitions, 120 changer transitions 528/1814 dead transitions. [2024-02-19 14:33:13,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1453 places, 1814 transitions, 360005 flow [2024-02-19 14:33:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-19 14:33:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-19 14:33:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 317 transitions. [2024-02-19 14:33:13,158 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.372502937720329 [2024-02-19 14:33:13,168 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1430 predicate places. [2024-02-19 14:33:13,169 INFO L507 AbstractCegarLoop]: Abstraction has has 1453 places, 1814 transitions, 360005 flow [2024-02-19 14:33:13,169 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:13,169 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:33:13,169 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:33:13,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-02-19 14:33:13,381 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:33:13,381 INFO L432 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:33:13,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:33:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1106468019, now seen corresponding path program 90 times [2024-02-19 14:33:13,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:33:13,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056766168] [2024-02-19 14:33:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:33:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:33:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:33:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:33:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:33:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056766168] [2024-02-19 14:33:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056766168] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:33:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481264544] [2024-02-19 14:33:14,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:33:14,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:33:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:33:14,477 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:33:14,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-02-19 14:33:14,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:33:14,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:33:14,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 40 conjunts are in the unsatisfiable core [2024-02-19 14:33:14,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:33:14,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:33:14,995 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 46 treesize of output 30 [2024-02-19 14:33:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:15,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:33:15,234 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:33:15,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:33:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:15,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481264544] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:33:15,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:33:15,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 10] total 35 [2024-02-19 14:33:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709448063] [2024-02-19 14:33:15,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:33:15,337 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-19 14:33:15,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:33:15,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-19 14:33:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-02-19 14:33:15,337 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:33:15,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1453 places, 1814 transitions, 360005 flow. Second operand has 35 states, 35 states have (on average 4.714285714285714) internal successors, (165), 35 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:15,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:33:15,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:33:15,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:33:27,607 INFO L124 PetriNetUnfolderBase]: 1929/3854 cut-off events. [2024-02-19 14:33:27,607 INFO L125 PetriNetUnfolderBase]: For 623/623 co-relation queries the response was YES. [2024-02-19 14:33:27,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383531 conditions, 3854 events. 1929/3854 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28457 event pairs, 6 based on Foata normal form. 0/3002 useless extension candidates. Maximal degree in co-relation 264518. Up to 3825 conditions per place. [2024-02-19 14:33:27,907 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1133 selfloop transitions, 151 changer transitions 535/1820 dead transitions. [2024-02-19 14:33:27,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1494 places, 1820 transitions, 364834 flow [2024-02-19 14:33:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-02-19 14:33:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-02-19 14:33:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 372 transitions. [2024-02-19 14:33:27,909 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3675889328063241 [2024-02-19 14:33:27,909 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1471 predicate places. [2024-02-19 14:33:27,909 INFO L507 AbstractCegarLoop]: Abstraction has has 1494 places, 1820 transitions, 364834 flow [2024-02-19 14:33:27,909 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.714285714285714) internal successors, (165), 35 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:27,909 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:33:27,909 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:33:27,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2024-02-19 14:33:28,122 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-02-19 14:33:28,122 INFO L432 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:33:28,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:33:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash -300752925, now seen corresponding path program 91 times [2024-02-19 14:33:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:33:28,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967112339] [2024-02-19 14:33:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:33:28,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:33:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:33:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:33:29,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:33:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967112339] [2024-02-19 14:33:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967112339] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:33:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980918622] [2024-02-19 14:33:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:33:29,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:33:29,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:33:29,293 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:33:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-02-19 14:33:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:33:29,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:33:29,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:33:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:29,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:33:29,932 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:33:29,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:33:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980918622] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:33:29,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:33:29,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-19 14:33:29,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811639259] [2024-02-19 14:33:29,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:33:29,993 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 14:33:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:33:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 14:33:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 14:33:29,995 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:33:30,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1494 places, 1820 transitions, 364834 flow. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:30,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:33:30,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:33:30,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:33:42,230 INFO L124 PetriNetUnfolderBase]: 1925/3850 cut-off events. [2024-02-19 14:33:42,230 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2024-02-19 14:33:42,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386958 conditions, 3850 events. 1925/3850 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28415 event pairs, 2 based on Foata normal form. 0/3002 useless extension candidates. Maximal degree in co-relation 266759. Up to 3821 conditions per place. [2024-02-19 14:33:42,372 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1172 selfloop transitions, 115 changer transitions 551/1839 dead transitions. [2024-02-19 14:33:42,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1529 places, 1839 transitions, 372319 flow [2024-02-19 14:33:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-19 14:33:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-19 14:33:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 252 transitions. [2024-02-19 14:33:42,373 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-02-19 14:33:42,373 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1506 predicate places. [2024-02-19 14:33:42,373 INFO L507 AbstractCegarLoop]: Abstraction has has 1529 places, 1839 transitions, 372319 flow [2024-02-19 14:33:42,374 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:42,374 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:33:42,374 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:33:42,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2024-02-19 14:33:42,586 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-02-19 14:33:42,587 INFO L432 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:33:42,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:33:42,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1472358528, now seen corresponding path program 92 times [2024-02-19 14:33:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:33:42,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357544410] [2024-02-19 14:33:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:33:42,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:33:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:33:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:43,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:33:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357544410] [2024-02-19 14:33:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357544410] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:33:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501457144] [2024-02-19 14:33:43,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:33:43,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:33:43,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:33:43,184 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:33:43,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-02-19 14:33:43,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:33:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:33:43,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:33:43,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:33:43,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:33:43,722 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 65 treesize of output 41 [2024-02-19 14:33:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:33:43,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:33:43,868 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:33:43,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:33:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501457144] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:33:43,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:33:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-02-19 14:33:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254012163] [2024-02-19 14:33:43,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:33:43,964 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:33:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:33:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:33:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:33:43,965 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:33:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1529 places, 1839 transitions, 372319 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 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) [2024-02-19 14:33:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:33:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:33:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:33:56,727 INFO L124 PetriNetUnfolderBase]: 1997/3997 cut-off events. [2024-02-19 14:33:56,727 INFO L125 PetriNetUnfolderBase]: For 636/636 co-relation queries the response was YES. [2024-02-19 14:33:56,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405289 conditions, 3997 events. 