./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:25:31,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:25:31,766 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:25:31,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:25:31,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:25:31,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:25:31,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:25:31,796 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:25:31,797 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:25:31,800 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:25:31,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:25:31,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:25:31,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:25:31,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:25:31,802 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:25:31,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:25:31,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:25:31,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:25:31,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:25:31,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:25:31,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:25:31,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:25:31,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:25:31,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:25:31,805 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:25:31,805 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:25:31,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:25:31,805 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:25:31,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:25:31,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:25:31,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:25:31,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:25:31,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:25:31,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:25:31,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:25:31,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:25:31,815 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:25:31,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:25:31,815 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:25:31,815 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:25:31,815 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:25:31,816 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:25:31,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:25:31,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-01-27 15:25:32,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:25:32,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:25:32,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:25:32,061 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:25:32,061 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:25:32,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-01-27 15:25:33,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:25:33,213 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:25:33,218 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-01-27 15:25:33,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d18bde4c/39a797cad0624927be7ea162cf89d6c6/FLAG370515475 [2024-01-27 15:25:33,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d18bde4c/39a797cad0624927be7ea162cf89d6c6 [2024-01-27 15:25:33,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:25:33,237 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:25:33,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:25:33,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:25:33,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:25:33,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@baae4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33, skipping insertion in model container [2024-01-27 15:25:33,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,261 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:25:33,404 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-nzb-file-symm.wvr.c[4955,4968] [2024-01-27 15:25:33,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:25:33,418 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:25:33,439 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-nzb-file-symm.wvr.c[4955,4968] [2024-01-27 15:25:33,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:25:33,454 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:25:33,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33 WrapperNode [2024-01-27 15:25:33,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:25:33,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:25:33,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:25:33,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:25:33,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,506 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 409 [2024-01-27 15:25:33,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:25:33,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:25:33,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:25:33,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:25:33,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,539 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 2, 18, 2]. 75 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]. [2024-01-27 15:25:33,544 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,544 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,559 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:25:33,565 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:25:33,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:25:33,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:25:33,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (1/1) ... [2024-01-27 15:25:33,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:25:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:33,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:25:33,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:25:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:25:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:25:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:25:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:25:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:25:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:25:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:25:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:25:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:25:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:25:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:25:33,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:25:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:25:33,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:25:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:25:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:25:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:25:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:25:33,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:25:33,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:25:33,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:25:33,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:25:33,724 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:25:33,874 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:25:33,876 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:25:34,287 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:25:34,287 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:25:34,794 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:25:34,795 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:25:34,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:25:34 BoogieIcfgContainer [2024-01-27 15:25:34,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:25:34,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:25:34,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:25:34,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:25:34,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:25:33" (1/3) ... [2024-01-27 15:25:34,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cba2d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:25:34, skipping insertion in model container [2024-01-27 15:25:34,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:25:33" (2/3) ... [2024-01-27 15:25:34,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cba2d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:25:34, skipping insertion in model container [2024-01-27 15:25:34,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:25:34" (3/3) ... [2024-01-27 15:25:34,803 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-01-27 15:25:34,811 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:25:34,818 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:25:34,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:25:34,818 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:25:34,881 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:25:34,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 84 flow [2024-01-27 15:25:34,946 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2024-01-27 15:25:34,947 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:25:34,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 8/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-01-27 15:25:34,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 84 flow [2024-01-27 15:25:34,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 32 transitions, 76 flow [2024-01-27 15:25:34,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:25:34,974 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@904ec8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:25:34,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:25:34,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:25:34,988 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2024-01-27 15:25:34,988 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:25:34,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:34,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:34,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:34,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash -704617220, now seen corresponding path program 1 times [2024-01-27 15:25:34,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:35,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282336820] [2024-01-27 15:25:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:35,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:35,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282336820] [2024-01-27 15:25:35,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282336820] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:25:35,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:25:35,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:25:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256089352] [2024-01-27 15:25:35,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:25:35,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:25:35,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:35,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:25:35,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:25:35,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:35,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:35,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:35,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:35,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:35,519 INFO L124 PetriNetUnfolderBase]: 163/281 cut-off events. [2024-01-27 15:25:35,519 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 15:25:35,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 281 events. 163/281 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 912 event pairs, 105 based on Foata normal form. 28/250 useless extension candidates. Maximal degree in co-relation 486. Up to 265 conditions per place. [2024-01-27 15:25:35,524 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-01-27 15:25:35,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 134 flow [2024-01-27 15:25:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:25:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:25:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-01-27 15:25:35,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-01-27 15:25:35,534 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 76 flow. Second operand 3 states and 48 transitions. [2024-01-27 15:25:35,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 134 flow [2024-01-27 15:25:35,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:25:35,538 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 86 flow [2024-01-27 15:25:35,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-01-27 15:25:35,542 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-01-27 15:25:35,542 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 86 flow [2024-01-27 15:25:35,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:35,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:35,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:35,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:25:35,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:35,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1658001116, now seen corresponding path program 1 times [2024-01-27 15:25:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:35,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984864667] [2024-01-27 15:25:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:35,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:25:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984864667] [2024-01-27 15:25:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984864667] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364219132] [2024-01-27 15:25:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:35,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:35,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:35,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:25:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:35,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:25:35,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:25:35,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:25:35,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364219132] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:35,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:35,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-01-27 15:25:35,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118407652] [2024-01-27 15:25:35,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:35,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:25:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:25:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:25:35,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:35,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:35,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:35,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:35,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:36,019 INFO L124 PetriNetUnfolderBase]: 163/287 cut-off events. [2024-01-27 15:25:36,019 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:25:36,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 287 events. 163/287 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 913 event pairs, 105 based on Foata normal form. 3/232 useless extension candidates. Maximal degree in co-relation 555. Up to 265 conditions per place. [2024-01-27 15:25:36,021 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2024-01-27 15:25:36,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 180 flow [2024-01-27 15:25:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:25:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:25:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-01-27 15:25:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380952380952381 [2024-01-27 15:25:36,023 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 86 flow. Second operand 6 states and 71 transitions. [2024-01-27 15:25:36,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 180 flow [2024-01-27 15:25:36,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:25:36,024 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 148 flow [2024-01-27 15:25:36,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2024-01-27 15:25:36,024 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-01-27 15:25:36,025 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 148 flow [2024-01-27 15:25:36,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:36,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:36,025 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:36,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:36,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:36,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:36,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2039820346, now seen corresponding path program 2 times [2024-01-27 15:25:36,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:36,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419704841] [2024-01-27 15:25:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:25:36,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419704841] [2024-01-27 15:25:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419704841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671077000] [2024-01-27 15:25:36,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:25:36,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:36,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:36,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:25:36,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:25:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:36,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:25:36,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:25:37,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:25:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671077000] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:25:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:25:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-27 15:25:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780486053] [2024-01-27 15:25:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:25:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:25:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:25:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:25:37,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:37,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:37,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:37,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:37,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:37,213 INFO L124 PetriNetUnfolderBase]: 207/383 cut-off events. [2024-01-27 15:25:37,213 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:25:37,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 383 events. 207/383 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1463 event pairs, 105 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 743. Up to 259 conditions per place. [2024-01-27 15:25:37,215 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 1 changer transitions 10/58 dead transitions. [2024-01-27 15:25:37,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 303 flow [2024-01-27 15:25:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:25:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:25:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-01-27 15:25:37,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-01-27 15:25:37,216 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 148 flow. Second operand 4 states and 69 transitions. [2024-01-27 15:25:37,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 303 flow [2024-01-27 15:25:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 287 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:25:37,218 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 141 flow [2024-01-27 15:25:37,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-01-27 15:25:37,218 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-01-27 15:25:37,219 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 141 flow [2024-01-27 15:25:37,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:37,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:37,219 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:37,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:37,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-27 15:25:37,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:37,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash -685775356, now seen corresponding path program 3 times [2024-01-27 15:25:37,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293897578] [2024-01-27 15:25:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:25:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293897578] [2024-01-27 15:25:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293897578] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000792575] [2024-01-27 15:25:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:25:37,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:37,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:37,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:25:37,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:25:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:37,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:25:37,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:25:37,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:25:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000792575] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:25:37,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:25:37,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-27 15:25:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479026085] [2024-01-27 15:25:37,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:25:37,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:25:37,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:25:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:25:37,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:37,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:37,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:37,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:37,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:38,068 INFO L124 PetriNetUnfolderBase]: 227/434 cut-off events. [2024-01-27 15:25:38,068 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-01-27 15:25:38,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 434 events. 227/434 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1688 event pairs, 145 based on Foata normal form. 5/381 useless extension candidates. Maximal degree in co-relation 927. Up to 333 conditions per place. [2024-01-27 15:25:38,079 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 1 changer transitions 8/56 dead transitions. [2024-01-27 15:25:38,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 292 flow [2024-01-27 15:25:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:25:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:25:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-01-27 15:25:38,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-01-27 15:25:38,081 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 141 flow. Second operand 4 states and 67 transitions. [2024-01-27 15:25:38,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 292 flow [2024-01-27 15:25:38,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:25:38,082 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 147 flow [2024-01-27 15:25:38,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-01-27 15:25:38,083 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-01-27 15:25:38,083 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 147 flow [2024-01-27 15:25:38,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:38,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:38,084 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:38,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:38,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:38,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash -474829898, now seen corresponding path program 1 times [2024-01-27 15:25:38,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:38,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069466918] [2024-01-27 15:25:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:25:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069466918] [2024-01-27 15:25:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069466918] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:25:38,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:25:38,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:25:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369828866] [2024-01-27 15:25:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:25:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:25:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:25:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:25:38,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:38,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:38,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:38,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:38,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:38,447 INFO L124 PetriNetUnfolderBase]: 157/307 cut-off events. [2024-01-27 15:25:38,447 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-01-27 15:25:38,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 307 events. 157/307 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1014 event pairs, 61 based on Foata normal form. 18/296 useless extension candidates. Maximal degree in co-relation 677. Up to 212 conditions per place. [2024-01-27 15:25:38,449 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 38 selfloop transitions, 2 changer transitions 6/49 dead transitions. [2024-01-27 15:25:38,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 267 flow [2024-01-27 15:25:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:25:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:25:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-27 15:25:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 15:25:38,450 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 147 flow. Second operand 3 states and 55 transitions. [2024-01-27 15:25:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 267 flow [2024-01-27 15:25:38,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 264 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 15:25:38,452 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 150 flow [2024-01-27 15:25:38,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-01-27 15:25:38,453 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-01-27 15:25:38,453 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 150 flow [2024-01-27 15:25:38,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:38,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:38,453 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:38,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:25:38,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:38,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash -595105902, now seen corresponding path program 1 times [2024-01-27 15:25:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:38,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594224584] [2024-01-27 15:25:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:25:38,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594224584] [2024-01-27 15:25:38,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594224584] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:38,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657678499] [2024-01-27 15:25:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:38,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:38,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:38,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:25:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:38,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:25:38,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:25:38,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:25:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657678499] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:38,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:38,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:25:38,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241468536] [2024-01-27 15:25:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:25:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:25:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:25:38,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:38,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:38,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:38,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:38,845 INFO L124 PetriNetUnfolderBase]: 135/259 cut-off events. [2024-01-27 15:25:38,846 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-01-27 15:25:38,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 259 events. 135/259 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 97 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 554. Up to 237 conditions per place. [2024-01-27 15:25:38,847 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 12 changer transitions 0/40 dead transitions. [2024-01-27 15:25:38,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 236 flow [2024-01-27 15:25:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:25:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:25:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-01-27 15:25:38,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2938775510204082 [2024-01-27 15:25:38,848 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 150 flow. Second operand 7 states and 72 transitions. [2024-01-27 15:25:38,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 236 flow [2024-01-27 15:25:38,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 228 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:25:38,850 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 188 flow [2024-01-27 15:25:38,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-01-27 15:25:38,851 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2024-01-27 15:25:38,851 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 188 flow [2024-01-27 15:25:38,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:38,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:38,851 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:38,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:39,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:39,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:39,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:39,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1689468220, now seen corresponding path program 2 times [2024-01-27 15:25:39,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:39,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855332966] [2024-01-27 15:25:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:39,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855332966] [2024-01-27 15:25:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855332966] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:25:39,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:25:39,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:25:39,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295301220] [2024-01-27 15:25:39,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:25:39,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:25:39,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:25:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:25:39,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:39,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:39,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:39,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:39,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:39,242 INFO L124 PetriNetUnfolderBase]: 175/332 cut-off events. [2024-01-27 15:25:39,242 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-27 15:25:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 332 events. 175/332 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1094 event pairs, 97 based on Foata normal form. 14/299 useless extension candidates. Maximal degree in co-relation 679. Up to 247 conditions per place. [2024-01-27 15:25:39,244 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 44 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2024-01-27 15:25:39,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 309 flow [2024-01-27 15:25:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:25:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:25:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-01-27 15:25:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-01-27 15:25:39,245 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 188 flow. Second operand 3 states and 52 transitions. [2024-01-27 15:25:39,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 309 flow [2024-01-27 15:25:39,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 285 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-27 15:25:39,247 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 179 flow [2024-01-27 15:25:39,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-01-27 15:25:39,247 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-01-27 15:25:39,248 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 179 flow [2024-01-27 15:25:39,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:39,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:39,248 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:39,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:25:39,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:39,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1165883678, now seen corresponding path program 1 times [2024-01-27 15:25:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:39,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509465423] [2024-01-27 15:25:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-01-27 15:25:39,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:39,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509465423] [2024-01-27 15:25:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509465423] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:25:39,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:25:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:25:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938376578] [2024-01-27 15:25:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:25:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:25:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:25:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:25:39,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:39,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:39,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:39,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:39,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:39,458 INFO L124 PetriNetUnfolderBase]: 227/437 cut-off events. [2024-01-27 15:25:39,459 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-01-27 15:25:39,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 437 events. 