1997/3997 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29750 event pairs, 2 based on Foata normal form. 0/3107 useless extension candidates. Maximal degree in co-relation 278784. Up to 3963 conditions per place. [2024-02-19 14:33:56,886 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1226 selfloop transitions, 121 changer transitions 554/1902 dead transitions. [2024-02-19 14:33:56,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1559 places, 1902 transitions, 388877 flow [2024-02-19 14:33:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-19 14:33:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-19 14:33:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 268 transitions. [2024-02-19 14:33:56,888 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3758765778401122 [2024-02-19 14:33:56,888 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1536 predicate places. [2024-02-19 14:33:56,888 INFO L507 AbstractCegarLoop]: Abstraction has has 1559 places, 1902 transitions, 388877 flow [2024-02-19 14:33:56,889 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 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) [2024-02-19 14:33:56,889 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:33:56,889 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:33:56,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2024-02-19 14:33:57,102 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-02-19 14:33:57,102 INFO L432 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:33:57,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:33:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash -111991714, now seen corresponding path program 93 times [2024-02-19 14:33:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:33:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039561319] [2024-02-19 14:33:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:33:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:33:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:33:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:57,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:33:57,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039561319] [2024-02-19 14:33:57,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039561319] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:33:57,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268086367] [2024-02-19 14:33:57,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:33:57,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:33:57,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:33:57,661 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:33:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-02-19 14:33:58,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-19 14:33:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:33:58,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:33:58,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:33:58,305 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-19 14:33:58,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:33:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:58,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:33:58,396 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:33:58,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-02-19 14:33:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:33:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268086367] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:33:58,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:33:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-02-19 14:33:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049896709] [2024-02-19 14:33:58,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:33:58,452 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:33:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:33:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:33:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:33:58,453 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:33:58,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1559 places, 1902 transitions, 388877 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:33:58,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:33:58,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:33:58,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:12,312 INFO L124 PetriNetUnfolderBase]: 1989/3975 cut-off events. [2024-02-19 14:34:12,312 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2024-02-19 14:34:12,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407190 conditions, 3975 events. 1989/3975 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29596 event pairs, 12 based on Foata normal form. 0/3097 useless extension candidates. Maximal degree in co-relation 281517. Up to 3943 conditions per place. [2024-02-19 14:34:12,476 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1242 selfloop transitions, 97 changer transitions 554/1894 dead transitions. [2024-02-19 14:34:12,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1579 places, 1894 transitions, 391019 flow [2024-02-19 14:34:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:34:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:34:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 193 transitions. [2024-02-19 14:34:12,477 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3814229249011858 [2024-02-19 14:34:12,477 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1556 predicate places. [2024-02-19 14:34:12,478 INFO L507 AbstractCegarLoop]: Abstraction has has 1579 places, 1894 transitions, 391019 flow [2024-02-19 14:34:12,478 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:12,478 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:12,478 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:34:12,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-02-19 14:34:12,691 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:12,692 INFO L432 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:34:12,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1889145059, now seen corresponding path program 94 times [2024-02-19 14:34:12,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:12,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125912800] [2024-02-19 14:34:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:34:13,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:13,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125912800] [2024-02-19 14:34:13,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125912800] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:13,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54588506] [2024-02-19 14:34:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:34:13,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:13,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:13,293 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:34:13,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-02-19 14:34:13,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:34:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:34:13,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:34:13,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:13,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:34:13,844 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 58 treesize of output 34 [2024-02-19 14:34:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:34:13,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:13,982 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:34:13,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:34:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:34:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54588506] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:14,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:14,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-02-19 14:34:14,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170792504] [2024-02-19 14:34:14,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:14,057 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:34:14,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:34:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:34:14,057 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:34:14,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1579 places, 1894 transitions, 391019 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:14,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:14,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:34:14,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:28,219 INFO L124 PetriNetUnfolderBase]: 2009/4025 cut-off events. [2024-02-19 14:34:28,219 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2024-02-19 14:34:28,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416139 conditions, 4025 events. 2009/4025 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30055 event pairs, 4 based on Foata normal form. 0/3139 useless extension candidates. Maximal degree in co-relation 287578. Up to 3991 conditions per place. [2024-02-19 14:34:28,386 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1249 selfloop transitions, 106 changer transitions 554/1910 dead transitions. [2024-02-19 14:34:28,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1602 places, 1910 transitions, 398145 flow [2024-02-19 14:34:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-19 14:34:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-19 14:34:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 226 transitions. [2024-02-19 14:34:28,387 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40942028985507245 [2024-02-19 14:34:28,387 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1579 predicate places. [2024-02-19 14:34:28,387 INFO L507 AbstractCegarLoop]: Abstraction has has 1602 places, 1910 transitions, 398145 flow [2024-02-19 14:34:28,387 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:28,388 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:28,388 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:34:28,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-02-19 14:34:28,600 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-02-19 14:34:28,601 INFO L432 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:34:28,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2020297497, now seen corresponding path program 95 times [2024-02-19 14:34:28,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:28,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312842218] [2024-02-19 14:34:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:29,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:29,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312842218] [2024-02-19 14:34:29,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312842218] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:29,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386658861] [2024-02-19 14:34:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:34:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:29,609 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:34:29,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-02-19 14:34:30,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:34:30,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:34:30,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:34:30,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:34:30,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:30,439 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:34:30,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:34:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:34:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386658861] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:30,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:30,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 37 [2024-02-19 14:34:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299082959] [2024-02-19 14:34:30,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:30,500 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-19 14:34:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-19 14:34:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2024-02-19 14:34:30,501 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:34:30,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1602 places, 1910 transitions, 398145 flow. Second operand has 37 states, 37 states have (on average 4.891891891891892) internal successors, (181), 37 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:30,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:30,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:34:30,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:45,329 INFO L124 PetriNetUnfolderBase]: 2025/4053 cut-off events. [2024-02-19 14:34:45,329 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2024-02-19 14:34:45,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423078 conditions, 4053 events. 