227/437 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1679 event pairs, 133 based on Foata normal form. 18/415 useless extension candidates. Maximal degree in co-relation 966. Up to 315 conditions per place. [2024-01-27 15:25:39,461 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 46 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-01-27 15:25:39,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 316 flow [2024-01-27 15:25:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:25:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:25:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-01-27 15:25:39,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-01-27 15:25:39,462 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 179 flow. Second operand 3 states and 52 transitions. [2024-01-27 15:25:39,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 316 flow [2024-01-27 15:25:39,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:25:39,463 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 191 flow [2024-01-27 15:25:39,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-01-27 15:25:39,464 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-01-27 15:25:39,464 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 191 flow [2024-01-27 15:25:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:39,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:39,464 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:25:39,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:39,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -79656149, now seen corresponding path program 1 times [2024-01-27 15:25:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:39,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320127052] [2024-01-27 15:25:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:43,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:43,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320127052] [2024-01-27 15:25:43,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320127052] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:43,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494727520] [2024-01-27 15:25:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:43,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:43,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:25:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:43,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:25:43,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:44,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:25:44,796 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 322 treesize of output 270 [2024-01-27 15:25:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:45,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:47,549 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:25:47,549 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 373 treesize of output 344 [2024-01-27 15:25:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:48,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494727520] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:48,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:48,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-01-27 15:25:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427342647] [2024-01-27 15:25:48,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:48,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:25:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:25:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:25:48,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:48,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 191 flow. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:48,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:48,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:48,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:51,045 INFO L124 PetriNetUnfolderBase]: 483/924 cut-off events. [2024-01-27 15:25:51,046 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2024-01-27 15:25:51,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 924 events. 483/924 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4583 event pairs, 77 based on Foata normal form. 2/924 useless extension candidates. Maximal degree in co-relation 2181. Up to 178 conditions per place. [2024-01-27 15:25:51,051 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 99 selfloop transitions, 32 changer transitions 21/155 dead transitions. [2024-01-27 15:25:51,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 155 transitions, 832 flow [2024-01-27 15:25:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:25:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:25:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 228 transitions. [2024-01-27 15:25:51,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-01-27 15:25:51,053 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 191 flow. Second operand 18 states and 228 transitions. [2024-01-27 15:25:51,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 155 transitions, 832 flow [2024-01-27 15:25:51,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 155 transitions, 817 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:25:51,056 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 403 flow [2024-01-27 15:25:51,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=403, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-01-27 15:25:51,057 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-01-27 15:25:51,057 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 403 flow [2024-01-27 15:25:51,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:51,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:51,057 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:51,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:51,270 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:51,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1966457009, now seen corresponding path program 2 times [2024-01-27 15:25:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:51,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731466696] [2024-01-27 15:25:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:54,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:54,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731466696] [2024-01-27 15:25:54,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731466696] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:54,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012168909] [2024-01-27 15:25:54,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:25:54,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:54,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:54,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:54,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:25:54,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:25:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:54,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-27 15:25:54,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:55,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:25:55,528 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 326 treesize of output 274 [2024-01-27 15:25:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:56,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:58,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:25:58,524 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 387 treesize of output 359 [2024-01-27 15:25:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012168909] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:59,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:59,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-01-27 15:25:59,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979896485] [2024-01-27 15:25:59,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:25:59,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:25:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:25:59,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:25:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 403 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:25:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:00,688 INFO L124 PetriNetUnfolderBase]: 683/1346 cut-off events. [2024-01-27 15:26:00,689 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2024-01-27 15:26:00,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3783 conditions, 1346 events. 683/1346 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7463 event pairs, 161 based on Foata normal form. 1/1341 useless extension candidates. Maximal degree in co-relation 3736. Up to 366 conditions per place. [2024-01-27 15:26:00,696 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 101 selfloop transitions, 33 changer transitions 10/147 dead transitions. [2024-01-27 15:26:00,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 147 transitions, 998 flow [2024-01-27 15:26:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:26:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:26:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 177 transitions. [2024-01-27 15:26:00,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36122448979591837 [2024-01-27 15:26:00,701 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 403 flow. Second operand 14 states and 177 transitions. [2024-01-27 15:26:00,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 147 transitions, 998 flow [2024-01-27 15:26:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 147 transitions, 929 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-01-27 15:26:00,710 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 551 flow [2024-01-27 15:26:00,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=551, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-01-27 15:26:00,711 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-01-27 15:26:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 551 flow [2024-01-27 15:26:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:00,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:00,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:00,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash -873289937, now seen corresponding path program 3 times [2024-01-27 15:26:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949147535] [2024-01-27 15:26:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:03,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949147535] [2024-01-27 15:26:03,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949147535] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:03,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829402517] [2024-01-27 15:26:03,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:26:03,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:03,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:03,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:03,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:26:03,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:26:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:03,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 57 conjunts are in the unsatisfiable core [2024-01-27 15:26:03,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:05,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:05,043 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 402 treesize of output 326 [2024-01-27 15:26:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:06,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:08,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:08,577 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 430 treesize of output 402 [2024-01-27 15:26:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829402517] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:10,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:10,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-01-27 15:26:10,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255688284] [2024-01-27 15:26:10,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:10,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:26:10,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:26:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:26:10,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:26:10,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 551 flow. Second operand has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 23 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:10,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:10,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:26:10,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:13,519 INFO L124 PetriNetUnfolderBase]: 1125/2244 cut-off events. [2024-01-27 15:26:13,520 INFO L125 PetriNetUnfolderBase]: For 3810/3810 co-relation queries the response was YES. [2024-01-27 15:26:13,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6391 conditions, 2244 events. 1125/2244 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14317 event pairs, 147 based on Foata normal form. 16/2256 useless extension candidates. Maximal degree in co-relation 6319. Up to 394 conditions per place. [2024-01-27 15:26:13,532 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 170 selfloop transitions, 74 changer transitions 38/285 dead transitions. [2024-01-27 15:26:13,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 285 transitions, 1873 flow [2024-01-27 15:26:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:26:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:26:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 402 transitions. [2024-01-27 15:26:13,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35892857142857143 [2024-01-27 15:26:13,534 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 551 flow. Second operand 32 states and 402 transitions. [2024-01-27 15:26:13,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 285 transitions, 1873 flow [2024-01-27 15:26:13,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 285 transitions, 1846 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-01-27 15:26:13,545 INFO L231 Difference]: Finished difference. Result has 118 places, 121 transitions, 1050 flow [2024-01-27 15:26:13,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1050, PETRI_PLACES=118, PETRI_TRANSITIONS=121} [2024-01-27 15:26:13,546 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 87 predicate places. [2024-01-27 15:26:13,546 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 121 transitions, 1050 flow [2024-01-27 15:26:13,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 23 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:13,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:13,546 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:13,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 15:26:13,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:13,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:13,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1057681005, now seen corresponding path program 4 times [2024-01-27 15:26:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833561492] [2024-01-27 15:26:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:16,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:16,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833561492] [2024-01-27 15:26:16,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833561492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:16,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445122429] [2024-01-27 15:26:16,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:26:16,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:16,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:16,687 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:16,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:26:16,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:26:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:16,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:26:16,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:17,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:17,876 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 333 treesize of output 277 [2024-01-27 15:26:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:18,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:20,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:20,272 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 430 treesize of output 402 [2024-01-27 15:26:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:21,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445122429] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:21,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:21,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2024-01-27 15:26:21,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596905146] [2024-01-27 15:26:21,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:21,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:26:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:26:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:26:21,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:26:21,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 121 transitions, 1050 flow. Second operand has 24 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:21,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:21,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:26:21,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:22,823 INFO L124 PetriNetUnfolderBase]: 1223/2443 cut-off events. [2024-01-27 15:26:22,824 INFO L125 PetriNetUnfolderBase]: For 13085/13085 co-relation queries the response was YES. [2024-01-27 15:26:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8599 conditions, 2443 events. 1223/2443 cut-off events. For 13085/13085 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16242 event pairs, 387 based on Foata normal form. 1/2438 useless extension candidates. Maximal degree in co-relation 8515. Up to 930 conditions per place. [2024-01-27 15:26:22,840 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 150 selfloop transitions, 55 changer transitions 16/224 dead transitions. [2024-01-27 15:26:22,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 224 transitions, 2016 flow [2024-01-27 15:26:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:26:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:26:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 194 transitions. [2024-01-27 15:26:22,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36952380952380953 [2024-01-27 15:26:22,843 INFO L175 Difference]: Start difference. First operand has 118 places, 121 transitions, 1050 flow. Second operand 15 states and 194 transitions. [2024-01-27 15:26:22,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 224 transitions, 2016 flow [2024-01-27 15:26:22,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 224 transitions, 1836 flow, removed 73 selfloop flow, removed 10 redundant places. [2024-01-27 15:26:22,872 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1257 flow [2024-01-27 15:26:22,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1257, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-01-27 15:26:22,874 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-01-27 15:26:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1257 flow [2024-01-27 15:26:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:22,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:22,875 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:22,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:23,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:26:23,087 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:23,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1579390353, now seen corresponding path program 5 times [2024-01-27 15:26:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:23,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857680197] [2024-01-27 15:26:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:25,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:25,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857680197] [2024-01-27 15:26:25,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857680197] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:25,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135536180] [2024-01-27 15:26:25,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:26:25,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:25,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:25,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:25,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:26:25,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:26:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:25,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:26:25,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:27,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:27,047 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 367 treesize of output 299 [2024-01-27 15:26:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:27,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:29,679 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:26:29,680 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 373 treesize of output 344 [2024-01-27 15:26:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:30,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135536180] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:30,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:30,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-01-27 15:26:30,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54441211] [2024-01-27 15:26:30,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:26:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:26:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:26:30,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:26:30,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1257 flow. Second operand has 24 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:30,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:30,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:26:30,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:33,131 INFO L124 PetriNetUnfolderBase]: 1523/3051 cut-off events. [2024-01-27 15:26:33,131 INFO L125 PetriNetUnfolderBase]: For 22092/22092 co-relation queries the response was YES. [2024-01-27 15:26:33,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11164 conditions, 3051 events. 1523/3051 cut-off events. For 22092/22092 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21351 event pairs, 399 based on Foata normal form. 2/3047 useless extension candidates. Maximal degree in co-relation 11078. Up to 664 conditions per place. [2024-01-27 15:26:33,152 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 148 selfloop transitions, 68 changer transitions 24/243 dead transitions. [2024-01-27 15:26:33,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 243 transitions, 2347 flow [2024-01-27 15:26:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:26:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:26:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 200 transitions. [2024-01-27 15:26:33,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-01-27 15:26:33,154 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1257 flow. Second operand 16 states and 200 transitions. [2024-01-27 15:26:33,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 243 transitions, 2347 flow [2024-01-27 15:26:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 243 transitions, 2257 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-01-27 15:26:33,199 INFO L231 Difference]: Finished difference. Result has 144 places, 158 transitions, 1653 flow [2024-01-27 15:26:33,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1653, PETRI_PLACES=144, PETRI_TRANSITIONS=158} [2024-01-27 15:26:33,200 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 113 predicate places. [2024-01-27 15:26:33,200 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 158 transitions, 1653 flow [2024-01-27 15:26:33,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:33,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:33,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:33,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:33,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:26:33,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:33,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 971461573, now seen corresponding path program 6 times [2024-01-27 15:26:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:33,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823929721] [2024-01-27 15:26:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:33,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:35,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:35,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823929721] [2024-01-27 15:26:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823929721] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:35,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611757487] [2024-01-27 15:26:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:26:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:35,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:35,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:26:36,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:26:36,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:36,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-27 15:26:36,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:37,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:37,224 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 315 treesize of output 263 [2024-01-27 15:26:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:37,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:39,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:39,594 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 417 treesize of output 395 [2024-01-27 15:26:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611757487] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:40,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-01-27 15:26:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429718322] [2024-01-27 15:26:40,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:26:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:26:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:26:40,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:26:40,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 1653 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:40,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:40,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:26:40,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:43,603 INFO L124 PetriNetUnfolderBase]: 1749/3540 cut-off events. [2024-01-27 15:26:43,604 INFO L125 PetriNetUnfolderBase]: For 30357/30357 co-relation queries the response was YES. [2024-01-27 15:26:43,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13598 conditions, 3540 events. 1749/3540 cut-off events. For 30357/30357 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25688 event pairs, 459 based on Foata normal form. 4/3518 useless extension candidates. Maximal degree in co-relation 13505. Up to 1078 conditions per place. [2024-01-27 15:26:43,628 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 194 selfloop transitions, 83 changer transitions 42/322 dead transitions. [2024-01-27 15:26:43,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 322 transitions, 3210 flow [2024-01-27 15:26:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:26:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:26:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 313 transitions. [2024-01-27 15:26:43,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3726190476190476 [2024-01-27 15:26:43,631 INFO L175 Difference]: Start difference. First operand has 144 places, 158 transitions, 1653 flow. Second operand 24 states and 313 transitions. [2024-01-27 15:26:43,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 322 transitions, 3210 flow [2024-01-27 15:26:43,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 322 transitions, 2979 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-01-27 15:26:43,731 INFO L231 Difference]: Finished difference. Result has 172 places, 176 transitions, 1982 flow [2024-01-27 15:26:43,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1982, PETRI_PLACES=172, PETRI_TRANSITIONS=176} [2024-01-27 15:26:43,732 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-01-27 15:26:43,732 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 176 transitions, 1982 flow [2024-01-27 15:26:43,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:43,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:43,733 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:43,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:43,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:26:43,938 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:43,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1665153019, now seen corresponding path program 7 times [2024-01-27 15:26:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:43,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907086960] [2024-01-27 15:26:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907086960] [2024-01-27 15:26:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907086960] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240711932] [2024-01-27 15:26:46,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:26:46,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:46,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:46,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:26:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:46,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:26:46,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:47,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:47,762 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 326 treesize of output 278 [2024-01-27 15:26:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:48,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:50,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:50,907 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 392 treesize of output 358 [2024-01-27 15:26:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:51,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240711932] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:51,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:51,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-01-27 15:26:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005709829] [2024-01-27 15:26:51,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:26:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:26:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:26:51,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:26:51,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 176 transitions, 1982 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:51,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:51,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:26:51,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:53,561 INFO L124 PetriNetUnfolderBase]: 1743/3523 cut-off events. [2024-01-27 15:26:53,561 INFO L125 PetriNetUnfolderBase]: For 23808/23808 co-relation queries the response was YES. [2024-01-27 15:26:53,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13387 conditions, 3523 events. 1743/3523 cut-off events. For 23808/23808 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25566 event pairs, 513 based on Foata normal form. 1/3498 useless extension candidates. Maximal degree in co-relation 13284. Up to 1242 conditions per place. [2024-01-27 15:26:53,585 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 149 selfloop transitions, 77 changer transitions 20/249 dead transitions. [2024-01-27 15:26:53,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 249 transitions, 2886 flow [2024-01-27 15:26:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:26:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:26:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 182 transitions. [2024-01-27 15:26:53,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2024-01-27 15:26:53,606 INFO L175 Difference]: Start difference. First operand has 172 places, 176 transitions, 1982 flow. Second operand 15 states and 182 transitions. [2024-01-27 15:26:53,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 249 transitions, 2886 flow [2024-01-27 15:26:53,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 249 transitions, 2721 flow, removed 52 selfloop flow, removed 12 redundant places. [2024-01-27 15:26:53,677 INFO L231 Difference]: Finished difference. Result has 172 places, 181 transitions, 2096 flow [2024-01-27 15:26:53,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2096, PETRI_PLACES=172, PETRI_TRANSITIONS=181} [2024-01-27 15:26:53,677 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-01-27 15:26:53,677 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 181 transitions, 2096 flow [2024-01-27 15:26:53,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:53,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:53,678 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:53,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:26:53,890 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:53,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1738974457, now seen corresponding path program 8 times [2024-01-27 15:26:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110225621] [2024-01-27 15:26:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:55,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110225621] [2024-01-27 15:26:55,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110225621] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686593032] [2024-01-27 15:26:55,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:26:55,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:55,249 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:55,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:26:55,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:26:55,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:55,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:26:55,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:55,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:55,870 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 161 treesize of output 133 [2024-01-27 15:26:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:55,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:56,476 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:26:56,476 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 75 [2024-01-27 15:26:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686593032] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:56,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:56,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:26:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257168815] [2024-01-27 15:26:56,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:56,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:26:56,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:26:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:26:56,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:26:56,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 181 transitions, 2096 flow. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 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) [2024-01-27 15:26:56,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:56,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:26:56,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:57,731 INFO L124 PetriNetUnfolderBase]: 1805/3662 cut-off events. [2024-01-27 15:26:57,731 INFO L125 PetriNetUnfolderBase]: For 25601/25601 co-relation queries the response was YES. [2024-01-27 15:26:57,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 3662 events. 1805/3662 cut-off events. For 25601/25601 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26981 event pairs, 365 based on Foata normal form. 16/3678 useless extension candidates. Maximal degree in co-relation 13875. Up to 995 conditions per place. [2024-01-27 15:26:57,753 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 167 selfloop transitions, 96 changer transitions 12/278 dead transitions. [2024-01-27 15:26:57,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 278 transitions, 3370 flow [2024-01-27 15:26:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:26:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:26:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 213 transitions. [2024-01-27 15:26:57,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35798319327731093 [2024-01-27 15:26:57,755 INFO L175 Difference]: Start difference. First operand has 172 places, 181 transitions, 2096 flow. Second operand 17 states and 213 transitions. [2024-01-27 15:26:57,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 278 transitions, 3370 flow [2024-01-27 15:26:57,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 278 transitions, 3305 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-01-27 15:26:57,825 INFO L231 Difference]: Finished difference. Result has 182 places, 190 transitions, 2388 flow [2024-01-27 15:26:57,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2388, PETRI_PLACES=182, PETRI_TRANSITIONS=190} [2024-01-27 15:26:57,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 151 predicate places. [2024-01-27 15:26:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 190 transitions, 2388 flow [2024-01-27 15:26:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 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) [2024-01-27 15:26:57,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:57,826 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:57,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:26:58,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:58,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1384741341, now seen corresponding path program 9 times [2024-01-27 15:26:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:58,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872125885] [2024-01-27 15:26:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:59,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872125885] [2024-01-27 15:26:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872125885] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848063545] [2024-01-27 15:26:59,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:26:59,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:59,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:59,267 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:59,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:26:59,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:26:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:59,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:26:59,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:59,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:00,425 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:00,425 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 75 [2024-01-27 15:27:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848063545] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:00,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:00,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:27:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967521071] [2024-01-27 15:27:00,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:27:00,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:27:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:27:00,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:00,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 190 transitions, 2388 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:00,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:00,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:01,725 INFO L124 PetriNetUnfolderBase]: 1913/3872 cut-off events. [2024-01-27 15:27:01,725 INFO L125 PetriNetUnfolderBase]: For 31188/31188 co-relation queries the response was YES. [2024-01-27 15:27:01,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15471 conditions, 3872 events. 1913/3872 cut-off events. For 31188/31188 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28885 event pairs, 423 based on Foata normal form. 16/3888 useless extension candidates. Maximal degree in co-relation 15368. Up to 1763 conditions per place. [2024-01-27 15:27:01,754 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 169 selfloop transitions, 80 changer transitions 11/263 dead transitions. [2024-01-27 15:27:01,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 263 transitions, 3479 flow [2024-01-27 15:27:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:27:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:27:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 177 transitions. [2024-01-27 15:27:01,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2024-01-27 15:27:01,756 INFO L175 Difference]: Start difference. First operand has 182 places, 190 transitions, 2388 flow. Second operand 15 states and 177 transitions. [2024-01-27 15:27:01,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 263 transitions, 3479 flow [2024-01-27 15:27:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 263 transitions, 3371 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-01-27 15:27:01,847 INFO L231 Difference]: Finished difference. Result has 194 places, 201 transitions, 2675 flow [2024-01-27 15:27:01,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2675, PETRI_PLACES=194, PETRI_TRANSITIONS=201} [2024-01-27 15:27:01,848 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 163 predicate places. [2024-01-27 15:27:01,848 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 201 transitions, 2675 flow [2024-01-27 15:27:01,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:01,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:01,848 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:01,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-27 15:27:02,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:27:02,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:02,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1905067541, now seen corresponding path program 10 times [2024-01-27 15:27:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:02,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144740154] [2024-01-27 15:27:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:03,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144740154] [2024-01-27 15:27:03,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144740154] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:03,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063614656] [2024-01-27 15:27:03,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:27:03,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:03,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:03,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:03,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:27:03,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:27:03,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:03,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:27:03,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:03,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:03,945 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 157 treesize of output 141 [2024-01-27 15:27:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:04,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:04,733 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:04,734 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 75 [2024-01-27 15:27:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:04,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063614656] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:04,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-01-27 15:27:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025875533] [2024-01-27 15:27:04,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:04,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:04,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 201 transitions, 2675 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:27:04,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:04,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:04,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:06,174 INFO L124 PetriNetUnfolderBase]: 2061/4169 cut-off events. [2024-01-27 15:27:06,174 INFO L125 PetriNetUnfolderBase]: For 35409/35409 co-relation queries the response was YES. [2024-01-27 15:27:06,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17103 conditions, 4169 events. 2061/4169 cut-off events. For 35409/35409 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31600 event pairs, 379 based on Foata normal form. 10/4179 useless extension candidates. Maximal degree in co-relation 16998. Up to 1664 conditions per place. [2024-01-27 15:27:06,209 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 170 selfloop transitions, 101 changer transitions 16/290 dead transitions. [2024-01-27 15:27:06,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 290 transitions, 3958 flow [2024-01-27 15:27:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:27:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:27:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2024-01-27 15:27:06,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-01-27 15:27:06,211 INFO L175 Difference]: Start difference. First operand has 194 places, 201 transitions, 2675 flow. Second operand 16 states and 196 transitions. [2024-01-27 15:27:06,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 290 transitions, 3958 flow [2024-01-27 15:27:06,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 290 transitions, 3869 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-01-27 15:27:06,318 INFO L231 Difference]: Finished difference. Result has 207 places, 215 transitions, 3090 flow [2024-01-27 15:27:06,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3090, PETRI_PLACES=207, PETRI_TRANSITIONS=215} [2024-01-27 15:27:06,319 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2024-01-27 15:27:06,319 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 215 transitions, 3090 flow [2024-01-27 15:27:06,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:27:06,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:06,320 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:06,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:06,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:06,533 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:06,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash 208924117, now seen corresponding path program 11 times [2024-01-27 15:27:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:06,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057059688] [2024-01-27 15:27:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:07,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057059688] [2024-01-27 15:27:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057059688] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557528142] [2024-01-27 15:27:07,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:27:07,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:07,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:07,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:27:08,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:27:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:08,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:27:08,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:08,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:08,421 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 157 treesize of output 141 [2024-01-27 15:27:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:08,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:09,241 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:09,242 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 75 [2024-01-27 15:27:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:09,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557528142] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:09,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:09,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:27:09,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206661236] [2024-01-27 15:27:09,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:09,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:09,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:09,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 215 transitions, 3090 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:27:09,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:09,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:09,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:10,584 INFO L124 PetriNetUnfolderBase]: 2099/4279 cut-off events. [2024-01-27 15:27:10,585 INFO L125 PetriNetUnfolderBase]: For 38395/38395 co-relation queries the response was YES. [2024-01-27 15:27:10,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18254 conditions, 4279 events. 2099/4279 cut-off events. For 38395/38395 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32503 event pairs, 387 based on Foata normal form. 4/4283 useless extension candidates. Maximal degree in co-relation 18145. Up to 1400 conditions per place. [2024-01-27 15:27:10,628 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 184 selfloop transitions, 86 changer transitions 15/288 dead transitions. [2024-01-27 15:27:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 288 transitions, 4204 flow [2024-01-27 15:27:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:27:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:27:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 179 transitions. [2024-01-27 15:27:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34095238095238095 [2024-01-27 15:27:10,629 INFO L175 Difference]: Start difference. First operand has 207 places, 215 transitions, 3090 flow. Second operand 15 states and 179 transitions. [2024-01-27 15:27:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 288 transitions, 4204 flow [2024-01-27 15:27:10,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 288 transitions, 4067 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-01-27 15:27:10,753 INFO L231 Difference]: Finished difference. Result has 213 places, 219 transitions, 3289 flow [2024-01-27 15:27:10,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3289, PETRI_PLACES=213, PETRI_TRANSITIONS=219} [2024-01-27 15:27:10,754 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2024-01-27 15:27:10,754 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 219 transitions, 3289 flow [2024-01-27 15:27:10,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:27:10,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:10,754 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:10,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:27:10,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:10,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:10,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2084599603, now seen corresponding path program 12 times [2024-01-27 15:27:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:10,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315381097] [2024-01-27 15:27:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:12,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315381097] [2024-01-27 15:27:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315381097] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437282050] [2024-01-27 15:27:12,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:27:12,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:12,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:12,319 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:12,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:27:12,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:27:12,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:12,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:27:12,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:12,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:12,973 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 161 treesize of output 133 [2024-01-27 15:27:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:13,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:13,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:13,570 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 51 treesize of output 95 [2024-01-27 15:27:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437282050] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:13,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:13,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:27:13,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486639758] [2024-01-27 15:27:13,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:13,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:27:13,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:27:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:27:13,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:13,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 219 transitions, 3289 flow. Second operand has 19 states, 19 states have (on average 8.210526315789474) internal successors, (156), 19 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) [2024-01-27 15:27:13,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:13,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:14,868 INFO L124 PetriNetUnfolderBase]: 2095/4251 cut-off events. [2024-01-27 15:27:14,869 INFO L125 PetriNetUnfolderBase]: For 45772/45772 co-relation queries the response was YES. [2024-01-27 15:27:14,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18287 conditions, 4251 events. 2095/4251 cut-off events. For 45772/45772 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32486 event pairs, 507 based on Foata normal form. 32/4273 useless extension candidates. Maximal degree in co-relation 18177. Up to 1138 conditions per place. [2024-01-27 15:27:14,898 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 164 selfloop transitions, 106 changer transitions 13/286 dead transitions. [2024-01-27 15:27:14,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 4251 flow [2024-01-27 15:27:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:27:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:27:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2024-01-27 15:27:14,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-01-27 15:27:14,899 INFO L175 Difference]: Start difference. First operand has 213 places, 219 transitions, 3289 flow. Second operand 16 states and 192 transitions. [2024-01-27 15:27:14,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 4251 flow [2024-01-27 15:27:15,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 286 transitions, 4128 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-01-27 15:27:15,018 INFO L231 Difference]: Finished difference. Result has 221 places, 221 transitions, 3493 flow [2024-01-27 15:27:15,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3493, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2024-01-27 15:27:15,019 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 190 predicate places. [2024-01-27 15:27:15,019 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 3493 flow [2024-01-27 15:27:15,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.210526315789474) internal successors, (156), 19 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) [2024-01-27 15:27:15,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:15,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:15,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:15,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:15,232 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:15,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -912162553, now seen corresponding path program 13 times [2024-01-27 15:27:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969774467] [2024-01-27 15:27:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:16,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:16,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969774467] [2024-01-27 15:27:16,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969774467] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:16,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631269590] [2024-01-27 15:27:16,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:27:16,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:16,411 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:16,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:27:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:16,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:27:16,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:17,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:17,078 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 124 treesize of output 112 [2024-01-27 15:27:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:17,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:17,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:17,615 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 168 treesize of output 194 [2024-01-27 15:27:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631269590] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:17,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:17,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:27:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745132507] [2024-01-27 15:27:17,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:17,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:27:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:27:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:27:17,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:17,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 3493 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:17,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:17,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:17,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:19,409 INFO L124 PetriNetUnfolderBase]: 2159/4398 cut-off events. [2024-01-27 15:27:19,410 INFO L125 PetriNetUnfolderBase]: For 48205/48205 co-relation queries the response was YES. [2024-01-27 15:27:19,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19390 conditions, 4398 events. 2159/4398 cut-off events. For 48205/48205 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33883 event pairs, 481 based on Foata normal form. 10/4396 useless extension candidates. Maximal degree in co-relation 19278. Up to 1122 conditions per place. [2024-01-27 15:27:19,440 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 167 selfloop transitions, 123 changer transitions 16/309 dead transitions. [2024-01-27 15:27:19,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 309 transitions, 4740 flow [2024-01-27 15:27:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:27:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:27:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 219 transitions. [2024-01-27 15:27:19,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680672268907563 [2024-01-27 15:27:19,442 INFO L175 Difference]: Start difference. First operand has 221 places, 221 transitions, 3493 flow. Second operand 17 states and 219 transitions. [2024-01-27 15:27:19,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 309 transitions, 4740 flow [2024-01-27 15:27:19,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 309 transitions, 4618 flow, removed 32 selfloop flow, removed 12 redundant places. [2024-01-27 15:27:19,564 INFO L231 Difference]: Finished difference. Result has 228 places, 225 transitions, 3807 flow [2024-01-27 15:27:19,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3807, PETRI_PLACES=228, PETRI_TRANSITIONS=225} [2024-01-27 15:27:19,565 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2024-01-27 15:27:19,565 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 225 transitions, 3807 flow [2024-01-27 15:27:19,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:19,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:19,565 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:19,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:19,778 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:19,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2135426189, now seen corresponding path program 14 times [2024-01-27 15:27:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262512749] [2024-01-27 15:27:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262512749] [2024-01-27 15:27:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262512749] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207636626] [2024-01-27 15:27:21,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:27:21,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:21,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:21,110 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:21,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:27:21,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:27:21,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:21,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-27 15:27:21,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:21,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:21,956 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 184 treesize of output 156 [2024-01-27 15:27:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:22,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:22,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:22,690 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 168 treesize of output 194 [2024-01-27 15:27:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207636626] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:23,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:23,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-27 15:27:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903491174] [2024-01-27 15:27:23,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:23,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:23,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:23,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 225 transitions, 3807 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 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) [2024-01-27 15:27:23,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:23,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:23,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:24,259 INFO L124 PetriNetUnfolderBase]: 2151/4353 cut-off events. [2024-01-27 15:27:24,260 INFO L125 PetriNetUnfolderBase]: For 49880/49880 co-relation queries the response was YES. [2024-01-27 15:27:24,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19942 conditions, 4353 events. 2151/4353 cut-off events. For 49880/49880 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33612 event pairs, 701 based on Foata normal form. 18/4359 useless extension candidates. Maximal degree in co-relation 19831. Up to 1990 conditions per place. [2024-01-27 15:27:24,289 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 174 selfloop transitions, 84 changer transitions 21/282 dead transitions. [2024-01-27 15:27:24,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 282 transitions, 4696 flow [2024-01-27 15:27:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:27:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:27:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-01-27 15:27:24,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367032967032967 [2024-01-27 15:27:24,290 INFO L175 Difference]: Start difference. First operand has 228 places, 225 transitions, 3807 flow. Second operand 13 states and 167 transitions. [2024-01-27 15:27:24,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 282 transitions, 4696 flow [2024-01-27 15:27:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 282 transitions, 4543 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-01-27 15:27:24,424 INFO L231 Difference]: Finished difference. Result has 231 places, 223 transitions, 3792 flow [2024-01-27 15:27:24,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3792, PETRI_PLACES=231, PETRI_TRANSITIONS=223} [2024-01-27 15:27:24,425 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2024-01-27 15:27:24,425 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 223 transitions, 3792 flow [2024-01-27 15:27:24,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 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) [2024-01-27 15:27:24,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:24,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:24,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:24,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:24,638 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:24,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1594216883, now seen corresponding path program 15 times [2024-01-27 15:27:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:24,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666224664] [2024-01-27 15:27:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:25,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666224664] [2024-01-27 15:27:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666224664] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046619361] [2024-01-27 15:27:25,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:27:25,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:25,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:25,970 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:25,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:27:26,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:27:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:26,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:27:26,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:26,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:26,842 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 92 treesize of output 84 [2024-01-27 15:27:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:26,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:27,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:27,311 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 168 treesize of output 194 [2024-01-27 15:27:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:27,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046619361] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:27,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:27,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:27:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932321223] [2024-01-27 15:27:27,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:27:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:27:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:27:27,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:27,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 223 transitions, 3792 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:27,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:27,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:27,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:28,877 INFO L124 PetriNetUnfolderBase]: 2089/4240 cut-off events. [2024-01-27 15:27:28,878 INFO L125 PetriNetUnfolderBase]: For 47435/47435 co-relation queries the response was YES. [2024-01-27 15:27:28,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19460 conditions, 4240 events. 2089/4240 cut-off events. For 47435/47435 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32357 event pairs, 585 based on Foata normal form. 4/4230 useless extension candidates. Maximal degree in co-relation 19348. Up to 2196 conditions per place. [2024-01-27 15:27:28,915 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 152 selfloop transitions, 94 changer transitions 18/267 dead transitions. [2024-01-27 15:27:28,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 267 transitions, 4596 flow [2024-01-27 15:27:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:27:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:27:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2024-01-27 15:27:28,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252747252747253 [2024-01-27 15:27:28,916 INFO L175 Difference]: Start difference. First operand has 231 places, 223 transitions, 3792 flow. Second operand 13 states and 148 transitions. [2024-01-27 15:27:28,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 267 transitions, 4596 flow [2024-01-27 15:27:29,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 267 transitions, 4457 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-27 15:27:29,075 INFO L231 Difference]: Finished difference. Result has 232 places, 225 transitions, 4012 flow [2024-01-27 15:27:29,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4012, PETRI_PLACES=232, PETRI_TRANSITIONS=225} [2024-01-27 15:27:29,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2024-01-27 15:27:29,076 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 225 transitions, 4012 flow [2024-01-27 15:27:29,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:29,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:29,077 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:29,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:29,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:29,291 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:29,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1702873816, now seen corresponding path program 16 times [2024-01-27 15:27:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145183103] [2024-01-27 15:27:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:29,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145183103] [2024-01-27 15:27:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145183103] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433935902] [2024-01-27 15:27:30,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:27:30,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:30,611 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:30,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:27:30,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:27:30,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:30,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:27:30,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:31,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:31,488 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 124 treesize of output 112 [2024-01-27 15:27:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:31,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:32,177 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:32,178 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 164 treesize of output 177 [2024-01-27 15:27:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:32,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433935902] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:32,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:32,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-01-27 15:27:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655133966] [2024-01-27 15:27:32,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:32,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:32,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:32,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:32,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 225 transitions, 4012 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:27:32,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:32,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:32,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:34,041 INFO L124 PetriNetUnfolderBase]: 2041/4137 cut-off events. [2024-01-27 15:27:34,041 INFO L125 PetriNetUnfolderBase]: For 52621/52621 co-relation queries the response was YES. [2024-01-27 15:27:34,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19443 conditions, 4137 events. 2041/4137 cut-off events. For 52621/52621 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31383 event pairs, 547 based on Foata normal form. 16/4151 useless extension candidates. Maximal degree in co-relation 19331. Up to 1210 conditions per place. [2024-01-27 15:27:34,073 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 191 selfloop transitions, 96 changer transitions 8/298 dead transitions. [2024-01-27 15:27:34,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 298 transitions, 4933 flow [2024-01-27 15:27:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:27:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:27:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 205 transitions. [2024-01-27 15:27:34,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-01-27 15:27:34,075 INFO L175 Difference]: Start difference. First operand has 232 places, 225 transitions, 4012 flow. Second operand 16 states and 205 transitions. [2024-01-27 15:27:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 298 transitions, 4933 flow [2024-01-27 15:27:34,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 298 transitions, 4768 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-01-27 15:27:34,224 INFO L231 Difference]: Finished difference. Result has 231 places, 221 transitions, 4034 flow [2024-01-27 15:27:34,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3773, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4034, PETRI_PLACES=231, PETRI_TRANSITIONS=221} [2024-01-27 15:27:34,225 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2024-01-27 15:27:34,225 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 221 transitions, 4034 flow [2024-01-27 15:27:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:27:34,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:34,232 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:34,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:34,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:27:34,450 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:34,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:34,450 INFO L85 PathProgramCache]: Analyzing trace with hash -80108516, now seen corresponding path program 17 times [2024-01-27 15:27:34,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:34,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173539580] [2024-01-27 15:27:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:34,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:35,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173539580] [2024-01-27 15:27:35,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173539580] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:35,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536747101] [2024-01-27 15:27:35,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:27:35,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:35,752 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:35,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:27:36,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:27:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:36,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:27:36,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:36,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:36,644 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 162 treesize of output 150 [2024-01-27 15:27:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:36,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:37,404 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:37,404 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 202 treesize of output 209 [2024-01-27 15:27:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:37,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536747101] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:37,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:37,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:27:37,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371782224] [2024-01-27 15:27:37,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:37,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:37,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:37,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:37,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 221 transitions, 4034 flow. Second operand has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:37,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:37,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:37,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:39,171 INFO L124 PetriNetUnfolderBase]: 2059/4183 cut-off events. [2024-01-27 15:27:39,172 INFO L125 PetriNetUnfolderBase]: For 49378/49378 co-relation queries the response was YES. [2024-01-27 15:27:39,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19599 conditions, 4183 events. 