2025/4053 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30352 event pairs, 2 based on Foata normal form. 0/3163 useless extension candidates. Maximal degree in co-relation 292443. Up to 4019 conditions per place. [2024-02-19 14:34:45,608 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1267 selfloop transitions, 100 changer transitions 554/1922 dead transitions. [2024-02-19 14:34:45,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1620 places, 1922 transitions, 404489 flow [2024-02-19 14:34:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 14:34:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 14:34:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 156 transitions. [2024-02-19 14:34:45,610 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35697940503432496 [2024-02-19 14:34:45,610 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1597 predicate places. [2024-02-19 14:34:45,610 INFO L507 AbstractCegarLoop]: Abstraction has has 1620 places, 1922 transitions, 404489 flow [2024-02-19 14:34:45,610 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.891891891891892) internal successors, (181), 37 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:45,610 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:45,610 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:34:45,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-02-19 14:34:45,824 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-02-19 14:34:45,824 INFO L432 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:34:45,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1015404379, now seen corresponding path program 96 times [2024-02-19 14:34:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:45,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330572950] [2024-02-19 14:34:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:45,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:46,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:46,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330572950] [2024-02-19 14:34:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330572950] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:46,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637639279] [2024-02-19 14:34:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:34:46,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:46,827 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:34:46,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-02-19 14:34:47,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:34:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:34:47,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2024-02-19 14:34:47,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:47,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:34:47,463 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 65 treesize of output 41 [2024-02-19 14:34:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:34:47,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:47,650 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:34:47,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:34:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:34:47,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637639279] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:47,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:47,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 10] total 36 [2024-02-19 14:34:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681418031] [2024-02-19 14:34:47,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:47,746 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-19 14:34:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-19 14:34:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2024-02-19 14:34:47,747 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:34:47,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1620 places, 1922 transitions, 404489 flow. Second operand has 36 states, 36 states have (on average 4.611111111111111) internal successors, (166), 36 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:47,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:34:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:02,123 INFO L124 PetriNetUnfolderBase]: 2007/4006 cut-off events. [2024-02-19 14:35:02,123 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2024-02-19 14:35:02,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422429 conditions, 4006 events. 2007/4006 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29837 event pairs, 12 based on Foata normal form. 0/3132 useless extension candidates. Maximal degree in co-relation 292684. Up to 3975 conditions per place. [2024-02-19 14:35:02,298 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1221 selfloop transitions, 124 changer transitions 562/1908 dead transitions. [2024-02-19 14:35:02,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1651 places, 1908 transitions, 405351 flow [2024-02-19 14:35:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-19 14:35:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-19 14:35:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 263 transitions. [2024-02-19 14:35:02,299 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3465085638998682 [2024-02-19 14:35:02,299 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1628 predicate places. [2024-02-19 14:35:02,300 INFO L507 AbstractCegarLoop]: Abstraction has has 1651 places, 1908 transitions, 405351 flow [2024-02-19 14:35:02,300 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.611111111111111) internal successors, (166), 36 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:02,300 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:02,301 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:02,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2024-02-19 14:35:02,514 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:02,514 INFO L432 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2010214106, now seen corresponding path program 97 times [2024-02-19 14:35:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:02,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742130824] [2024-02-19 14:35:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742130824] [2024-02-19 14:35:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742130824] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18572610] [2024-02-19 14:35:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:35:03,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:03,121 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-02-19 14:35:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:03,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:35:03,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:03,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:35:03,677 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 81 treesize of output 45 [2024-02-19 14:35:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:03,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:03,832 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:35:03,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:35:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18572610] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:03,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:03,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-02-19 14:35:03,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559615359] [2024-02-19 14:35:03,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:03,899 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:35:03,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:35:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:35:03,900 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:35:03,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1651 places, 1908 transitions, 405351 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 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) [2024-02-19 14:35:03,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:03,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:35:03,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:17,563 INFO L124 PetriNetUnfolderBase]: 2008/4018 cut-off events. [2024-02-19 14:35:17,564 INFO L125 PetriNetUnfolderBase]: For 651/651 co-relation queries the response was YES. [2024-02-19 14:35:17,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427590 conditions, 4018 events. 2008/4018 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29875 event pairs, 8 based on Foata normal form. 0/3146 useless extension candidates. Maximal degree in co-relation 295980. Up to 3986 conditions per place. [2024-02-19 14:35:17,740 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1248 selfloop transitions, 99 changer transitions 564/1912 dead transitions. [2024-02-19 14:35:17,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1671 places, 1912 transitions, 410027 flow [2024-02-19 14:35:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-19 14:35:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-19 14:35:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 199 transitions. [2024-02-19 14:35:17,742 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41200828157349895 [2024-02-19 14:35:17,742 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1648 predicate places. [2024-02-19 14:35:17,742 INFO L507 AbstractCegarLoop]: Abstraction has has 1671 places, 1912 transitions, 410027 flow [2024-02-19 14:35:17,742 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 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) [2024-02-19 14:35:17,742 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:17,742 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:17,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:17,955 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:17,955 INFO L432 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:17,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1685129284, now seen corresponding path program 98 times [2024-02-19 14:35:17,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:17,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805528380] [2024-02-19 14:35:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 14:35:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805528380] [2024-02-19 14:35:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805528380] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280468606] [2024-02-19 14:35:18,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:35:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:18,867 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:18,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-02-19 14:35:19,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:35:19,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:19,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2024-02-19 14:35:19,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:19,612 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-19 14:35:19,612 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 46 treesize of output 26 [2024-02-19 14:35:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:35:19,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:19,867 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:35:19,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:35:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280468606] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:19,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:19,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 33 [2024-02-19 14:35:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283497351] [2024-02-19 14:35:19,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:19,951 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 14:35:19,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 14:35:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 14:35:19,951 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:35:19,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1671 places, 1912 transitions, 410027 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:19,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:19,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:35:19,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:34,745 INFO L124 PetriNetUnfolderBase]: 2028/4073 cut-off events. [2024-02-19 14:35:34,745 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2024-02-19 14:35:34,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437317 conditions, 4073 events. 