2059/4183 cut-off events. For 49378/49378 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32004 event pairs, 673 based on Foata normal form. 6/4187 useless extension candidates. Maximal degree in co-relation 19489. Up to 1210 conditions per place. [2024-01-27 15:27:39,200 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 170 selfloop transitions, 80 changer transitions 16/269 dead transitions. [2024-01-27 15:27:39,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 269 transitions, 4789 flow [2024-01-27 15:27:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:27:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:27:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-01-27 15:27:39,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-01-27 15:27:39,201 INFO L175 Difference]: Start difference. First operand has 231 places, 221 transitions, 4034 flow. Second operand 10 states and 133 transitions. [2024-01-27 15:27:39,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 269 transitions, 4789 flow [2024-01-27 15:27:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 269 transitions, 4689 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-01-27 15:27:39,334 INFO L231 Difference]: Finished difference. Result has 234 places, 220 transitions, 4076 flow [2024-01-27 15:27:39,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4076, PETRI_PLACES=234, PETRI_TRANSITIONS=220} [2024-01-27 15:27:39,335 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2024-01-27 15:27:39,335 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 220 transitions, 4076 flow [2024-01-27 15:27:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:39,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:39,336 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:39,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:39,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:27:39,545 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:39,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash 948729436, now seen corresponding path program 18 times [2024-01-27 15:27:39,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:39,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257246090] [2024-01-27 15:27:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:40,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257246090] [2024-01-27 15:27:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257246090] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696808599] [2024-01-27 15:27:40,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:27:40,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:40,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:40,910 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:40,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:27:41,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:27:41,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:41,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:27:41,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:41,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:41,829 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 124 treesize of output 108 [2024-01-27 15:27:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:42,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:42,446 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:42,447 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 164 treesize of output 177 [2024-01-27 15:27:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:42,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696808599] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:42,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:42,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:27:42,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618132971] [2024-01-27 15:27:42,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:42,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:27:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:27:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:27:42,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:42,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 220 transitions, 4076 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:42,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:42,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:42,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:44,389 INFO L124 PetriNetUnfolderBase]: 2005/4062 cut-off events. [2024-01-27 15:27:44,389 INFO L125 PetriNetUnfolderBase]: For 49837/49837 co-relation queries the response was YES. [2024-01-27 15:27:44,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19319 conditions, 4062 events. 2005/4062 cut-off events. For 49837/49837 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30687 event pairs, 547 based on Foata normal form. 6/4066 useless extension candidates. Maximal degree in co-relation 19207. Up to 1210 conditions per place. [2024-01-27 15:27:44,421 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 186 selfloop transitions, 93 changer transitions 18/300 dead transitions. [2024-01-27 15:27:44,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 300 transitions, 4983 flow [2024-01-27 15:27:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:27:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:27:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 214 transitions. [2024-01-27 15:27:44,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3596638655462185 [2024-01-27 15:27:44,422 INFO L175 Difference]: Start difference. First operand has 234 places, 220 transitions, 4076 flow. Second operand 17 states and 214 transitions. [2024-01-27 15:27:44,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 300 transitions, 4983 flow [2024-01-27 15:27:44,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 300 transitions, 4849 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-01-27 15:27:44,556 INFO L231 Difference]: Finished difference. Result has 241 places, 218 transitions, 4085 flow [2024-01-27 15:27:44,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3923, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4085, PETRI_PLACES=241, PETRI_TRANSITIONS=218} [2024-01-27 15:27:44,556 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2024-01-27 15:27:44,557 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 218 transitions, 4085 flow [2024-01-27 15:27:44,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:44,557 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:44,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:27:44,762 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash 673264860, now seen corresponding path program 19 times [2024-01-27 15:27:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:44,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570934746] [2024-01-27 15:27:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570934746] [2024-01-27 15:27:45,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570934746] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394295850] [2024-01-27 15:27:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:27:45,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:45,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:45,919 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:45,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:27:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:46,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:27:46,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:46,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:46,757 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 92 treesize of output 88 [2024-01-27 15:27:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:46,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:47,276 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:27:47,276 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 164 treesize of output 177 [2024-01-27 15:27:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:47,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394295850] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:47,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:27:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108288287] [2024-01-27 15:27:47,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:47,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:27:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:27:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:27:47,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:47,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 218 transitions, 4085 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:47,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:47,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:47,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:48,959 INFO L124 PetriNetUnfolderBase]: 1935/3914 cut-off events. [2024-01-27 15:27:48,960 INFO L125 PetriNetUnfolderBase]: For 48999/48999 co-relation queries the response was YES. [2024-01-27 15:27:48,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18979 conditions, 3914 events. 1935/3914 cut-off events. For 48999/48999 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29403 event pairs, 599 based on Foata normal form. 12/3924 useless extension candidates. Maximal degree in co-relation 18869. Up to 1210 conditions per place. [2024-01-27 15:27:48,985 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 162 selfloop transitions, 82 changer transitions 22/269 dead transitions. [2024-01-27 15:27:48,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 269 transitions, 4794 flow [2024-01-27 15:27:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:27:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:27:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-01-27 15:27:48,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-01-27 15:27:48,987 INFO L175 Difference]: Start difference. First operand has 241 places, 218 transitions, 4085 flow. Second operand 12 states and 153 transitions. [2024-01-27 15:27:48,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 269 transitions, 4794 flow [2024-01-27 15:27:49,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 269 transitions, 4639 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-01-27 15:27:49,093 INFO L231 Difference]: Finished difference. Result has 236 places, 212 transitions, 3966 flow [2024-01-27 15:27:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3966, PETRI_PLACES=236, PETRI_TRANSITIONS=212} [2024-01-27 15:27:49,094 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 205 predicate places. [2024-01-27 15:27:49,095 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 212 transitions, 3966 flow [2024-01-27 15:27:49,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:49,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:49,095 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:49,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:49,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:49,298 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:49,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:49,299 INFO L85 PathProgramCache]: Analyzing trace with hash 432181422, now seen corresponding path program 20 times [2024-01-27 15:27:49,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:49,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819556443] [2024-01-27 15:27:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:50,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:50,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819556443] [2024-01-27 15:27:50,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819556443] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:50,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977571470] [2024-01-27 15:27:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:27:50,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:50,466 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:50,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:27:50,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:27:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:50,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:27:50,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:51,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:52,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:52,095 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 51 treesize of output 95 [2024-01-27 15:27:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:52,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977571470] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:52,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:52,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-27 15:27:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106166833] [2024-01-27 15:27:52,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:52,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:52,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:52,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 212 transitions, 3966 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:52,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:52,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:52,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:53,465 INFO L124 PetriNetUnfolderBase]: 1979/3995 cut-off events. [2024-01-27 15:27:53,465 INFO L125 PetriNetUnfolderBase]: For 53668/53668 co-relation queries the response was YES. [2024-01-27 15:27:53,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19561 conditions, 3995 events. 1979/3995 cut-off events. For 53668/53668 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29995 event pairs, 357 based on Foata normal form. 24/4007 useless extension candidates. Maximal degree in co-relation 19452. Up to 1034 conditions per place. [2024-01-27 15:27:53,498 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 150 selfloop transitions, 129 changer transitions 16/298 dead transitions. [2024-01-27 15:27:53,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 298 transitions, 5102 flow [2024-01-27 15:27:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:27:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:27:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 235 transitions. [2024-01-27 15:27:53,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2024-01-27 15:27:53,499 INFO L175 Difference]: Start difference. First operand has 236 places, 212 transitions, 3966 flow. Second operand 20 states and 235 transitions. [2024-01-27 15:27:53,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 298 transitions, 5102 flow [2024-01-27 15:27:53,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 298 transitions, 4878 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-01-27 15:27:53,635 INFO L231 Difference]: Finished difference. Result has 240 places, 224 transitions, 4294 flow [2024-01-27 15:27:53,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3778, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4294, PETRI_PLACES=240, PETRI_TRANSITIONS=224} [2024-01-27 15:27:53,636 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 209 predicate places. [2024-01-27 15:27:53,636 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 224 transitions, 4294 flow [2024-01-27 15:27:53,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:53,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:53,636 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:53,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:27:53,848 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:53,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2107835451, now seen corresponding path program 21 times [2024-01-27 15:27:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476580462] [2024-01-27 15:27:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476580462] [2024-01-27 15:27:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476580462] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332943311] [2024-01-27 15:27:55,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:27:55,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:55,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:55,019 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:55,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:27:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:27:55,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:55,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:27:55,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:55,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:55,858 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 124 treesize of output 108 [2024-01-27 15:27:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:56,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:56,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:56,512 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 168 treesize of output 194 [2024-01-27 15:27:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332943311] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:56,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:56,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-27 15:27:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849286502] [2024-01-27 15:27:56,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:56,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:27:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:27:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:27:56,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:27:56,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 224 transitions, 4294 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 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) [2024-01-27 15:27:56,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:56,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:27:56,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:58,688 INFO L124 PetriNetUnfolderBase]: 2063/4154 cut-off events. [2024-01-27 15:27:58,689 INFO L125 PetriNetUnfolderBase]: For 53638/53638 co-relation queries the response was YES. [2024-01-27 15:27:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20558 conditions, 4154 events. 2063/4154 cut-off events. For 53638/53638 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31322 event pairs, 359 based on Foata normal form. 8/4150 useless extension candidates. Maximal degree in co-relation 20449. Up to 872 conditions per place. [2024-01-27 15:27:58,721 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 201 selfloop transitions, 124 changer transitions 30/358 dead transitions. [2024-01-27 15:27:58,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 358 transitions, 5699 flow [2024-01-27 15:27:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:27:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:27:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 336 transitions. [2024-01-27 15:27:58,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3310344827586207 [2024-01-27 15:27:58,726 INFO L175 Difference]: Start difference. First operand has 240 places, 224 transitions, 4294 flow. Second operand 29 states and 336 transitions. [2024-01-27 15:27:58,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 358 transitions, 5699 flow [2024-01-27 15:27:58,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 358 transitions, 5506 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-01-27 15:27:58,872 INFO L231 Difference]: Finished difference. Result has 262 places, 233 transitions, 4660 flow [2024-01-27 15:27:58,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4660, PETRI_PLACES=262, PETRI_TRANSITIONS=233} [2024-01-27 15:27:58,874 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 231 predicate places. [2024-01-27 15:27:58,874 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 233 transitions, 4660 flow [2024-01-27 15:27:58,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 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) [2024-01-27 15:27:58,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:58,875 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:58,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:59,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:27:59,088 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:59,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1717501087, now seen corresponding path program 22 times [2024-01-27 15:27:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:59,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876564668] [2024-01-27 15:27:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:59,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:00,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:00,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876564668] [2024-01-27 15:28:00,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876564668] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121689429] [2024-01-27 15:28:00,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:28:00,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:00,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:00,246 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:00,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:28:00,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:28:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:00,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:28:00,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:01,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:01,002 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 157 treesize of output 141 [2024-01-27 15:28:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:01,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:01,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:01,953 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 51 treesize of output 95 [2024-01-27 15:28:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121689429] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:02,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-01-27 15:28:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429638097] [2024-01-27 15:28:02,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:28:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:28:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:28:02,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:02,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 233 transitions, 4660 flow. Second operand has 21 states, 21 states have (on average 8.333333333333334) internal successors, (175), 21 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) [2024-01-27 15:28:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:02,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:03,494 INFO L124 PetriNetUnfolderBase]: 2155/4344 cut-off events. [2024-01-27 15:28:03,495 INFO L125 PetriNetUnfolderBase]: For 64314/64314 co-relation queries the response was YES. [2024-01-27 15:28:03,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21919 conditions, 4344 events. 2155/4344 cut-off events. For 64314/64314 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33210 event pairs, 695 based on Foata normal form. 10/4348 useless extension candidates. Maximal degree in co-relation 21807. Up to 1836 conditions per place. [2024-01-27 15:28:03,524 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 213 selfloop transitions, 89 changer transitions 7/312 dead transitions. [2024-01-27 15:28:03,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 312 transitions, 5830 flow [2024-01-27 15:28:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:28:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:28:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 185 transitions. [2024-01-27 15:28:03,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-01-27 15:28:03,526 INFO L175 Difference]: Start difference. First operand has 262 places, 233 transitions, 4660 flow. Second operand 14 states and 185 transitions. [2024-01-27 15:28:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 312 transitions, 5830 flow [2024-01-27 15:28:03,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 312 transitions, 5492 flow, removed 85 selfloop flow, removed 16 redundant places. [2024-01-27 15:28:03,663 INFO L231 Difference]: Finished difference. Result has 257 places, 241 transitions, 4763 flow [2024-01-27 15:28:03,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4763, PETRI_PLACES=257, PETRI_TRANSITIONS=241} [2024-01-27 15:28:03,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 226 predicate places. [2024-01-27 15:28:03,664 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 241 transitions, 4763 flow [2024-01-27 15:28:03,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.333333333333334) internal successors, (175), 21 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) [2024-01-27 15:28:03,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:03,665 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:03,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:03,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:03,865 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:03,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:03,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1692010981, now seen corresponding path program 23 times [2024-01-27 15:28:03,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:03,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959488771] [2024-01-27 15:28:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:03,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:05,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:05,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959488771] [2024-01-27 15:28:05,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959488771] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:05,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303518545] [2024-01-27 15:28:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:28:05,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:05,224 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:28:05,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:28:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:05,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:28:05,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:06,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:06,232 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 122 treesize of output 106 [2024-01-27 15:28:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:06,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:06,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:06,985 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 168 treesize of output 194 [2024-01-27 15:28:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303518545] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:07,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:07,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:28:07,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713492226] [2024-01-27 15:28:07,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:07,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:07,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:07,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 241 transitions, 4763 flow. Second operand has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:07,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:07,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:08,693 INFO L124 PetriNetUnfolderBase]: 2131/4287 cut-off events. [2024-01-27 15:28:08,694 INFO L125 PetriNetUnfolderBase]: For 57860/57860 co-relation queries the response was YES. [2024-01-27 15:28:08,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21259 conditions, 4287 events. 2131/4287 cut-off events. For 57860/57860 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32623 event pairs, 719 based on Foata normal form. 10/4291 useless extension candidates. Maximal degree in co-relation 21150. Up to 1910 conditions per place. [2024-01-27 15:28:08,729 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 200 selfloop transitions, 83 changer transitions 9/295 dead transitions. [2024-01-27 15:28:08,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 295 transitions, 5449 flow [2024-01-27 15:28:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:28:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:28:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 175 transitions. [2024-01-27 15:28:08,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-01-27 15:28:08,731 INFO L175 Difference]: Start difference. First operand has 257 places, 241 transitions, 4763 flow. Second operand 14 states and 175 transitions. [2024-01-27 15:28:08,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 295 transitions, 5449 flow [2024-01-27 15:28:08,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 295 transitions, 5187 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-01-27 15:28:08,872 INFO L231 Difference]: Finished difference. Result has 260 places, 238 transitions, 4601 flow [2024-01-27 15:28:08,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4601, PETRI_PLACES=260, PETRI_TRANSITIONS=238} [2024-01-27 15:28:08,873 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-01-27 15:28:08,873 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 238 transitions, 4601 flow [2024-01-27 15:28:08,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:08,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:08,873 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:08,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:09,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:09,087 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:09,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1885498011, now seen corresponding path program 24 times [2024-01-27 15:28:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:09,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120000167] [2024-01-27 15:28:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120000167] [2024-01-27 15:28:10,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120000167] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544886318] [2024-01-27 15:28:10,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:28:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:10,371 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:28:10,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:28:10,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:10,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:28:10,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:11,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:12,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:12,000 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 51 treesize of output 95 [2024-01-27 15:28:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:12,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544886318] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:12,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:12,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2024-01-27 15:28:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798119464] [2024-01-27 15:28:12,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:12,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:28:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:12,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:28:12,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:28:12,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:12,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 238 transitions, 4601 flow. Second operand has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:12,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:12,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:12,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:13,619 INFO L124 PetriNetUnfolderBase]: 2175/4375 cut-off events. [2024-01-27 15:28:13,619 INFO L125 PetriNetUnfolderBase]: For 56892/56892 co-relation queries the response was YES. [2024-01-27 15:28:13,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21707 conditions, 4375 events. 2175/4375 cut-off events. For 56892/56892 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33590 event pairs, 371 based on Foata normal form. 32/4375 useless extension candidates. Maximal degree in co-relation 21599. Up to 1394 conditions per place. [2024-01-27 15:28:13,657 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 186 selfloop transitions, 142 changer transitions 14/345 dead transitions. [2024-01-27 15:28:13,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 345 transitions, 5857 flow [2024-01-27 15:28:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:28:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:28:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 258 transitions. [2024-01-27 15:28:13,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36857142857142855 [2024-01-27 15:28:13,673 INFO L175 Difference]: Start difference. First operand has 260 places, 238 transitions, 4601 flow. Second operand 20 states and 258 transitions. [2024-01-27 15:28:13,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 345 transitions, 5857 flow [2024-01-27 15:28:13,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 345 transitions, 5725 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-01-27 15:28:13,810 INFO L231 Difference]: Finished difference. Result has 271 places, 251 transitions, 5064 flow [2024-01-27 15:28:13,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5064, PETRI_PLACES=271, PETRI_TRANSITIONS=251} [2024-01-27 15:28:13,811 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 240 predicate places. [2024-01-27 15:28:13,811 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 251 transitions, 5064 flow [2024-01-27 15:28:13,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:13,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:13,812 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:13,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-01-27 15:28:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:14,025 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:14,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2072999533, now seen corresponding path program 25 times [2024-01-27 15:28:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:14,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804151822] [2024-01-27 15:28:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804151822] [2024-01-27 15:28:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804151822] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825227653] [2024-01-27 15:28:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:28:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:15,364 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:15,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:28:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:15,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:28:15,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:16,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:16,187 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 92 treesize of output 88 [2024-01-27 15:28:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:16,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:16,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:16,627 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 168 treesize of output 194 [2024-01-27 15:28:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:16,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825227653] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:16,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:16,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:28:16,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747123319] [2024-01-27 15:28:16,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:16,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:16,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:16,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:16,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 251 transitions, 5064 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:16,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:16,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:16,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:18,156 INFO L124 PetriNetUnfolderBase]: 2153/4298 cut-off events. [2024-01-27 15:28:18,157 INFO L125 PetriNetUnfolderBase]: For 59514/59514 co-relation queries the response was YES. [2024-01-27 15:28:18,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22075 conditions, 4298 events. 