2028/4073 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30486 event pairs, 6 based on Foata normal form. 0/3191 useless extension candidates. Maximal degree in co-relation 301770. Up to 4039 conditions per place. [2024-02-19 14:35:34,915 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1255 selfloop transitions, 105 changer transitions 574/1935 dead transitions. [2024-02-19 14:35:34,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1690 places, 1935 transitions, 418835 flow [2024-02-19 14:35:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:35:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:35:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 165 transitions. [2024-02-19 14:35:34,917 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-02-19 14:35:34,917 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1667 predicate places. [2024-02-19 14:35:34,917 INFO L507 AbstractCegarLoop]: Abstraction has has 1690 places, 1935 transitions, 418835 flow [2024-02-19 14:35:34,917 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:34,917 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:34,917 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:34,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:35,131 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-02-19 14:35:35,131 INFO L432 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:35,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1503867840, now seen corresponding path program 99 times [2024-02-19 14:35:35,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899751119] [2024-02-19 14:35:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:36,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899751119] [2024-02-19 14:35:36,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899751119] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994209016] [2024-02-19 14:35:36,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:35:36,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:36,293 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:36,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-02-19 14:35:36,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-19 14:35:36,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:36,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:35:36,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:36,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:35:36,954 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 46 treesize of output 30 [2024-02-19 14:35:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:36,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:37,147 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:35:37,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:35:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994209016] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:37,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:37,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 33 [2024-02-19 14:35:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052796354] [2024-02-19 14:35:37,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:37,224 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 14:35:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 14:35:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 14:35:37,225 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:35:37,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1690 places, 1935 transitions, 418835 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:37,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:37,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:35:37,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:51,757 INFO L124 PetriNetUnfolderBase]: 2018/4052 cut-off events. [2024-02-19 14:35:51,757 INFO L125 PetriNetUnfolderBase]: For 669/669 co-relation queries the response was YES. [2024-02-19 14:35:51,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439178 conditions, 4052 events. 2018/4052 cut-off events. For 669/669 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30325 event pairs, 12 based on Foata normal form. 0/3178 useless extension candidates. Maximal degree in co-relation 303474. Up to 4019 conditions per place. [2024-02-19 14:35:51,945 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1248 selfloop transitions, 104 changer transitions 574/1927 dead transitions. [2024-02-19 14:35:51,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1711 places, 1927 transitions, 420953 flow [2024-02-19 14:35:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:35:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:35:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 160 transitions. [2024-02-19 14:35:51,946 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.31620553359683795 [2024-02-19 14:35:51,947 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1688 predicate places. [2024-02-19 14:35:51,947 INFO L507 AbstractCegarLoop]: Abstraction has has 1711 places, 1927 transitions, 420953 flow [2024-02-19 14:35:51,947 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:51,947 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:51,947 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:51,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:52,161 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:52,161 INFO L432 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:52,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash -718987843, now seen corresponding path program 100 times [2024-02-19 14:35:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705448887] [2024-02-19 14:35:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:52,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:52,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705448887] [2024-02-19 14:35:52,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705448887] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:52,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033656924] [2024-02-19 14:35:52,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:35:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:52,636 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:52,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-02-19 14:35:53,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:35:53,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:53,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:35:53,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:53,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:35:53,306 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 81 treesize of output 45 [2024-02-19 14:35:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:53,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:53,473 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:35:53,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:35:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:35:53,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033656924] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:53,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:53,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-02-19 14:35:53,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409929645] [2024-02-19 14:35:53,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:53,516 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:35:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:35:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:35:53,517 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:35:53,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1711 places, 1927 transitions, 420953 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 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) [2024-02-19 14:35:53,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:53,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:35:53,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:08,359 INFO L124 PetriNetUnfolderBase]: 2052/4119 cut-off events. [2024-02-19 14:36:08,359 INFO L125 PetriNetUnfolderBase]: For 673/673 co-relation queries the response was YES. [2024-02-19 14:36:08,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450470 conditions, 4119 events. 2052/4119 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30987 event pairs, 2 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 311318. Up to 4085 conditions per place. [2024-02-19 14:36:08,531 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1287 selfloop transitions, 96 changer transitions 580/1964 dead transitions. [2024-02-19 14:36:08,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1730 places, 1964 transitions, 432969 flow [2024-02-19 14:36:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:36:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:36:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 185 transitions. [2024-02-19 14:36:08,532 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40217391304347827 [2024-02-19 14:36:08,532 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1707 predicate places. [2024-02-19 14:36:08,532 INFO L507 AbstractCegarLoop]: Abstraction has has 1730 places, 1964 transitions, 432969 flow [2024-02-19 14:36:08,532 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 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) [2024-02-19 14:36:08,533 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:08,533 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2024-02-19 14:36:08,740 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:08,740 INFO L432 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:08,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:08,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1100809698, now seen corresponding path program 101 times [2024-02-19 14:36:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:08,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107437473] [2024-02-19 14:36:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:36:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:09,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107437473] [2024-02-19 14:36:09,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107437473] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:09,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378426405] [2024-02-19 14:36:09,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:36:09,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:09,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:09,607 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:36:09,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-02-19 14:36:10,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:36:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:10,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:36:10,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:10,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:36:10,375 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 52 treesize of output 34 [2024-02-19 14:36:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:36:10,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:10,542 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:36:10,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:36:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:36:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378426405] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:10,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 32 [2024-02-19 14:36:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027911820] [2024-02-19 14:36:10,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:10,627 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-19 14:36:10,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:10,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-19 14:36:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2024-02-19 14:36:10,628 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:36:10,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1730 places, 1964 transitions, 432969 flow. Second operand has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:10,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:10,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:36:10,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:26,277 INFO L124 PetriNetUnfolderBase]: 2046/4102 cut-off events. [2024-02-19 14:36:26,278 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2024-02-19 14:36:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452781 conditions, 4102 events. 2046/4102 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30768 event pairs, 2 based on Foata normal form. 0/3222 useless extension candidates. Maximal degree in co-relation 313482. Up to 4069 conditions per place. [2024-02-19 14:36:26,460 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1271 selfloop transitions, 101 changer transitions 584/1957 dead transitions. [2024-02-19 14:36:26,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1745 places, 1957 transitions, 435335 flow [2024-02-19 14:36:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 14:36:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 14:36:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-02-19 14:36:26,462 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35038363171355497 [2024-02-19 14:36:26,462 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1722 predicate places. [2024-02-19 14:36:26,462 INFO L507 AbstractCegarLoop]: Abstraction has has 1745 places, 1957 transitions, 435335 flow [2024-02-19 14:36:26,462 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:26,462 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:26,462 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:26,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-02-19 14:36:26,668 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-02-19 14:36:26,668 INFO L432 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:26,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash 983895067, now seen corresponding path program 102 times [2024-02-19 14:36:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759538499] [2024-02-19 14:36:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:27,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759538499] [2024-02-19 14:36:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759538499] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472980980] [2024-02-19 14:36:27,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:36:27,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:27,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:27,809 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:36:27,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-02-19 14:36:28,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:36:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:28,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 43 conjunts are in the unsatisfiable core [2024-02-19 14:36:28,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:28,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:36:28,513 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 46 treesize of output 30 [2024-02-19 14:36:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:36:28,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:28,749 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:36:28,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:36:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:36:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472980980] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:28,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:28,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 10] total 36 [2024-02-19 14:36:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191750069] [2024-02-19 14:36:28,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:28,838 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-02-19 14:36:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-02-19 14:36:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2024-02-19 14:36:28,838 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:36:28,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1745 places, 1957 transitions, 435335 flow. Second operand has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:28,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:28,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:36:28,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:44,405 INFO L124 PetriNetUnfolderBase]: 2042/4089 cut-off events. [2024-02-19 14:36:44,406 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2024-02-19 14:36:44,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455509 conditions, 4089 events. 2042/4089 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30574 event pairs, 10 based on Foata normal form. 0/3213 useless extension candidates. Maximal degree in co-relation 315410. Up to 4057 conditions per place. [2024-02-19 14:36:44,588 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1251 selfloop transitions, 111 changer transitions 586/1949 dead transitions. [2024-02-19 14:36:44,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1772 places, 1949 transitions, 437449 flow [2024-02-19 14:36:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-19 14:36:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-19 14:36:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 220 transitions. [2024-02-19 14:36:44,589 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32983508245877063 [2024-02-19 14:36:44,590 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1749 predicate places. [2024-02-19 14:36:44,590 INFO L507 AbstractCegarLoop]: Abstraction has has 1772 places, 1949 transitions, 437449 flow [2024-02-19 14:36:44,590 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:44,590 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:44,590 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:44,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-02-19 14:36:44,802 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:44,802 INFO L432 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:44,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1563959295, now seen corresponding path program 103 times [2024-02-19 14:36:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:44,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145025937] [2024-02-19 14:36:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:46,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:46,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145025937] [2024-02-19 14:36:46,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145025937] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:46,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699818373] [2024-02-19 14:36:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:36:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:46,135 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:36:46,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-02-19 14:36:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:46,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:36:46,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:46,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:36:46,748 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 58 treesize of output 34 [2024-02-19 14:36:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:36:46,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:46,949 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:36:46,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:36:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:36:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699818373] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:47,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-19 14:36:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303244614] [2024-02-19 14:36:47,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:47,005 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 14:36:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 14:36:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 14:36:47,005 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:36:47,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1772 places, 1949 transitions, 437449 flow. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:47,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:47,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:36:47,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:37:04,141 INFO L124 PetriNetUnfolderBase]: 2126/4257 cut-off events. [2024-02-19 14:37:04,141 INFO L125 PetriNetUnfolderBase]: For 700/700 co-relation queries the response was YES. [2024-02-19 14:37:04,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478124 conditions, 4257 events. 2126/4257 cut-off events. For 700/700 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32181 event pairs, 6 based on Foata normal form. 0/3345 useless extension candidates. Maximal degree in co-relation 330882. Up to 4221 conditions per place. [2024-02-19 14:37:04,508 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1335 selfloop transitions, 104 changer transitions 603/2043 dead transitions. [2024-02-19 14:37:04,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1813 places, 2043 transitions, 462649 flow [2024-02-19 14:37:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-02-19 14:37:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-02-19 14:37:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 326 transitions. [2024-02-19 14:37:04,510 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33747412008281574 [2024-02-19 14:37:04,510 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1790 predicate places. [2024-02-19 14:37:04,510 INFO L507 AbstractCegarLoop]: Abstraction has has 1813 places, 2043 transitions, 462649 flow [2024-02-19 14:37:04,510 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:04,511 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:37:04,511 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:37:04,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2024-02-19 14:37:04,719 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-02-19 14:37:04,719 INFO L432 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:37:04,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:37:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash 840157832, now seen corresponding path program 104 times [2024-02-19 14:37:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:37:04,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330211988] [2024-02-19 14:37:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:37:04,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:37:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:37:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330211988] [2024-02-19 14:37:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330211988] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:37:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045966868] [2024-02-19 14:37:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:37:05,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:37:05,300 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:37:05,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-02-19 14:37:05,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:37:05,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:37:05,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-19 14:37:05,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:37:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:37:05,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:37:06,122 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:37:06,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:37:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045966868] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:37:06,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:37:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 23 [2024-02-19 14:37:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259144374] [2024-02-19 14:37:06,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:37:06,187 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:37:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:37:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:37:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:37:06,188 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:37:06,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1813 places, 2043 transitions, 462649 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 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) [2024-02-19 14:37:06,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:37:06,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:37:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:37:23,162 INFO L124 PetriNetUnfolderBase]: 2118/4249 cut-off events. [2024-02-19 14:37:23,163 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-19 14:37:23,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481439 conditions, 4249 events. 