2153/4298 cut-off events. For 59514/59514 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32848 event pairs, 881 based on Foata normal form. 4/4296 useless extension candidates. Maximal degree in co-relation 21963. Up to 2140 conditions per place. [2024-01-27 15:28:18,189 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 194 selfloop transitions, 74 changer transitions 13/284 dead transitions. [2024-01-27 15:28:18,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 284 transitions, 5694 flow [2024-01-27 15:28:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:28:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:28:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-01-27 15:28:18,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33506493506493507 [2024-01-27 15:28:18,190 INFO L175 Difference]: Start difference. First operand has 271 places, 251 transitions, 5064 flow. Second operand 11 states and 129 transitions. [2024-01-27 15:28:18,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 284 transitions, 5694 flow [2024-01-27 15:28:18,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 284 transitions, 5464 flow, removed 30 selfloop flow, removed 14 redundant places. [2024-01-27 15:28:18,327 INFO L231 Difference]: Finished difference. Result has 266 places, 247 transitions, 4898 flow [2024-01-27 15:28:18,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4898, PETRI_PLACES=266, PETRI_TRANSITIONS=247} [2024-01-27 15:28:18,328 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-01-27 15:28:18,328 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 247 transitions, 4898 flow [2024-01-27 15:28:18,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:18,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:18,329 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:18,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-01-27 15:28:18,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:18,541 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:18,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1519426507, now seen corresponding path program 26 times [2024-01-27 15:28:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588746913] [2024-01-27 15:28:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588746913] [2024-01-27 15:28:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588746913] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747088029] [2024-01-27 15:28:19,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:28:19,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:19,956 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:28:20,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:28:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:20,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:28:20,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:20,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:20,953 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 124 treesize of output 108 [2024-01-27 15:28:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:21,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:21,768 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:28:21,769 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 164 treesize of output 177 [2024-01-27 15:28:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747088029] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:22,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:22,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:28:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103340327] [2024-01-27 15:28:22,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:22,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:22,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:22,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 247 transitions, 4898 flow. Second operand has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:22,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:22,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:22,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:23,702 INFO L124 PetriNetUnfolderBase]: 2201/4405 cut-off events. [2024-01-27 15:28:23,702 INFO L125 PetriNetUnfolderBase]: For 61005/61005 co-relation queries the response was YES. [2024-01-27 15:28:23,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22411 conditions, 4405 events. 2201/4405 cut-off events. For 61005/61005 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33762 event pairs, 583 based on Foata normal form. 10/4409 useless extension candidates. Maximal degree in co-relation 22301. Up to 1044 conditions per place. [2024-01-27 15:28:23,734 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 198 selfloop transitions, 121 changer transitions 13/335 dead transitions. [2024-01-27 15:28:23,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 335 transitions, 6078 flow [2024-01-27 15:28:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:28:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:28:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 212 transitions. [2024-01-27 15:28:23,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-01-27 15:28:23,735 INFO L175 Difference]: Start difference. First operand has 266 places, 247 transitions, 4898 flow. Second operand 16 states and 212 transitions. [2024-01-27 15:28:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 335 transitions, 6078 flow [2024-01-27 15:28:23,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 335 transitions, 5892 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-01-27 15:28:23,862 INFO L231 Difference]: Finished difference. Result has 268 places, 249 transitions, 5011 flow [2024-01-27 15:28:23,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5011, PETRI_PLACES=268, PETRI_TRANSITIONS=249} [2024-01-27 15:28:23,862 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2024-01-27 15:28:23,863 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 249 transitions, 5011 flow [2024-01-27 15:28:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:23,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:23,863 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:23,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:24,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-27 15:28:24,068 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:24,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1916324001, now seen corresponding path program 27 times [2024-01-27 15:28:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874140590] [2024-01-27 15:28:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:25,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:25,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874140590] [2024-01-27 15:28:25,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874140590] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519009472] [2024-01-27 15:28:25,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:28:25,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:25,361 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:25,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 15:28:25,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:28:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:25,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:28:25,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:26,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:26,212 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 157 treesize of output 137 [2024-01-27 15:28:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:26,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:26,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:26,975 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 51 treesize of output 95 [2024-01-27 15:28:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519009472] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:27,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:27,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:28:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255315698] [2024-01-27 15:28:27,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:27,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:27,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:27,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:27,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 249 transitions, 5011 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:27,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:27,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:27,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:28,243 INFO L124 PetriNetUnfolderBase]: 2161/4322 cut-off events. [2024-01-27 15:28:28,243 INFO L125 PetriNetUnfolderBase]: For 58885/58885 co-relation queries the response was YES. [2024-01-27 15:28:28,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22204 conditions, 4322 events. 2161/4322 cut-off events. For 58885/58885 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32971 event pairs, 747 based on Foata normal form. 4/4320 useless extension candidates. Maximal degree in co-relation 22094. Up to 1930 conditions per place. [2024-01-27 15:28:28,274 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 198 selfloop transitions, 88 changer transitions 11/300 dead transitions. [2024-01-27 15:28:28,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 300 transitions, 5780 flow [2024-01-27 15:28:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:28:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:28:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 161 transitions. [2024-01-27 15:28:28,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2024-01-27 15:28:28,284 INFO L175 Difference]: Start difference. First operand has 268 places, 249 transitions, 5011 flow. Second operand 13 states and 161 transitions. [2024-01-27 15:28:28,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 300 transitions, 5780 flow [2024-01-27 15:28:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 300 transitions, 5499 flow, removed 23 selfloop flow, removed 14 redundant places. [2024-01-27 15:28:28,412 INFO L231 Difference]: Finished difference. Result has 264 places, 246 transitions, 4862 flow [2024-01-27 15:28:28,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4709, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4862, PETRI_PLACES=264, PETRI_TRANSITIONS=246} [2024-01-27 15:28:28,413 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 233 predicate places. [2024-01-27 15:28:28,413 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 246 transitions, 4862 flow [2024-01-27 15:28:28,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:28,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:28,413 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:28,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:28,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:28,627 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:28,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 858284299, now seen corresponding path program 28 times [2024-01-27 15:28:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:28,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531529170] [2024-01-27 15:28:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:28,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531529170] [2024-01-27 15:28:29,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531529170] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990946292] [2024-01-27 15:28:29,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:28:29,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:29,911 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:29,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 15:28:30,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:28:30,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:30,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:28:30,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:30,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:30,806 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 124 treesize of output 112 [2024-01-27 15:28:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:31,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:31,394 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:28:31,394 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 164 treesize of output 177 [2024-01-27 15:28:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:31,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990946292] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:31,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:31,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:28:31,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287474451] [2024-01-27 15:28:31,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:31,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:31,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:31,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:31,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:31,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:31,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 246 transitions, 4862 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:33,681 INFO L124 PetriNetUnfolderBase]: 2131/4246 cut-off events. [2024-01-27 15:28:33,682 INFO L125 PetriNetUnfolderBase]: For 55939/55939 co-relation queries the response was YES. [2024-01-27 15:28:33,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21659 conditions, 4246 events. 2131/4246 cut-off events. For 55939/55939 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32156 event pairs, 563 based on Foata normal form. 4/4244 useless extension candidates. Maximal degree in co-relation 21551. Up to 1044 conditions per place. [2024-01-27 15:28:33,717 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 194 selfloop transitions, 118 changer transitions 18/333 dead transitions. [2024-01-27 15:28:33,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 333 transitions, 5939 flow [2024-01-27 15:28:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:28:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:28:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 220 transitions. [2024-01-27 15:28:33,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697478991596639 [2024-01-27 15:28:33,718 INFO L175 Difference]: Start difference. First operand has 264 places, 246 transitions, 4862 flow. Second operand 17 states and 220 transitions. [2024-01-27 15:28:33,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 333 transitions, 5939 flow [2024-01-27 15:28:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 333 transitions, 5739 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-01-27 15:28:33,842 INFO L231 Difference]: Finished difference. Result has 266 places, 244 transitions, 4853 flow [2024-01-27 15:28:33,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4853, PETRI_PLACES=266, PETRI_TRANSITIONS=244} [2024-01-27 15:28:33,843 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-01-27 15:28:33,843 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 244 transitions, 4853 flow [2024-01-27 15:28:33,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:33,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:33,843 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:33,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-01-27 15:28:34,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:34,057 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:34,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1423608523, now seen corresponding path program 29 times [2024-01-27 15:28:34,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:34,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187664855] [2024-01-27 15:28:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:34,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187664855] [2024-01-27 15:28:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187664855] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137939838] [2024-01-27 15:28:35,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:28:35,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:35,376 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:35,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 15:28:35,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:28:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:35,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:28:35,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:36,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:36,402 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 127 treesize of output 119 [2024-01-27 15:28:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:36,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:36,939 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:28:36,940 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 164 treesize of output 177 [2024-01-27 15:28:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:37,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137939838] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:37,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:37,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:28:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69334920] [2024-01-27 15:28:37,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:37,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:28:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:28:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:28:37,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:37,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 244 transitions, 4853 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:28:37,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:37,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:37,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:38,809 INFO L124 PetriNetUnfolderBase]: 2091/4170 cut-off events. [2024-01-27 15:28:38,810 INFO L125 PetriNetUnfolderBase]: For 54799/54799 co-relation queries the response was YES. [2024-01-27 15:28:38,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21412 conditions, 4170 events. 2091/4170 cut-off events. For 54799/54799 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31502 event pairs, 667 based on Foata normal form. 4/4168 useless extension candidates. Maximal degree in co-relation 21305. Up to 1128 conditions per place. [2024-01-27 15:28:38,845 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 170 selfloop transitions, 110 changer transitions 14/297 dead transitions. [2024-01-27 15:28:38,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 297 transitions, 5705 flow [2024-01-27 15:28:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:28:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:28:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 157 transitions. [2024-01-27 15:28:38,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34505494505494505 [2024-01-27 15:28:38,846 INFO L175 Difference]: Start difference. First operand has 266 places, 244 transitions, 4853 flow. Second operand 13 states and 157 transitions. [2024-01-27 15:28:38,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 297 transitions, 5705 flow [2024-01-27 15:28:38,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 297 transitions, 5476 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-01-27 15:28:38,970 INFO L231 Difference]: Finished difference. Result has 263 places, 242 transitions, 4792 flow [2024-01-27 15:28:38,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4792, PETRI_PLACES=263, PETRI_TRANSITIONS=242} [2024-01-27 15:28:38,970 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 232 predicate places. [2024-01-27 15:28:38,970 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 242 transitions, 4792 flow [2024-01-27 15:28:38,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 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) [2024-01-27 15:28:38,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:38,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:38,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:39,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-27 15:28:39,184 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:39,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -131617887, now seen corresponding path program 30 times [2024-01-27 15:28:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:39,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491460323] [2024-01-27 15:28:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:40,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491460323] [2024-01-27 15:28:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491460323] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61793399] [2024-01-27 15:28:40,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:28:40,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:40,576 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:40,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 15:28:41,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:28:41,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:41,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:28:41,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:41,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:41,606 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 92 treesize of output 84 [2024-01-27 15:28:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:41,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:42,126 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:28:42,127 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 164 treesize of output 177 [2024-01-27 15:28:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61793399] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:42,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:42,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:28:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218481338] [2024-01-27 15:28:42,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:42,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:42,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:42,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:42,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 242 transitions, 4792 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:42,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:42,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:42,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:43,695 INFO L124 PetriNetUnfolderBase]: 2053/4089 cut-off events. [2024-01-27 15:28:43,695 INFO L125 PetriNetUnfolderBase]: For 53891/53891 co-relation queries the response was YES. [2024-01-27 15:28:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21096 conditions, 4089 events. 2053/4089 cut-off events. For 53891/53891 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30770 event pairs, 663 based on Foata normal form. 4/4087 useless extension candidates. Maximal degree in co-relation 21043. Up to 1160 conditions per place. [2024-01-27 15:28:43,727 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 169 selfloop transitions, 102 changer transitions 11/285 dead transitions. [2024-01-27 15:28:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 285 transitions, 5584 flow [2024-01-27 15:28:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:28:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:28:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-01-27 15:28:43,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628571428571429 [2024-01-27 15:28:43,731 INFO L175 Difference]: Start difference. First operand has 263 places, 242 transitions, 4792 flow. Second operand 10 states and 127 transitions. [2024-01-27 15:28:43,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 285 transitions, 5584 flow [2024-01-27 15:28:43,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 285 transitions, 5376 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-01-27 15:28:43,850 INFO L231 Difference]: Finished difference. Result has 259 places, 238 transitions, 4684 flow [2024-01-27 15:28:43,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4684, PETRI_PLACES=259, PETRI_TRANSITIONS=238} [2024-01-27 15:28:43,851 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 228 predicate places. [2024-01-27 15:28:43,851 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 238 transitions, 4684 flow [2024-01-27 15:28:43,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:43,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:43,852 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:43,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 15:28:44,066 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:44,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash 690430354, now seen corresponding path program 31 times [2024-01-27 15:28:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:44,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742902450] [2024-01-27 15:28:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:44,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:28:45,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742902450] [2024-01-27 15:28:45,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742902450] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064279066] [2024-01-27 15:28:45,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:28:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:45,463 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:45,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 15:28:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:45,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:28:45,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:46,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:46,774 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:28:46,775 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 75 [2024-01-27 15:28:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:46,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064279066] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:46,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:46,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2024-01-27 15:28:46,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593890010] [2024-01-27 15:28:46,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:46,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:28:46,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:28:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:28:46,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:46,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 238 transitions, 4684 flow. Second operand has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 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) [2024-01-27 15:28:46,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:46,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:46,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:48,471 INFO L124 PetriNetUnfolderBase]: 2099/4179 cut-off events. [2024-01-27 15:28:48,471 INFO L125 PetriNetUnfolderBase]: For 55207/55207 co-relation queries the response was YES. [2024-01-27 15:28:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21764 conditions, 4179 events. 2099/4179 cut-off events. For 55207/55207 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31575 event pairs, 435 based on Foata normal form. 16/4191 useless extension candidates. Maximal degree in co-relation 21711. Up to 1112 conditions per place. [2024-01-27 15:28:48,509 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 169 selfloop transitions, 139 changer transitions 11/322 dead transitions. [2024-01-27 15:28:48,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 322 transitions, 6033 flow [2024-01-27 15:28:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:28:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:28:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 209 transitions. [2024-01-27 15:28:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33174603174603173 [2024-01-27 15:28:48,516 INFO L175 Difference]: Start difference. First operand has 259 places, 238 transitions, 4684 flow. Second operand 18 states and 209 transitions. [2024-01-27 15:28:48,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 322 transitions, 6033 flow [2024-01-27 15:28:48,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 322 transitions, 5830 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-01-27 15:28:48,628 INFO L231 Difference]: Finished difference. Result has 266 places, 249 transitions, 5088 flow [2024-01-27 15:28:48,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5088, PETRI_PLACES=266, PETRI_TRANSITIONS=249} [2024-01-27 15:28:48,629 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-01-27 15:28:48,629 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 249 transitions, 5088 flow [2024-01-27 15:28:48,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 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) [2024-01-27 15:28:48,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:48,629 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:48,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-01-27 15:28:48,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-27 15:28:48,843 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:48,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1987276266, now seen corresponding path program 32 times [2024-01-27 15:28:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:48,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997577343] [2024-01-27 15:28:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997577343] [2024-01-27 15:28:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997577343] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418956601] [2024-01-27 15:28:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:28:50,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:50,108 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:50,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 15:28:50,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:28:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:50,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:28:50,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:50,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:50,867 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 157 treesize of output 137 [2024-01-27 15:28:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:51,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:51,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:51,680 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 51 treesize of output 95 [2024-01-27 15:28:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418956601] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:51,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:51,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:28:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936770802] [2024-01-27 15:28:51,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:51,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:51,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:51,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:51,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 249 transitions, 5088 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:51,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:51,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:51,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:53,227 INFO L124 PetriNetUnfolderBase]: 2269/4476 cut-off events. [2024-01-27 15:28:53,227 INFO L125 PetriNetUnfolderBase]: For 61867/61867 co-relation queries the response was YES. [2024-01-27 15:28:53,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23847 conditions, 4476 events. 2269/4476 cut-off events. For 61867/61867 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33968 event pairs, 787 based on Foata normal form. 8/4468 useless extension candidates. Maximal degree in co-relation 23795. Up to 1976 conditions per place. [2024-01-27 15:28:53,262 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 223 selfloop transitions, 108 changer transitions 11/345 dead transitions. [2024-01-27 15:28:53,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 345 transitions, 6445 flow [2024-01-27 15:28:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:28:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:28:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2024-01-27 15:28:53,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3473684210526316 [2024-01-27 15:28:53,264 INFO L175 Difference]: Start difference. First operand has 266 places, 249 transitions, 5088 flow. Second operand 19 states and 231 transitions. [2024-01-27 15:28:53,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 345 transitions, 6445 flow [2024-01-27 15:28:53,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 345 transitions, 6352 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-27 15:28:53,398 INFO L231 Difference]: Finished difference. Result has 282 places, 266 transitions, 5772 flow [2024-01-27 15:28:53,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5772, PETRI_PLACES=282, PETRI_TRANSITIONS=266} [2024-01-27 15:28:53,398 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 251 predicate places. [2024-01-27 15:28:53,399 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 266 transitions, 5772 flow [2024-01-27 15:28:53,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:53,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:53,399 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:53,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:53,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 15:28:53,609 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:53,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash 170050242, now seen corresponding path program 33 times [2024-01-27 15:28:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:53,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042215790] [2024-01-27 15:28:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:53,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:54,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042215790] [2024-01-27 15:28:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042215790] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:54,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093697639] [2024-01-27 15:28:54,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:28:54,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:54,870 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:54,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 15:28:55,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:28:55,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:55,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:28:55,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:55,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:55,845 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 124 treesize of output 108 [2024-01-27 15:28:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:56,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:56,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:56,388 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 168 treesize of output 194 [2024-01-27 15:28:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:56,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093697639] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:56,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:56,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:28:56,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815569519] [2024-01-27 15:28:56,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:56,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:28:56,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:28:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:28:56,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:28:56,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 266 transitions, 5772 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:56,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:56,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:28:56,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:58,106 INFO L124 PetriNetUnfolderBase]: 2209/4363 cut-off events. [2024-01-27 15:28:58,106 INFO L125 PetriNetUnfolderBase]: For 66948/66948 co-relation queries the response was YES. [2024-01-27 15:28:58,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23971 conditions, 4363 events. 