2118/4249 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32191 event pairs, 6 based on Foata normal form. 0/3345 useless extension candidates. Maximal degree in co-relation 333354. Up to 4213 conditions per place. [2024-02-19 14:37:23,347 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1367 selfloop transitions, 54 changer transitions 619/2041 dead transitions. [2024-02-19 14:37:23,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1834 places, 2041 transitions, 466277 flow [2024-02-19 14:37:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:37:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:37:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 177 transitions. [2024-02-19 14:37:23,348 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34980237154150196 [2024-02-19 14:37:23,348 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1811 predicate places. [2024-02-19 14:37:23,348 INFO L507 AbstractCegarLoop]: Abstraction has has 1834 places, 2041 transitions, 466277 flow [2024-02-19 14:37:23,348 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 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) [2024-02-19 14:37:23,349 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:37:23,349 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:37:23,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2024-02-19 14:37:23,561 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:23,562 INFO L432 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:37:23,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:37:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1979860831, now seen corresponding path program 105 times [2024-02-19 14:37:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:37:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316739820] [2024-02-19 14:37:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:37:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:37:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:37:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316739820] [2024-02-19 14:37:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316739820] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:37:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223354863] [2024-02-19 14:37:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:37:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:37:24,082 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:37:24,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-02-19 14:37:24,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:37:24,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:37:24,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:37:24,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:37:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:24,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:37:24,920 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:37:24,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:37:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223354863] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:37:24,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:37:24,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-02-19 14:37:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338249988] [2024-02-19 14:37:24,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:37:24,985 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:37:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:37:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:37:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:37:24,986 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:37:24,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1834 places, 2041 transitions, 466277 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:24,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:37:24,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:37:24,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:37:41,642 INFO L124 PetriNetUnfolderBase]: 2114/4245 cut-off events. [2024-02-19 14:37:41,643 INFO L125 PetriNetUnfolderBase]: For 700/700 co-relation queries the response was YES. [2024-02-19 14:37:41,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485198 conditions, 4245 events. 2114/4245 cut-off events. For 700/700 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32219 event pairs, 6 based on Foata normal form. 0/3345 useless extension candidates. Maximal degree in co-relation 335818. Up to 4209 conditions per place. [2024-02-19 14:37:41,835 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1382 selfloop transitions, 39 changer transitions 630/2052 dead transitions. [2024-02-19 14:37:41,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1851 places, 2052 transitions, 472893 flow [2024-02-19 14:37:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-19 14:37:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-19 14:37:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 134 transitions. [2024-02-19 14:37:41,836 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32367149758454106 [2024-02-19 14:37:41,837 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1828 predicate places. [2024-02-19 14:37:41,837 INFO L507 AbstractCegarLoop]: Abstraction has has 1851 places, 2052 transitions, 472893 flow [2024-02-19 14:37:41,837 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:41,837 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:37:41,837 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:37:41,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2024-02-19 14:37:42,050 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-02-19 14:37:42,050 INFO L432 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:37:42,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:37:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1945781150, now seen corresponding path program 106 times [2024-02-19 14:37:42,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:37:42,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882195619] [2024-02-19 14:37:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:37:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:37:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:37:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:37:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882195619] [2024-02-19 14:37:42,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882195619] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:37:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826121855] [2024-02-19 14:37:42,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:37:42,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:37:42,815 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:37:42,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-02-19 14:37:43,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:37:43,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:37:43,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:37:43,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:37:43,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:37:43,428 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 58 treesize of output 34 [2024-02-19 14:37:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:43,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:37:43,596 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:37:43,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:37:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:37:43,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826121855] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:37:43,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:37:43,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-02-19 14:37:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196817321] [2024-02-19 14:37:43,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:37:43,673 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:37:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:37:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:37:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:37:43,674 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:37:43,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1851 places, 2052 transitions, 472893 flow. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:43,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:37:43,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:37:43,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:38:01,785 INFO L124 PetriNetUnfolderBase]: 2154/4345 cut-off events. [2024-02-19 14:38:01,786 INFO L125 PetriNetUnfolderBase]: For 706/706 co-relation queries the response was YES. [2024-02-19 14:38:01,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500565 conditions, 4345 events. 2154/4345 cut-off events. For 706/706 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33226 event pairs, 6 based on Foata normal form. 0/3429 useless extension candidates. Maximal degree in co-relation 346162. Up to 4305 conditions per place. [2024-02-19 14:38:01,990 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1369 selfloop transitions, 82 changer transitions 641/2093 dead transitions. [2024-02-19 14:38:01,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1877 places, 2093 transitions, 486531 flow [2024-02-19 14:38:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-19 14:38:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-19 14:38:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 232 transitions. [2024-02-19 14:38:01,991 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37359098228663445 [2024-02-19 14:38:01,991 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1854 predicate places. [2024-02-19 14:38:01,991 INFO L507 AbstractCegarLoop]: Abstraction has has 1877 places, 2093 transitions, 486531 flow [2024-02-19 14:38:01,991 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:01,991 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:38:01,992 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:38:02,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-02-19 14:38:02,200 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-02-19 14:38:02,200 INFO L432 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:38:02,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:38:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1304920354, now seen corresponding path program 107 times [2024-02-19 14:38:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:38:02,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649751379] [2024-02-19 14:38:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:38:02,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:38:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:38:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:02,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:38:02,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649751379] [2024-02-19 14:38:02,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649751379] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:38:02,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765883892] [2024-02-19 14:38:02,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:38:02,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:38:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:38:02,787 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:38:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-02-19 14:38:03,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:38:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:38:03,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 14:38:03,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:38:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:03,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:38:03,611 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:38:03,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:38:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765883892] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:38:03,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:38:03,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-02-19 14:38:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536358494] [2024-02-19 14:38:03,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:38:03,674 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:38:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:38:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:38:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:38:03,674 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:38:03,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1877 places, 2093 transitions, 486531 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:03,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:38:03,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:38:03,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:38:22,099 INFO L124 PetriNetUnfolderBase]: 2134/4303 cut-off events. [2024-02-19 14:38:22,099 INFO L125 PetriNetUnfolderBase]: For 686/686 co-relation queries the response was YES. [2024-02-19 14:38:22,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500188 conditions, 4303 events. 2134/4303 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32841 event pairs, 8 based on Foata normal form. 0/3403 useless extension candidates. Maximal degree in co-relation 347274. Up to 4265 conditions per place. [2024-02-19 14:38:22,304 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1381 selfloop transitions, 39 changer transitions 667/2088 dead transitions. [2024-02-19 14:38:22,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1893 places, 2088 transitions, 489533 flow [2024-02-19 14:38:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 14:38:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 14:38:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-02-19 14:38:22,305 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35038363171355497 [2024-02-19 14:38:22,306 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1870 predicate places. [2024-02-19 14:38:22,306 INFO L507 AbstractCegarLoop]: Abstraction has has 1893 places, 2088 transitions, 489533 flow [2024-02-19 14:38:22,306 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:22,306 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:38:22,306 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:38:22,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2024-02-19 14:38:22,519 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-02-19 14:38:22,520 INFO L432 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:38:22,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:38:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -818385057, now seen corresponding path program 108 times [2024-02-19 14:38:22,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:38:22,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222822127] [2024-02-19 14:38:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:38:22,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:38:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:38:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:38:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222822127] [2024-02-19 14:38:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222822127] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:38:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185728666] [2024-02-19 14:38:23,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:38:23,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:38:23,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:38:23,131 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:38:23,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-02-19 14:38:23,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:38:23,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:38:23,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 57 conjunts are in the unsatisfiable core [2024-02-19 14:38:23,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:38:24,050 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-19 14:38:24,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-19 14:38:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-02-19 14:38:24,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:38:24,360 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:38:24,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:38:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185728666] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:38:24,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:38:24,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 31 [2024-02-19 14:38:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598732276] [2024-02-19 14:38:24,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:38:24,431 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:38:24,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:38:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:38:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:38:24,432 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:38:24,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1893 places, 2088 transitions, 489533 flow. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:24,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:38:24,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:38:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:38:44,281 INFO L124 PetriNetUnfolderBase]: 2189/4412 cut-off events. [2024-02-19 14:38:44,282 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-02-19 14:38:44,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517216 conditions, 4412 events. 2189/4412 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33893 event pairs, 6 based on Foata normal form. 1/3493 useless extension candidates. Maximal degree in co-relation 357912. Up to 4373 conditions per place. [2024-02-19 14:38:44,489 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1382 selfloop transitions, 87 changer transitions 670/2140 dead transitions. [2024-02-19 14:38:44,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1930 places, 2140 transitions, 506012 flow [2024-02-19 14:38:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-19 14:38:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-19 14:38:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 295 transitions. [2024-02-19 14:38:44,497 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33752860411899316 [2024-02-19 14:38:44,497 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1907 predicate places. [2024-02-19 14:38:44,497 INFO L507 AbstractCegarLoop]: Abstraction has has 1930 places, 2140 transitions, 506012 flow [2024-02-19 14:38:44,497 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:44,497 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:38:44,497 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:38:44,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-02-19 14:38:44,711 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2024-02-19 14:38:44,711 INFO L432 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:38:44,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:38:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash 138923615, now seen corresponding path program 109 times [2024-02-19 14:38:44,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:38:44,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110460949] [2024-02-19 14:38:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:38:44,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:38:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:38:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:38:45,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:38:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110460949] [2024-02-19 14:38:45,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110460949] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:38:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572928721] [2024-02-19 14:38:45,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:38:45,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:38:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:38:45,519 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:38:45,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-02-19 14:38:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:38:46,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:38:46,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:38:46,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:38:46,138 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 58 treesize of output 34 [2024-02-19 14:38:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:46,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:38:46,288 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:38:46,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:38:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:38:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572928721] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:38:46,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:38:46,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-02-19 14:38:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293688542] [2024-02-19 14:38:46,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:38:46,360 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-19 14:38:46,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:38:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-19 14:38:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-02-19 14:38:46,361 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:38:46,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1930 places, 2140 transitions, 506012 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:46,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:38:46,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:38:46,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:39:06,471 INFO L124 PetriNetUnfolderBase]: 2175/4380 cut-off events. [2024-02-19 14:39:06,472 INFO L125 PetriNetUnfolderBase]: For 710/710 co-relation queries the response was YES. [2024-02-19 14:39:06,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518019 conditions, 4380 events. 2175/4380 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33589 event pairs, 4 based on Foata normal form. 0/3474 useless extension candidates. Maximal degree in co-relation 358327. Up to 4343 conditions per place. [2024-02-19 14:39:06,676 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1358 selfloop transitions, 88 changer transitions 674/2121 dead transitions. [2024-02-19 14:39:06,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1959 places, 2121 transitions, 505756 flow [2024-02-19 14:39:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-19 14:39:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-19 14:39:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 246 transitions. [2024-02-19 14:39:06,677 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3450210378681627 [2024-02-19 14:39:06,678 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1936 predicate places. [2024-02-19 14:39:06,678 INFO L507 AbstractCegarLoop]: Abstraction has has 1959 places, 2121 transitions, 505756 flow [2024-02-19 14:39:06,678 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:39:06,678 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:39:06,678 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:39:06,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-02-19 14:39:06,892 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:39:06,892 INFO L432 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:39:06,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:39:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1429698347, now seen corresponding path program 110 times [2024-02-19 14:39:06,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:39:06,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733001867] [2024-02-19 14:39:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:39:06,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:39:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:39:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:39:07,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:39:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733001867] [2024-02-19 14:39:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733001867] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:39:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64037541] [2024-02-19 14:39:07,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:39:07,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:39:07,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:39:07,725 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:39:07,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-02-19 14:39:08,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:39:08,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:39:08,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:39:08,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:39:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-19 14:39:08,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:39:08,554 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:39:08,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:39:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:39:08,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64037541] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:39:08,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:39:08,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 28 [2024-02-19 14:39:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818797305] [2024-02-19 14:39:08,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:39:08,608 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-19 14:39:08,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:39:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-19 14:39:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-02-19 14:39:08,609 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:39:08,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1959 places, 2121 transitions, 505756 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:39:08,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:39:08,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:39:08,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:39:28,193 INFO L124 PetriNetUnfolderBase]: 2225/4465 cut-off events. [2024-02-19 14:39:28,193 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-02-19 14:39:28,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532693 conditions, 4465 events. 