2209/4363 cut-off events. For 66948/66948 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33100 event pairs, 817 based on Foata normal form. 12/4347 useless extension candidates. Maximal degree in co-relation 23913. Up to 2042 conditions per place. [2024-01-27 15:28:58,136 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 218 selfloop transitions, 101 changer transitions 16/338 dead transitions. [2024-01-27 15:28:58,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 338 transitions, 6636 flow [2024-01-27 15:28:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:28:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:28:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 201 transitions. [2024-01-27 15:28:58,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35892857142857143 [2024-01-27 15:28:58,156 INFO L175 Difference]: Start difference. First operand has 282 places, 266 transitions, 5772 flow. Second operand 16 states and 201 transitions. [2024-01-27 15:28:58,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 338 transitions, 6636 flow [2024-01-27 15:28:58,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 338 transitions, 6448 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-01-27 15:28:58,312 INFO L231 Difference]: Finished difference. Result has 289 places, 261 transitions, 5658 flow [2024-01-27 15:28:58,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5517, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5658, PETRI_PLACES=289, PETRI_TRANSITIONS=261} [2024-01-27 15:28:58,312 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-01-27 15:28:58,313 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 261 transitions, 5658 flow [2024-01-27 15:28:58,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:58,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:58,313 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:58,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:58,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:58,530 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:58,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash 515999210, now seen corresponding path program 34 times [2024-01-27 15:28:58,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:58,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160977846] [2024-01-27 15:28:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:58,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:59,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:59,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160977846] [2024-01-27 15:28:59,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160977846] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:59,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370323175] [2024-01-27 15:28:59,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:28:59,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:59,879 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:59,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 15:29:00,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:00,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:00,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:29:00,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:00,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:00,700 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 157 treesize of output 137 [2024-01-27 15:29:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:00,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:01,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:01,448 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 51 treesize of output 95 [2024-01-27 15:29:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370323175] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:01,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:29:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632573025] [2024-01-27 15:29:01,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:01,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:29:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:29:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:29:01,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:01,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 261 transitions, 5658 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:01,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:01,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:02,920 INFO L124 PetriNetUnfolderBase]: 2081/4077 cut-off events. [2024-01-27 15:29:02,920 INFO L125 PetriNetUnfolderBase]: For 63034/63034 co-relation queries the response was YES. [2024-01-27 15:29:02,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22937 conditions, 4077 events. 2081/4077 cut-off events. For 63034/63034 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30545 event pairs, 779 based on Foata normal form. 12/4061 useless extension candidates. Maximal degree in co-relation 22879. Up to 1924 conditions per place. [2024-01-27 15:29:02,953 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 213 selfloop transitions, 94 changer transitions 8/318 dead transitions. [2024-01-27 15:29:02,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 318 transitions, 6393 flow [2024-01-27 15:29:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:29:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:29:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 191 transitions. [2024-01-27 15:29:02,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410714285714286 [2024-01-27 15:29:02,954 INFO L175 Difference]: Start difference. First operand has 289 places, 261 transitions, 5658 flow. Second operand 16 states and 191 transitions. [2024-01-27 15:29:02,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 318 transitions, 6393 flow [2024-01-27 15:29:03,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 318 transitions, 6204 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-01-27 15:29:03,089 INFO L231 Difference]: Finished difference. Result has 289 places, 256 transitions, 5530 flow [2024-01-27 15:29:03,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5530, PETRI_PLACES=289, PETRI_TRANSITIONS=256} [2024-01-27 15:29:03,090 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-01-27 15:29:03,090 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 256 transitions, 5530 flow [2024-01-27 15:29:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:03,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:03,091 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:03,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:03,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-27 15:29:03,305 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:03,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1265209454, now seen corresponding path program 35 times [2024-01-27 15:29:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794779190] [2024-01-27 15:29:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:03,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794779190] [2024-01-27 15:29:04,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794779190] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285362691] [2024-01-27 15:29:04,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:04,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:04,639 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:04,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-27 15:29:05,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:29:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:05,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:29:05,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:05,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:05,705 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 127 treesize of output 115 [2024-01-27 15:29:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:05,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:06,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:06,188 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 168 treesize of output 194 [2024-01-27 15:29:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285362691] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:06,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:29:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340769475] [2024-01-27 15:29:06,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:29:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:29:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:29:06,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:06,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 256 transitions, 5530 flow. Second operand has 20 states, 20 states have (on average 7.55) internal successors, (151), 20 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) [2024-01-27 15:29:06,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:06,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:06,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:07,755 INFO L124 PetriNetUnfolderBase]: 2041/3990 cut-off events. [2024-01-27 15:29:07,756 INFO L125 PetriNetUnfolderBase]: For 61830/61830 co-relation queries the response was YES. [2024-01-27 15:29:07,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22533 conditions, 3990 events. 2041/3990 cut-off events. For 61830/61830 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29665 event pairs, 769 based on Foata normal form. 6/3968 useless extension candidates. Maximal degree in co-relation 22476. Up to 1912 conditions per place. [2024-01-27 15:29:07,788 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 192 selfloop transitions, 88 changer transitions 18/301 dead transitions. [2024-01-27 15:29:07,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 301 transitions, 6230 flow [2024-01-27 15:29:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:29:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:29:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-01-27 15:29:07,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-01-27 15:29:07,790 INFO L175 Difference]: Start difference. First operand has 289 places, 256 transitions, 5530 flow. Second operand 12 states and 148 transitions. [2024-01-27 15:29:07,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 301 transitions, 6230 flow [2024-01-27 15:29:07,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 301 transitions, 6165 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-01-27 15:29:07,918 INFO L231 Difference]: Finished difference. Result has 289 places, 252 transitions, 5524 flow [2024-01-27 15:29:07,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5524, PETRI_PLACES=289, PETRI_TRANSITIONS=252} [2024-01-27 15:29:07,919 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-01-27 15:29:07,919 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 252 transitions, 5524 flow [2024-01-27 15:29:07,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.55) internal successors, (151), 20 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) [2024-01-27 15:29:07,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:07,920 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:07,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:08,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-27 15:29:08,134 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:08,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -523595122, now seen corresponding path program 36 times [2024-01-27 15:29:08,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:08,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287929542] [2024-01-27 15:29:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:09,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287929542] [2024-01-27 15:29:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287929542] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51712215] [2024-01-27 15:29:09,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:29:09,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:09,478 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:09,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-27 15:29:10,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:29:10,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:10,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:29:10,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:10,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:10,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:10,953 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 51 treesize of output 95 [2024-01-27 15:29:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51712215] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:11,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:11,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-27 15:29:11,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006399114] [2024-01-27 15:29:11,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:11,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:29:11,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:29:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:29:11,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:11,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 252 transitions, 5524 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:11,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:11,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:11,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:12,492 INFO L124 PetriNetUnfolderBase]: 2007/3929 cut-off events. [2024-01-27 15:29:12,492 INFO L125 PetriNetUnfolderBase]: For 64497/64497 co-relation queries the response was YES. [2024-01-27 15:29:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22491 conditions, 3929 events. 2007/3929 cut-off events. For 64497/64497 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28791 event pairs, 369 based on Foata normal form. 12/3929 useless extension candidates. Maximal degree in co-relation 22434. Up to 898 conditions per place. [2024-01-27 15:29:12,528 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 157 selfloop transitions, 143 changer transitions 14/317 dead transitions. [2024-01-27 15:29:12,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 317 transitions, 6308 flow [2024-01-27 15:29:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:29:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:29:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 222 transitions. [2024-01-27 15:29:12,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3171428571428571 [2024-01-27 15:29:12,530 INFO L175 Difference]: Start difference. First operand has 289 places, 252 transitions, 5524 flow. Second operand 20 states and 222 transitions. [2024-01-27 15:29:12,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 317 transitions, 6308 flow [2024-01-27 15:29:12,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 317 transitions, 6075 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-01-27 15:29:12,665 INFO L231 Difference]: Finished difference. Result has 292 places, 251 transitions, 5567 flow [2024-01-27 15:29:12,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5567, PETRI_PLACES=292, PETRI_TRANSITIONS=251} [2024-01-27 15:29:12,666 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 261 predicate places. [2024-01-27 15:29:12,666 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 251 transitions, 5567 flow [2024-01-27 15:29:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:12,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:12,667 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:12,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:12,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-01-27 15:29:12,881 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:12,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash 432314024, now seen corresponding path program 37 times [2024-01-27 15:29:12,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:12,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44978796] [2024-01-27 15:29:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:12,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:14,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:14,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44978796] [2024-01-27 15:29:14,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44978796] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354177309] [2024-01-27 15:29:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:29:14,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:14,204 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:14,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-27 15:29:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:14,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:29:14,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:14,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:15,564 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:29:15,565 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 75 [2024-01-27 15:29:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354177309] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:15,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:15,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:29:15,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961613834] [2024-01-27 15:29:15,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:29:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:29:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:29:15,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:15,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 251 transitions, 5567 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:15,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:15,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:15,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:17,050 INFO L124 PetriNetUnfolderBase]: 2053/4019 cut-off events. [2024-01-27 15:29:17,050 INFO L125 PetriNetUnfolderBase]: For 66611/66611 co-relation queries the response was YES. [2024-01-27 15:29:17,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23376 conditions, 4019 events. 2053/4019 cut-off events. For 66611/66611 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29927 event pairs, 447 based on Foata normal form. 12/4027 useless extension candidates. Maximal degree in co-relation 23320. Up to 1752 conditions per place. [2024-01-27 15:29:17,086 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 209 selfloop transitions, 87 changer transitions 11/310 dead transitions. [2024-01-27 15:29:17,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 310 transitions, 6610 flow [2024-01-27 15:29:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:29:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:29:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 173 transitions. [2024-01-27 15:29:17,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295238095238095 [2024-01-27 15:29:17,092 INFO L175 Difference]: Start difference. First operand has 292 places, 251 transitions, 5567 flow. Second operand 15 states and 173 transitions. [2024-01-27 15:29:17,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 310 transitions, 6610 flow [2024-01-27 15:29:17,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 310 transitions, 6475 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-01-27 15:29:17,233 INFO L231 Difference]: Finished difference. Result has 294 places, 257 transitions, 5815 flow [2024-01-27 15:29:17,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5815, PETRI_PLACES=294, PETRI_TRANSITIONS=257} [2024-01-27 15:29:17,234 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 263 predicate places. [2024-01-27 15:29:17,234 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 257 transitions, 5815 flow [2024-01-27 15:29:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:17,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:17,235 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:17,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:17,451 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:17,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:17,451 INFO L85 PathProgramCache]: Analyzing trace with hash 412460814, now seen corresponding path program 38 times [2024-01-27 15:29:17,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:17,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925104592] [2024-01-27 15:29:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:29:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:19,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925104592] [2024-01-27 15:29:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925104592] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:19,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752077794] [2024-01-27 15:29:19,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:19,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:19,251 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:19,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-27 15:29:19,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:19,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:29:19,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:20,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:20,110 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 157 treesize of output 137 [2024-01-27 15:29:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:20,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:20,885 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:29:20,885 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 75 [2024-01-27 15:29:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752077794] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:20,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 28 [2024-01-27 15:29:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455949445] [2024-01-27 15:29:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:20,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:29:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:29:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:29:20,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:20,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 257 transitions, 5815 flow. Second operand has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:20,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:20,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:20,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:23,711 INFO L124 PetriNetUnfolderBase]: 2153/4224 cut-off events. [2024-01-27 15:29:23,712 INFO L125 PetriNetUnfolderBase]: For 74594/74594 co-relation queries the response was YES. [2024-01-27 15:29:23,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24919 conditions, 4224 events. 2153/4224 cut-off events. For 74594/74594 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31660 event pairs, 349 based on Foata normal form. 22/4242 useless extension candidates. Maximal degree in co-relation 24862. Up to 1006 conditions per place. [2024-01-27 15:29:23,747 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 207 selfloop transitions, 202 changer transitions 27/439 dead transitions. [2024-01-27 15:29:23,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 439 transitions, 7965 flow [2024-01-27 15:29:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 15:29:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 15:29:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 449 transitions. [2024-01-27 15:29:23,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32071428571428573 [2024-01-27 15:29:23,749 INFO L175 Difference]: Start difference. First operand has 294 places, 257 transitions, 5815 flow. Second operand 40 states and 449 transitions. [2024-01-27 15:29:23,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 439 transitions, 7965 flow [2024-01-27 15:29:23,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 439 transitions, 7781 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-01-27 15:29:23,894 INFO L231 Difference]: Finished difference. Result has 326 places, 284 transitions, 6822 flow [2024-01-27 15:29:23,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5617, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6822, PETRI_PLACES=326, PETRI_TRANSITIONS=284} [2024-01-27 15:29:23,895 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 295 predicate places. [2024-01-27 15:29:23,895 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 284 transitions, 6822 flow [2024-01-27 15:29:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:23,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:23,895 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:23,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-27 15:29:24,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:24,110 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:24,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:24,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1274574909, now seen corresponding path program 39 times [2024-01-27 15:29:24,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:24,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17741617] [2024-01-27 15:29:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:24,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:25,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:25,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17741617] [2024-01-27 15:29:25,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17741617] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:25,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477336450] [2024-01-27 15:29:25,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:25,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:25,634 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:25,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-27 15:29:26,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:29:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:26,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:29:26,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:26,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:26,688 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 184 treesize of output 156 [2024-01-27 15:29:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-01-27 15:29:26,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:27,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:27,511 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 51 treesize of output 95 [2024-01-27 15:29:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-01-27 15:29:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477336450] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:27,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-01-27 15:29:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708300124] [2024-01-27 15:29:27,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:29:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:29:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:29:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:27,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 284 transitions, 6822 flow. Second operand has 21 states, 21 states have (on average 8.047619047619047) internal successors, (169), 21 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:27,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:29,025 INFO L124 PetriNetUnfolderBase]: 2073/4002 cut-off events. [2024-01-27 15:29:29,025 INFO L125 PetriNetUnfolderBase]: For 77204/77204 co-relation queries the response was YES. [2024-01-27 15:29:29,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24761 conditions, 4002 events. 2073/4002 cut-off events. For 77204/77204 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29740 event pairs, 663 based on Foata normal form. 14/4008 useless extension candidates. Maximal degree in co-relation 24700. Up to 1566 conditions per place. [2024-01-27 15:29:29,055 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 216 selfloop transitions, 118 changer transitions 18/355 dead transitions. [2024-01-27 15:29:29,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 355 transitions, 7616 flow [2024-01-27 15:29:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:29:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:29:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 233 transitions. [2024-01-27 15:29:29,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33285714285714285 [2024-01-27 15:29:29,057 INFO L175 Difference]: Start difference. First operand has 326 places, 284 transitions, 6822 flow. Second operand 20 states and 233 transitions. [2024-01-27 15:29:29,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 355 transitions, 7616 flow [2024-01-27 15:29:29,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 355 transitions, 7113 flow, removed 91 selfloop flow, removed 34 redundant places. [2024-01-27 15:29:29,183 INFO L231 Difference]: Finished difference. Result has 304 places, 281 transitions, 6480 flow [2024-01-27 15:29:29,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6480, PETRI_PLACES=304, PETRI_TRANSITIONS=281} [2024-01-27 15:29:29,184 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 273 predicate places. [2024-01-27 15:29:29,184 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 281 transitions, 6480 flow [2024-01-27 15:29:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.047619047619047) internal successors, (169), 21 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:29,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:29,185 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:29,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-27 15:29:29,399 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:29,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 219659268, now seen corresponding path program 40 times [2024-01-27 15:29:29,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:29,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176621014] [2024-01-27 15:29:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:29,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176621014] [2024-01-27 15:29:32,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176621014] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10644749] [2024-01-27 15:29:32,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:29:32,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:32,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:32,897 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:32,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-27 15:29:33,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:33,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-27 15:29:33,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:34,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:34,450 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 336 treesize of output 276 [2024-01-27 15:29:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:35,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:37,411 INFO L349 Elim1Store]: treesize reduction 13, result has 81.2 percent of original size [2024-01-27 15:29:37,411 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 335 treesize of output 306 [2024-01-27 15:29:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:38,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10644749] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:38,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:38,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 30 [2024-01-27 15:29:38,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030801994] [2024-01-27 15:29:38,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:29:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:29:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:29:38,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:38,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 281 transitions, 6480 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:38,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:38,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:38,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:41,470 INFO L124 PetriNetUnfolderBase]: 2659/5181 cut-off events. [2024-01-27 15:29:41,470 INFO L125 PetriNetUnfolderBase]: For 90110/90110 co-relation queries the response was YES. [2024-01-27 15:29:41,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30779 conditions, 5181 events. 2659/5181 cut-off events. For 90110/90110 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 40385 event pairs, 635 based on Foata normal form. 3/5182 useless extension candidates. Maximal degree in co-relation 30730. Up to 952 conditions per place. [2024-01-27 15:29:41,511 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 253 selfloop transitions, 163 changer transitions 23/442 dead transitions. [2024-01-27 15:29:41,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 442 transitions, 9098 flow [2024-01-27 15:29:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:29:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:29:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 289 transitions. [2024-01-27 15:29:41,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3590062111801242 [2024-01-27 15:29:41,513 INFO L175 Difference]: Start difference. First operand has 304 places, 281 transitions, 6480 flow. Second operand 23 states and 289 transitions. [2024-01-27 15:29:41,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 442 transitions, 9098 flow [2024-01-27 15:29:41,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 442 transitions, 9000 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-01-27 15:29:41,665 INFO L231 Difference]: Finished difference. Result has 323 places, 315 transitions, 7696 flow [2024-01-27 15:29:41,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7696, PETRI_PLACES=323, PETRI_TRANSITIONS=315} [2024-01-27 15:29:41,665 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 292 predicate places. [2024-01-27 15:29:41,665 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 315 transitions, 7696 flow [2024-01-27 15:29:41,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:41,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:41,666 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:41,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:41,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-27 15:29:41,880 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:41,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -699633902, now seen corresponding path program 41 times [2024-01-27 15:29:41,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:41,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202911905] [2024-01-27 15:29:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:45,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:45,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202911905] [2024-01-27 15:29:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202911905] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:45,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346639869] [2024-01-27 15:29:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:45,048 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:45,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-27 15:29:45,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:29:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:45,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 65 conjunts are in the unsatisfiable core [2024-01-27 15:29:45,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:47,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:47,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 268 [2024-01-27 15:29:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:47,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:50,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:50,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 432 treesize of output 441 [2024-01-27 15:29:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346639869] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:51,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:51,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-01-27 15:29:51,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165254015] [2024-01-27 15:29:51,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:51,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:29:51,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:51,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:29:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:29:51,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:29:51,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 315 transitions, 7696 flow. Second operand has 27 states, 27 states have (on average 7.518518518518518) internal successors, (203), 27 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:51,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:51,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:29:51,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:56,564 INFO L124 PetriNetUnfolderBase]: 2843/5553 cut-off events. [2024-01-27 15:29:56,564 INFO L125 PetriNetUnfolderBase]: For 108683/108683 co-relation queries the response was YES. [2024-01-27 15:29:56,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33984 conditions, 5553 events. 