2225/4465 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34208 event pairs, 8 based on Foata normal form. 0/3553 useless extension candidates. Maximal degree in co-relation 368538. Up to 4429 conditions per place. [2024-02-19 14:39:28,516 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1410 selfloop transitions, 74 changer transitions 674/2159 dead transitions. [2024-02-19 14:39:28,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1982 places, 2159 transitions, 519134 flow [2024-02-19 14:39:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-19 14:39:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-19 14:39:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 204 transitions. [2024-02-19 14:39:28,517 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3411371237458194 [2024-02-19 14:39:28,518 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1959 predicate places. [2024-02-19 14:39:28,518 INFO L507 AbstractCegarLoop]: Abstraction has has 1982 places, 2159 transitions, 519134 flow [2024-02-19 14:39:28,518 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:39:28,518 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:39:28,518 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:39:28,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-02-19 14:39:28,720 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:39:28,720 INFO L432 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:39:28,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:39:28,721 INFO L85 PathProgramCache]: Analyzing trace with hash 19825506, now seen corresponding path program 111 times [2024-02-19 14:39:28,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:39:28,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205460876] [2024-02-19 14:39:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:39:28,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:39:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:39:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:39:29,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:39:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205460876] [2024-02-19 14:39:29,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205460876] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:39:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270753279] [2024-02-19 14:39:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:39:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:39:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:39:29,120 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:39:29,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-02-19 14:39:29,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:39:29,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:39:29,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:39:29,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:39:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:39:29,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:39:29,932 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:39:29,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-19 14:39:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:39:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270753279] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:39:29,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:39:29,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-02-19 14:39:29,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897590330] [2024-02-19 14:39:29,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:39:29,993 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:39:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:39:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:39:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:39:29,994 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:39:29,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1982 places, 2159 transitions, 519134 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:39:29,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:39:29,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:39:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:39:50,788 INFO L124 PetriNetUnfolderBase]: 2238/4476 cut-off events. [2024-02-19 14:39:50,788 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2024-02-19 14:39:50,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538694 conditions, 4476 events. 2238/4476 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34199 event pairs, 12 based on Foata normal form. 0/3566 useless extension candidates. Maximal degree in co-relation 374876. Up to 4442 conditions per place. [2024-02-19 14:39:51,144 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1428 selfloop transitions, 54 changer transitions 682/2165 dead transitions. [2024-02-19 14:39:51,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2005 places, 2165 transitions, 524890 flow [2024-02-19 14:39:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-19 14:39:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-19 14:39:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 183 transitions. [2024-02-19 14:39:51,145 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33152173913043476 [2024-02-19 14:39:51,146 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1982 predicate places. [2024-02-19 14:39:51,146 INFO L507 AbstractCegarLoop]: Abstraction has has 2005 places, 2165 transitions, 524890 flow [2024-02-19 14:39:51,146 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:39:51,146 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:39:51,146 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:39:51,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2024-02-19 14:39:51,357 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:39:51,357 INFO L432 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:39:51,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:39:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1946128004, now seen corresponding path program 112 times [2024-02-19 14:39:51,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:39:51,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098466559] [2024-02-19 14:39:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:39:51,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:39:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:39:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:39:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:39:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098466559] [2024-02-19 14:39:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098466559] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:39:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544539540] [2024-02-19 14:39:52,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:39:52,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:39:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:39:52,621 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:39:52,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-02-19 14:39:53,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:39:53,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:39:53,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:39:53,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:39:53,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:39:53,313 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 58 treesize of output 34 [2024-02-19 14:39:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:39:53,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:39:53,554 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-19 14:39:53,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-02-19 14:39:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:39:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544539540] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:39:53,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:39:53,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-19 14:39:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115786338] [2024-02-19 14:39:53,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:39:53,623 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 14:39:53,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:39:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 14:39:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 14:39:53,623 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:39:53,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2005 places, 2165 transitions, 524890 flow. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:39:53,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:39:53,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:39:53,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:40:14,713 INFO L124 PetriNetUnfolderBase]: 2226/4442 cut-off events. [2024-02-19 14:40:14,713 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-02-19 14:40:14,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539230 conditions, 4442 events. 2226/4442 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33890 event pairs, 8 based on Foata normal form. 0/3540 useless extension candidates. Maximal degree in co-relation 376022. Up to 4410 conditions per place. [2024-02-19 14:40:14,926 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1391 selfloop transitions, 77 changer transitions 682/2151 dead transitions. [2024-02-19 14:40:14,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2030 places, 2151 transitions, 525790 flow [2024-02-19 14:40:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 14:40:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 14:40:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 205 transitions. [2024-02-19 14:40:14,927 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.31832298136645965 [2024-02-19 14:40:14,927 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2007 predicate places. [2024-02-19 14:40:14,927 INFO L507 AbstractCegarLoop]: Abstraction has has 2030 places, 2151 transitions, 525790 flow [2024-02-19 14:40:14,928 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:40:14,928 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:40:14,928 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:40:14,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-02-19 14:40:15,136 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:40:15,136 INFO L432 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:40:15,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:40:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash -49315045, now seen corresponding path program 113 times [2024-02-19 14:40:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:40:15,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179449151] [2024-02-19 14:40:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:40:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:40:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:40:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-19 14:40:15,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:40:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179449151] [2024-02-19 14:40:15,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179449151] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:40:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908034796] [2024-02-19 14:40:15,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:40:15,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:40:15,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:40:15,970 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:40:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-02-19 14:40:16,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:40:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:40:16,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:40:16,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:40:16,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:40:16,741 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 65 treesize of output 41 [2024-02-19 14:40:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:40:16,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:40:16,884 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-19 14:40:16,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-02-19 14:40:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-19 14:40:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908034796] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:40:16,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:40:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-02-19 14:40:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839556599] [2024-02-19 14:40:16,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:40:16,961 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:40:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:40:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:40:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:40:16,961 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-19 14:40:16,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2030 places, 2151 transitions, 525790 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:40:16,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:40:16,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-19 14:40:16,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15