2843/5553 cut-off events. For 108683/108683 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43793 event pairs, 955 based on Foata normal form. 4/5551 useless extension candidates. Maximal degree in co-relation 33928. Up to 2546 conditions per place. [2024-01-27 15:29:56,613 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 276 selfloop transitions, 163 changer transitions 40/482 dead transitions. [2024-01-27 15:29:56,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 482 transitions, 9885 flow [2024-01-27 15:29:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:29:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:29:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 347 transitions. [2024-01-27 15:29:56,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671957671957672 [2024-01-27 15:29:56,615 INFO L175 Difference]: Start difference. First operand has 323 places, 315 transitions, 7696 flow. Second operand 27 states and 347 transitions. [2024-01-27 15:29:56,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 482 transitions, 9885 flow [2024-01-27 15:29:56,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 482 transitions, 9662 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-01-27 15:29:56,857 INFO L231 Difference]: Finished difference. Result has 347 places, 340 transitions, 8565 flow [2024-01-27 15:29:56,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8565, PETRI_PLACES=347, PETRI_TRANSITIONS=340} [2024-01-27 15:29:56,858 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 316 predicate places. [2024-01-27 15:29:56,858 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 340 transitions, 8565 flow [2024-01-27 15:29:56,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.518518518518518) internal successors, (203), 27 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:56,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:56,859 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:56,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-27 15:29:57,077 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:57,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -926024782, now seen corresponding path program 42 times [2024-01-27 15:29:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886975024] [2024-01-27 15:29:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:57,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:00,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:00,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886975024] [2024-01-27 15:30:00,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886975024] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:00,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928220639] [2024-01-27 15:30:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:30:00,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:00,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:00,495 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:00,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-27 15:30:01,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:30:01,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:01,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2024-01-27 15:30:01,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:02,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:02,364 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 374 treesize of output 306 [2024-01-27 15:30:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:03,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:05,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:05,676 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 454 treesize of output 414 [2024-01-27 15:30:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928220639] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:06,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:06,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-01-27 15:30:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729561741] [2024-01-27 15:30:06,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:30:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:30:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:30:06,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:30:06,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 340 transitions, 8565 flow. Second operand has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:06,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:06,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:30:06,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:11,788 INFO L124 PetriNetUnfolderBase]: 3363/6605 cut-off events. [2024-01-27 15:30:11,788 INFO L125 PetriNetUnfolderBase]: For 140887/140887 co-relation queries the response was YES. [2024-01-27 15:30:11,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40815 conditions, 6605 events. 3363/6605 cut-off events. For 140887/140887 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 52934 event pairs, 909 based on Foata normal form. 23/6624 useless extension candidates. Maximal degree in co-relation 40752. Up to 1948 conditions per place. [2024-01-27 15:30:11,843 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 318 selfloop transitions, 200 changer transitions 72/593 dead transitions. [2024-01-27 15:30:11,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 593 transitions, 12160 flow [2024-01-27 15:30:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:30:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:30:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 492 transitions. [2024-01-27 15:30:11,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36043956043956044 [2024-01-27 15:30:11,845 INFO L175 Difference]: Start difference. First operand has 347 places, 340 transitions, 8565 flow. Second operand 39 states and 492 transitions. [2024-01-27 15:30:11,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 593 transitions, 12160 flow [2024-01-27 15:30:12,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 593 transitions, 11751 flow, removed 82 selfloop flow, removed 13 redundant places. [2024-01-27 15:30:12,143 INFO L231 Difference]: Finished difference. Result has 385 places, 388 transitions, 9997 flow [2024-01-27 15:30:12,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9997, PETRI_PLACES=385, PETRI_TRANSITIONS=388} [2024-01-27 15:30:12,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 354 predicate places. [2024-01-27 15:30:12,144 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 388 transitions, 9997 flow [2024-01-27 15:30:12,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:12,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:12,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:12,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:12,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:12,362 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:12,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash 672323992, now seen corresponding path program 43 times [2024-01-27 15:30:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704617679] [2024-01-27 15:30:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:15,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704617679] [2024-01-27 15:30:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704617679] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851400771] [2024-01-27 15:30:15,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:30:15,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:15,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:15,529 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:15,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-27 15:30:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:16,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:30:16,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:16,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:16,924 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 356 treesize of output 278 [2024-01-27 15:30:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:17,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:19,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:19,600 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 378 treesize of output 356 [2024-01-27 15:30:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851400771] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:20,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2024-01-27 15:30:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383553065] [2024-01-27 15:30:20,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:30:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:30:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:30:20,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:30:20,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 388 transitions, 9997 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:20,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:20,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:30:20,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:23,416 INFO L124 PetriNetUnfolderBase]: 3391/6646 cut-off events. [2024-01-27 15:30:23,416 INFO L125 PetriNetUnfolderBase]: For 147241/147241 co-relation queries the response was YES. [2024-01-27 15:30:23,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41982 conditions, 6646 events. 3391/6646 cut-off events. For 147241/147241 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 53360 event pairs, 1069 based on Foata normal form. 4/6644 useless extension candidates. Maximal degree in co-relation 41906. Up to 2518 conditions per place. [2024-01-27 15:30:23,488 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 296 selfloop transitions, 176 changer transitions 26/501 dead transitions. [2024-01-27 15:30:23,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 501 transitions, 11982 flow [2024-01-27 15:30:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:30:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:30:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 272 transitions. [2024-01-27 15:30:23,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35324675324675325 [2024-01-27 15:30:23,489 INFO L175 Difference]: Start difference. First operand has 385 places, 388 transitions, 9997 flow. Second operand 22 states and 272 transitions. [2024-01-27 15:30:23,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 501 transitions, 11982 flow [2024-01-27 15:30:23,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 501 transitions, 11492 flow, removed 207 selfloop flow, removed 19 redundant places. [2024-01-27 15:30:23,902 INFO L231 Difference]: Finished difference. Result has 386 places, 403 transitions, 10325 flow [2024-01-27 15:30:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10325, PETRI_PLACES=386, PETRI_TRANSITIONS=403} [2024-01-27 15:30:23,903 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 355 predicate places. [2024-01-27 15:30:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 403 transitions, 10325 flow [2024-01-27 15:30:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:23,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:23,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:23,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:24,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:24,121 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:24,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1418965292, now seen corresponding path program 44 times [2024-01-27 15:30:24,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:24,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435741868] [2024-01-27 15:30:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:24,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435741868] [2024-01-27 15:30:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435741868] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336224201] [2024-01-27 15:30:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:30:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:27,675 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:27,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-27 15:30:28,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:30:28,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:28,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 60 conjunts are in the unsatisfiable core [2024-01-27 15:30:28,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:29,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:29,581 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 325 treesize of output 269 [2024-01-27 15:30:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:30,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:32,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:32,589 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 416 treesize of output 395 [2024-01-27 15:30:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:33,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336224201] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:33,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:33,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:30:33,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329748093] [2024-01-27 15:30:33,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:33,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:30:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:30:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:30:33,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:30:33,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 403 transitions, 10325 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:33,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:33,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:30:33,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:38,208 INFO L124 PetriNetUnfolderBase]: 3651/7217 cut-off events. [2024-01-27 15:30:38,209 INFO L125 PetriNetUnfolderBase]: For 162355/162355 co-relation queries the response was YES. [2024-01-27 15:30:38,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44810 conditions, 7217 events. 3651/7217 cut-off events. For 162355/162355 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 58854 event pairs, 1055 based on Foata normal form. 4/7213 useless extension candidates. Maximal degree in co-relation 44736. Up to 2602 conditions per place. [2024-01-27 15:30:38,278 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 348 selfloop transitions, 191 changer transitions 46/588 dead transitions. [2024-01-27 15:30:38,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 588 transitions, 12801 flow [2024-01-27 15:30:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:30:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:30:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 421 transitions. [2024-01-27 15:30:38,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3436734693877551 [2024-01-27 15:30:38,279 INFO L175 Difference]: Start difference. First operand has 386 places, 403 transitions, 10325 flow. Second operand 35 states and 421 transitions. [2024-01-27 15:30:38,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 588 transitions, 12801 flow [2024-01-27 15:30:38,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 588 transitions, 12648 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-01-27 15:30:38,686 INFO L231 Difference]: Finished difference. Result has 420 places, 427 transitions, 11215 flow [2024-01-27 15:30:38,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=10172, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11215, PETRI_PLACES=420, PETRI_TRANSITIONS=427} [2024-01-27 15:30:38,687 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 389 predicate places. [2024-01-27 15:30:38,687 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 427 transitions, 11215 flow [2024-01-27 15:30:38,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:38,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:38,688 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:38,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:38,902 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash 725808780, now seen corresponding path program 45 times [2024-01-27 15:30:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54678677] [2024-01-27 15:30:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:42,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54678677] [2024-01-27 15:30:42,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54678677] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:42,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124892784] [2024-01-27 15:30:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:30:42,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:42,421 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:42,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-27 15:30:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:30:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:42,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:30:42,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:44,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:44,146 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 333 treesize of output 273 [2024-01-27 15:30:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:44,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:46,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:46,686 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 417 treesize of output 395 [2024-01-27 15:30:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124892784] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:47,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:47,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:30:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184231263] [2024-01-27 15:30:47,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:30:47,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:30:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:30:47,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:30:47,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 427 transitions, 11215 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:47,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:47,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:30:47,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:52,248 INFO L124 PetriNetUnfolderBase]: 4153/8210 cut-off events. [2024-01-27 15:30:52,248 INFO L125 PetriNetUnfolderBase]: For 205915/205915 co-relation queries the response was YES. [2024-01-27 15:30:52,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52484 conditions, 8210 events. 4153/8210 cut-off events. For 205915/205915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 68110 event pairs, 1507 based on Foata normal form. 3/8199 useless extension candidates. Maximal degree in co-relation 52399. Up to 3100 conditions per place. [2024-01-27 15:30:52,325 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 408 selfloop transitions, 173 changer transitions 41/625 dead transitions. [2024-01-27 15:30:52,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 625 transitions, 14719 flow [2024-01-27 15:30:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:30:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:30:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 406 transitions. [2024-01-27 15:30:52,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3314285714285714 [2024-01-27 15:30:52,327 INFO L175 Difference]: Start difference. First operand has 420 places, 427 transitions, 11215 flow. Second operand 35 states and 406 transitions. [2024-01-27 15:30:52,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 625 transitions, 14719 flow [2024-01-27 15:30:52,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 625 transitions, 14335 flow, removed 85 selfloop flow, removed 18 redundant places. [2024-01-27 15:30:52,797 INFO L231 Difference]: Finished difference. Result has 446 places, 476 transitions, 12801 flow [2024-01-27 15:30:52,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=10870, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12801, PETRI_PLACES=446, PETRI_TRANSITIONS=476} [2024-01-27 15:30:52,797 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 415 predicate places. [2024-01-27 15:30:52,798 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 476 transitions, 12801 flow [2024-01-27 15:30:52,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:52,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:52,798 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:52,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:53,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-01-27 15:30:53,001 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:53,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash -943502878, now seen corresponding path program 46 times [2024-01-27 15:30:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:53,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064268229] [2024-01-27 15:30:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:53,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064268229] [2024-01-27 15:30:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064268229] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714508993] [2024-01-27 15:30:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:30:56,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:56,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:56,188 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) [2024-01-27 15:30:56,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-01-27 15:30:56,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:30:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:56,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:30:56,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:58,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:58,046 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 369 treesize of output 301 [2024-01-27 15:30:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:58,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:01,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:01,358 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 439 treesize of output 405 [2024-01-27 15:31:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:02,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714508993] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:02,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 30 [2024-01-27 15:31:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967808158] [2024-01-27 15:31:02,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:31:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:31:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:31:02,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:31:02,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 476 transitions, 12801 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:02,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:02,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:31:02,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:07,751 INFO L124 PetriNetUnfolderBase]: 4669/9240 cut-off events. [2024-01-27 15:31:07,752 INFO L125 PetriNetUnfolderBase]: For 264033/264033 co-relation queries the response was YES. [2024-01-27 15:31:07,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60575 conditions, 9240 events. 4669/9240 cut-off events. For 264033/264033 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 77743 event pairs, 1607 based on Foata normal form. 21/9249 useless extension candidates. Maximal degree in co-relation 60480. Up to 3358 conditions per place. [2024-01-27 15:31:07,867 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 431 selfloop transitions, 213 changer transitions 51/698 dead transitions. [2024-01-27 15:31:07,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 698 transitions, 17204 flow [2024-01-27 15:31:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 15:31:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 15:31:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 414 transitions. [2024-01-27 15:31:07,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35844155844155845 [2024-01-27 15:31:07,873 INFO L175 Difference]: Start difference. First operand has 446 places, 476 transitions, 12801 flow. Second operand 33 states and 414 transitions. [2024-01-27 15:31:07,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 698 transitions, 17204 flow [2024-01-27 15:31:08,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 698 transitions, 16721 flow, removed 201 selfloop flow, removed 14 redundant places. [2024-01-27 15:31:08,974 INFO L231 Difference]: Finished difference. Result has 472 places, 528 transitions, 14604 flow [2024-01-27 15:31:08,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12368, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14604, PETRI_PLACES=472, PETRI_TRANSITIONS=528} [2024-01-27 15:31:08,975 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 441 predicate places. [2024-01-27 15:31:08,976 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 528 transitions, 14604 flow [2024-01-27 15:31:08,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:08,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:08,976 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:08,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:09,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-01-27 15:31:09,188 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:09,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1876210168, now seen corresponding path program 47 times [2024-01-27 15:31:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022379101] [2024-01-27 15:31:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022379101] [2024-01-27 15:31:12,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022379101] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:12,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939486230] [2024-01-27 15:31:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:31:12,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:12,865 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) [2024-01-27 15:31:12,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-01-27 15:31:13,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:31:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:13,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 63 conjunts are in the unsatisfiable core [2024-01-27 15:31:13,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:15,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:15,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 356 treesize of output 294 [2024-01-27 15:31:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:15,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:18,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:18,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 432 treesize of output 441 [2024-01-27 15:31:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:20,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939486230] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:20,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:20,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-01-27 15:31:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378492867] [2024-01-27 15:31:20,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:20,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:31:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:31:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:31:20,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:31:20,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 528 transitions, 14604 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:20,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:20,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:31:20,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:28,664 INFO L124 PetriNetUnfolderBase]: 4981/9930 cut-off events. [2024-01-27 15:31:28,665 INFO L125 PetriNetUnfolderBase]: For 304935/304935 co-relation queries the response was YES. [2024-01-27 15:31:28,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65825 conditions, 9930 events. 4981/9930 cut-off events. For 304935/304935 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 84779 event pairs, 841 based on Foata normal form. 3/9901 useless extension candidates. Maximal degree in co-relation 65722. Up to 2418 conditions per place. [2024-01-27 15:31:28,779 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 350 selfloop transitions, 352 changer transitions 42/747 dead transitions. [2024-01-27 15:31:28,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 747 transitions, 18441 flow [2024-01-27 15:31:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-27 15:31:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-27 15:31:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 475 transitions. [2024-01-27 15:31:28,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3310104529616725 [2024-01-27 15:31:28,781 INFO L175 Difference]: Start difference. First operand has 472 places, 528 transitions, 14604 flow. Second operand 41 states and 475 transitions. [2024-01-27 15:31:28,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 747 transitions, 18441 flow [2024-01-27 15:31:29,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 747 transitions, 17830 flow, removed 277 selfloop flow, removed 15 redundant places. [2024-01-27 15:31:29,966 INFO L231 Difference]: Finished difference. Result has 503 places, 573 transitions, 16628 flow [2024-01-27 15:31:29,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14091, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=16628, PETRI_PLACES=503, PETRI_TRANSITIONS=573} [2024-01-27 15:31:29,967 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 472 predicate places. [2024-01-27 15:31:29,967 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 573 transitions, 16628 flow [2024-01-27 15:31:29,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:29,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:29,968 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:29,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:30,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:30,183 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:30,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -882409398, now seen corresponding path program 48 times [2024-01-27 15:31:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:30,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719311160] [2024-01-27 15:31:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719311160] [2024-01-27 15:31:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719311160] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198400085] [2024-01-27 15:31:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:31:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:33,746 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) [2024-01-27 15:31:33,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-01-27 15:31:34,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:31:34,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:34,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2024-01-27 15:31:34,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:35,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:35,783 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 326 treesize of output 274 [2024-01-27 15:31:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:36,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:38,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:38,725 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 464 treesize of output 412 [2024-01-27 15:31:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198400085] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:40,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-01-27 15:31:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778561500] [2024-01-27 15:31:40,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:40,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:31:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:31:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:31:40,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:31:40,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 573 transitions, 16628 flow. Second operand has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:40,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:40,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:31:40,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:45,308 INFO L124 PetriNetUnfolderBase]: 4991/9936 cut-off events. [2024-01-27 15:31:45,309 INFO L125 PetriNetUnfolderBase]: For 330114/330114 co-relation queries the response was YES. [2024-01-27 15:31:45,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67263 conditions, 9936 events. 4991/9936 cut-off events. For 330114/330114 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 84884 event pairs, 1761 based on Foata normal form. 9/9937 useless extension candidates. Maximal degree in co-relation 67154. Up to 3842 conditions per place. [2024-01-27 15:31:45,446 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 462 selfloop transitions, 208 changer transitions 35/708 dead transitions. [2024-01-27 15:31:45,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 708 transitions, 18897 flow [2024-01-27 15:31:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:31:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:31:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 360 transitions. [2024-01-27 15:31:45,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35467980295566504 [2024-01-27 15:31:45,448 INFO L175 Difference]: Start difference. First operand has 503 places, 573 transitions, 16628 flow. Second operand 29 states and 360 transitions. [2024-01-27 15:31:45,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 708 transitions, 18897 flow [2024-01-27 15:31:46,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 708 transitions, 18421 flow, removed 188 selfloop flow, removed 20 redundant places. [2024-01-27 15:31:46,535 INFO L231 Difference]: Finished difference. Result has 512 places, 572 transitions, 16585 flow [2024-01-27 15:31:46,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=16100, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16585, PETRI_PLACES=512, PETRI_TRANSITIONS=572} [2024-01-27 15:31:46,536 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 481 predicate places. [2024-01-27 15:31:46,536 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 572 transitions, 16585 flow [2024-01-27 15:31:46,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:46,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:46,536 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:46,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-01-27 15:31:46,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-27 15:31:46,750 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:46,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash -401744202, now seen corresponding path program 49 times [2024-01-27 15:31:46,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:46,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165786342] [2024-01-27 15:31:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:46,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:50,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:50,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165786342] [2024-01-27 15:31:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165786342] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:50,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009663121] [2024-01-27 15:31:50,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:31:50,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:50,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:50,464 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) [2024-01-27 15:31:50,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-01-27 15:31:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:51,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-27 15:31:51,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:52,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:52,545 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 319 treesize of output 247 [2024-01-27 15:31:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:53,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:55,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:55,409 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 402 treesize of output 381 [2024-01-27 15:31:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:56,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009663121] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:56,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2024-01-27 15:31:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531829429] [2024-01-27 15:31:56,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:56,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:31:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:31:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:31:56,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:31:56,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 572 transitions, 16585 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:56,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:56,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:31:56,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:02,577 INFO L124 PetriNetUnfolderBase]: 5233/10390 cut-off events. [2024-01-27 15:32:02,577 INFO L125 PetriNetUnfolderBase]: For 360873/360873 co-relation queries the response was YES. [2024-01-27 15:32:02,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70949 conditions, 10390 events. 5233/10390 cut-off events. For 360873/360873 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 89223 event pairs, 1797 based on Foata normal form. 5/10367 useless extension candidates. Maximal degree in co-relation 70839. Up to 4136 conditions per place. [2024-01-27 15:32:02,712 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 481 selfloop transitions, 234 changer transitions 32/750 dead transitions. [2024-01-27 15:32:02,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 750 transitions, 19963 flow [2024-01-27 15:32:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:32:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:32:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 389 transitions. [2024-01-27 15:32:02,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34732142857142856 [2024-01-27 15:32:02,714 INFO L175 Difference]: Start difference. First operand has 512 places, 572 transitions, 16585 flow. Second operand 32 states and 389 transitions. [2024-01-27 15:32:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 750 transitions, 19963 flow [2024-01-27 15:32:03,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 750 transitions, 19611 flow, removed 109 selfloop flow, removed 15 redundant places. [2024-01-27 15:32:03,904 INFO L231 Difference]: Finished difference. Result has 534 places, 607 transitions, 18089 flow [2024-01-27 15:32:03,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=16263, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18089, PETRI_PLACES=534, PETRI_TRANSITIONS=607} [2024-01-27 15:32:03,905 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 503 predicate places. [2024-01-27 15:32:03,905 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 607 transitions, 18089 flow [2024-01-27 15:32:03,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:03,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:03,920 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:03,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-01-27 15:32:04,121 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash 620904968, now seen corresponding path program 50 times [2024-01-27 15:32:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793190368] [2024-01-27 15:32:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793190368] [2024-01-27 15:32:07,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793190368] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120093776] [2024-01-27 15:32:07,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:32:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:07,746 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) [2024-01-27 15:32:07,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-01-27 15:32:08,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:32:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:08,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:32:08,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:09,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:09,423 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 324 treesize of output 272 [2024-01-27 15:32:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:10,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:12,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:12,270 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 384 treesize of output 362 [2024-01-27 15:32:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:13,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120093776] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:13,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:13,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:32:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480004091] [2024-01-27 15:32:13,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:32:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:32:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:32:13,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:32:13,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 607 transitions, 18089 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:13,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:13,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:32:13,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:19,643 INFO L124 PetriNetUnfolderBase]: 5635/11221 cut-off events. [2024-01-27 15:32:19,644 INFO L125 PetriNetUnfolderBase]: For 413950/413950 co-relation queries the response was YES. [2024-01-27 15:32:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77849 conditions, 11221 events. 5635/11221 cut-off events. For 413950/413950 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 98065 event pairs, 2133 based on Foata normal form. 6/11191 useless extension candidates. Maximal degree in co-relation 77732. Up to 5152 conditions per place. [2024-01-27 15:32:19,782 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 556 selfloop transitions, 215 changer transitions 58/832 dead transitions. [2024-01-27 15:32:19,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 832 transitions, 22459 flow [2024-01-27 15:32:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 15:32:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 15:32:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 462 transitions. [2024-01-27 15:32:19,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-01-27 15:32:19,783 INFO L175 Difference]: Start difference. First operand has 534 places, 607 transitions, 18089 flow. Second operand 40 states and 462 transitions. [2024-01-27 15:32:19,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 832 transitions, 22459 flow [2024-01-27 15:32:21,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 832 transitions, 21868 flow, removed 253 selfloop flow, removed 17 redundant places. [2024-01-27 15:32:21,256 INFO L231 Difference]: Finished difference. Result has 569 places, 648 transitions, 19570 flow [2024-01-27 15:32:21,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=17583, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19570, PETRI_PLACES=569, PETRI_TRANSITIONS=648} [2024-01-27 15:32:21,257 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 538 predicate places. [2024-01-27 15:32:21,257 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 648 transitions, 19570 flow [2024-01-27 15:32:21,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:21,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:21,257 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:21,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:21,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:21,472 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:21,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash 779185522, now seen corresponding path program 51 times [2024-01-27 15:32:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:21,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690589461] [2024-01-27 15:32:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:24,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690589461] [2024-01-27 15:32:24,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690589461] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:24,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495420304] [2024-01-27 15:32:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:32:24,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:24,904 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) [2024-01-27 15:32:24,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-01-27 15:32:25,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:32:25,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:25,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 60 conjunts are in the unsatisfiable core [2024-01-27 15:32:25,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:26,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:26,939 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 322 treesize of output 266 [2024-01-27 15:32:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:27,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:29,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:29,770 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 411 treesize of output 389 [2024-01-27 15:32:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:31,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495420304] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:31,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:31,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:32:31,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137672697] [2024-01-27 15:32:31,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:31,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:32:31,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:32:31,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:32:31,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:32:31,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 648 transitions, 19570 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:31,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:31,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:32:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:37,943 INFO L124 PetriNetUnfolderBase]: 6037/12020 cut-off events. [2024-01-27 15:32:37,944 INFO L125 PetriNetUnfolderBase]: For 471469/471469 co-relation queries the response was YES. [2024-01-27 15:32:38,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85008 conditions, 12020 events. 6037/12020 cut-off events. For 471469/471469 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 106142 event pairs, 2247 based on Foata normal form. 6/11990 useless extension candidates. Maximal degree in co-relation 84881. Up to 5470 conditions per place. [2024-01-27 15:32:38,120 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 598 selfloop transitions, 238 changer transitions 44/883 dead transitions. [2024-01-27 15:32:38,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 883 transitions, 24720 flow [2024-01-27 15:32:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:32:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:32:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 440 transitions. [2024-01-27 15:32:38,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697478991596639 [2024-01-27 15:32:38,121 INFO L175 Difference]: Start difference. First operand has 569 places, 648 transitions, 19570 flow. Second operand 34 states and 440 transitions. [2024-01-27 15:32:38,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 883 transitions, 24720 flow [2024-01-27 15:32:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 883 transitions, 24105 flow, removed 279 selfloop flow, removed 13 redundant places. [2024-01-27 15:32:40,032 INFO L231 Difference]: Finished difference. Result has 593 places, 693 transitions, 21400 flow [2024-01-27 15:32:40,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=19009, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21400, PETRI_PLACES=593, PETRI_TRANSITIONS=693} [2024-01-27 15:32:40,033 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 562 predicate places. [2024-01-27 15:32:40,034 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 693 transitions, 21400 flow [2024-01-27 15:32:40,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:40,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:40,034 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:40,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-01-27 15:32:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:40,236 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 222674526, now seen corresponding path program 52 times [2024-01-27 15:32:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167665939] [2024-01-27 15:32:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:43,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:43,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167665939] [2024-01-27 15:32:43,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167665939] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:43,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552810976] [2024-01-27 15:32:43,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:32:43,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:43,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:43,895 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) [2024-01-27 15:32:43,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-01-27 15:32:44,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:32:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:44,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:32:44,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:45,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:45,545 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 326 treesize of output 274 [2024-01-27 15:32:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:46,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:48,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:48,098 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 378 treesize of output 356 [2024-01-27 15:32:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:48,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552810976] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:48,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:48,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:32:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334946387] [2024-01-27 15:32:48,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:32:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:32:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:32:48,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:32:48,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 693 transitions, 21400 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:48,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:48,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:32:48,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:54,712 INFO L124 PetriNetUnfolderBase]: 6277/12530 cut-off events. [2024-01-27 15:32:54,712 INFO L125 PetriNetUnfolderBase]: For 509828/509828 co-relation queries the response was YES. [2024-01-27 15:32:54,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89367 conditions, 12530 events. 6277/12530 cut-off events. For 509828/509828 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 111856 event pairs, 2449 based on Foata normal form. 4/12526 useless extension candidates. Maximal degree in co-relation 89237. Up to 5772 conditions per place. [2024-01-27 15:32:54,881 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 587 selfloop transitions, 229 changer transitions 33/852 dead transitions. [2024-01-27 15:32:54,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 852 transitions, 25355 flow [2024-01-27 15:32:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:32:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:32:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 310 transitions. [2024-01-27 15:32:54,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-01-27 15:32:54,882 INFO L175 Difference]: Start difference. First operand has 593 places, 693 transitions, 21400 flow. Second operand 24 states and 310 transitions. [2024-01-27 15:32:54,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 852 transitions, 25355 flow [2024-01-27 15:32:56,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 852 transitions, 24643 flow, removed 320 selfloop flow, removed 12 redundant places. [2024-01-27 15:32:56,993 INFO L231 Difference]: Finished difference. Result has 610 places, 718 transitions, 22244 flow [2024-01-27 15:32:56,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=20704, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=22244, PETRI_PLACES=610, PETRI_TRANSITIONS=718} [2024-01-27 15:32:56,995 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 579 predicate places. [2024-01-27 15:32:56,995 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 718 transitions, 22244 flow [2024-01-27 15:32:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:56,996 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:57,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-01-27 15:32:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-01-27 15:32:57,208 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:57,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1550082718, now seen corresponding path program 53 times [2024-01-27 15:32:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269696274] [2024-01-27 15:32:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:00,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269696274] [2024-01-27 15:33:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269696274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384214464] [2024-01-27 15:33:00,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:33:00,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:00,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:00,579 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) [2024-01-27 15:33:00,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-01-27 15:33:01,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:33:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:01,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 65 conjunts are in the unsatisfiable core [2024-01-27 15:33:01,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:02,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:02,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 353 treesize of output 297 [2024-01-27 15:33:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:03,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:08,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:08,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 449 treesize of output 483 [2024-01-27 15:33:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:08,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384214464] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:08,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:08,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-01-27 15:33:08,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67787814] [2024-01-27 15:33:08,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:08,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:33:08,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:33:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:33:08,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:33:08,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 718 transitions, 22244 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:08,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:08,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:33:08,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:18,659 INFO L124 PetriNetUnfolderBase]: 6489/13023 cut-off events. [2024-01-27 15:33:18,659 INFO L125 PetriNetUnfolderBase]: For 545174/545174 co-relation queries the response was YES. [2024-01-27 15:33:18,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93430 conditions, 13023 events. 6489/13023 cut-off events. For 545174/545174 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 117135 event pairs, 1239 based on Foata normal form. 4/13019 useless extension candidates. Maximal degree in co-relation 93294. Up to 3216 conditions per place. [2024-01-27 15:33:18,848 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 468 selfloop transitions, 406 changer transitions 30/907 dead transitions. [2024-01-27 15:33:18,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 907 transitions, 26794 flow [2024-01-27 15:33:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:33:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:33:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 370 transitions. [2024-01-27 15:33:18,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645320197044335 [2024-01-27 15:33:18,849 INFO L175 Difference]: Start difference. First operand has 610 places, 718 transitions, 22244 flow. Second operand 29 states and 370 transitions. [2024-01-27 15:33:18,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 907 transitions, 26794 flow [2024-01-27 15:33:21,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 907 transitions, 26368 flow, removed 182 selfloop flow, removed 10 redundant places. [2024-01-27 15:33:21,224 INFO L231 Difference]: Finished difference. Result has 633 places, 752 transitions, 24258 flow [2024-01-27 15:33:21,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21824, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=24258, PETRI_PLACES=633, PETRI_TRANSITIONS=752} [2024-01-27 15:33:21,225 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 602 predicate places. [2024-01-27 15:33:21,226 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 752 transitions, 24258 flow [2024-01-27 15:33:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:21,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:21,226 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:21,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:21,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:21,429 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:21,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 108871184, now seen corresponding path program 54 times [2024-01-27 15:33:21,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:21,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131427077] [2024-01-27 15:33:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:21,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:24,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:24,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131427077] [2024-01-27 15:33:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131427077] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389155015] [2024-01-27 15:33:24,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:33:24,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:24,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:24,832 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) [2024-01-27 15:33:24,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-01-27 15:33:25,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:33:25,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:25,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:33:25,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:26,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:26,899 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 315 treesize of output 263 [2024-01-27 15:33:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:27,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:29,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:29,152 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 422 treesize of output 401 [2024-01-27 15:33:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389155015] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:30,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:33:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445749500] [2024-01-27 15:33:30,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:30,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:33:30,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:33:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:33:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:33:30,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 752 transitions, 24258 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:30,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:30,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:33:30,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:39,723 INFO L124 PetriNetUnfolderBase]: 7087/14144 cut-off events. [2024-01-27 15:33:39,724 INFO L125 PetriNetUnfolderBase]: For 654177/654177 co-relation queries the response was YES. [2024-01-27 15:33:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105217 conditions, 14144 events. 7087/14144 cut-off events. For 654177/654177 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 129018 event pairs, 2879 based on Foata normal form. 3/14111 useless extension candidates. Maximal degree in co-relation 105076. Up to 5970 conditions per place. [2024-01-27 15:33:39,983 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 707 selfloop transitions, 222 changer transitions 42/974 dead transitions. [2024-01-27 15:33:39,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 974 transitions, 29704 flow [2024-01-27 15:33:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:33:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:33:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 416 transitions. [2024-01-27 15:33:39,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495798319327731 [2024-01-27 15:33:39,985 INFO L175 Difference]: Start difference. First operand has 633 places, 752 transitions, 24258 flow. Second operand 34 states and 416 transitions. [2024-01-27 15:33:39,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 974 transitions, 29704 flow [2024-01-27 15:33:43,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 974 transitions, 28904 flow, removed 359 selfloop flow, removed 12 redundant places. [2024-01-27 15:33:43,947 INFO L231 Difference]: Finished difference. Result has 664 places, 804 transitions, 26351 flow [2024-01-27 15:33:43,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=23628, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26351, PETRI_PLACES=664, PETRI_TRANSITIONS=804} [2024-01-27 15:33:43,959 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 633 predicate places. [2024-01-27 15:33:43,960 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 804 transitions, 26351 flow [2024-01-27 15:33:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:43,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:43,960 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:43,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:44,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-01-27 15:33:44,175 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:44,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1002128290, now seen corresponding path program 55 times [2024-01-27 15:33:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032240738] [2024-01-27 15:33:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032240738] [2024-01-27 15:33:47,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032240738] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297900777] [2024-01-27 15:33:47,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:33:47,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:47,884 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) [2024-01-27 15:33:47,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-01-27 15:33:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:48,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:33:48,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:49,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:49,955 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 319 treesize of output 247 [2024-01-27 15:33:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:50,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:52,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:52,975 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 410 treesize of output 389 [2024-01-27 15:33:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:33:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297900777] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:54,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:54,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2024-01-27 15:33:54,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035385928] [2024-01-27 15:33:54,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:33:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:33:54,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:33:54,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:33:54,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 804 transitions, 26351 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:54,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:54,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:33:54,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:04,557 INFO L124 PetriNetUnfolderBase]: 7183/14393 cut-off events. [2024-01-27 15:34:04,557 INFO L125 PetriNetUnfolderBase]: For 663440/663440 co-relation queries the response was YES. [2024-01-27 15:34:04,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106366 conditions, 14393 events. 7183/14393 cut-off events. For 663440/663440 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 131690 event pairs, 2887 based on Foata normal form. 6/14363 useless extension candidates. Maximal degree in co-relation 106217. Up to 5970 conditions per place. [2024-01-27 15:34:04,839 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 717 selfloop transitions, 220 changer transitions 27/967 dead transitions. [2024-01-27 15:34:04,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 967 transitions, 29594 flow [2024-01-27 15:34:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:34:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:34:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 374 transitions. [2024-01-27 15:34:04,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35619047619047617 [2024-01-27 15:34:04,841 INFO L175 Difference]: Start difference. First operand has 664 places, 804 transitions, 26351 flow. Second operand 30 states and 374 transitions. [2024-01-27 15:34:04,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 967 transitions, 29594 flow [2024-01-27 15:34:08,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 967 transitions, 28703 flow, removed 398 selfloop flow, removed 16 redundant places. [2024-01-27 15:34:08,827 INFO L231 Difference]: Finished difference. Result has 679 places, 813 transitions, 26414 flow [2024-01-27 15:34:08,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=25576, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26414, PETRI_PLACES=679, PETRI_TRANSITIONS=813} [2024-01-27 15:34:08,829 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 648 predicate places. [2024-01-27 15:34:08,829 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 813 transitions, 26414 flow [2024-01-27 15:34:08,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:08,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:08,829 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:08,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-01-27 15:34:09,042 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:09,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1277592866, now seen corresponding path program 56 times [2024-01-27 15:34:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776797963] [2024-01-27 15:34:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776797963] [2024-01-27 15:34:12,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776797963] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413619551] [2024-01-27 15:34:12,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:34:12,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:12,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:12,600 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) [2024-01-27 15:34:12,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-01-27 15:34:13,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:34:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:13,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:34:13,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:14,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:14,933 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 299 treesize of output 247 [2024-01-27 15:34:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:15,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:18,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:18,201 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 436 treesize of output 401 [2024-01-27 15:34:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413619551] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:19,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:19,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-27 15:34:19,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020253228] [2024-01-27 15:34:19,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:34:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:34:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:34:19,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:34:19,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 813 transitions, 26414 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:19,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:19,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:34:19,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:28,102 INFO L124 PetriNetUnfolderBase]: 7123/14314 cut-off events. [2024-01-27 15:34:28,103 INFO L125 PetriNetUnfolderBase]: For 638069/638069 co-relation queries the response was YES. [2024-01-27 15:34:28,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104336 conditions, 14314 events. 7123/14314 cut-off events. For 638069/638069 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 131154 event pairs, 3213 based on Foata normal form. 14/14292 useless extension candidates. Maximal degree in co-relation 104185. Up to 6822 conditions per place. [2024-01-27 15:34:28,311 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 701 selfloop transitions, 158 changer transitions 53/915 dead transitions. [2024-01-27 15:34:28,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 915 transitions, 28789 flow [2024-01-27 15:34:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:34:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:34:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 275 transitions. [2024-01-27 15:34:28,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416149068322981 [2024-01-27 15:34:28,313 INFO L175 Difference]: Start difference. First operand has 679 places, 813 transitions, 26414 flow. Second operand 23 states and 275 transitions. [2024-01-27 15:34:28,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 915 transitions, 28789 flow [2024-01-27 15:34:31,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 915 transitions, 28347 flow, removed 37 selfloop flow, removed 20 redundant places. [2024-01-27 15:34:31,313 INFO L231 Difference]: Finished difference. Result has 682 places, 805 transitions, 26063 flow [2024-01-27 15:34:31,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=25953, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26063, PETRI_PLACES=682, PETRI_TRANSITIONS=805} [2024-01-27 15:34:31,314 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 651 predicate places. [2024-01-27 15:34:31,314 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 805 transitions, 26063 flow [2024-01-27 15:34:31,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:31,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:31,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:31,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:31,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:31,524 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:31,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash -137301756, now seen corresponding path program 57 times [2024-01-27 15:34:31,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:31,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116179040] [2024-01-27 15:34:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:31,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:35,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:35,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116179040] [2024-01-27 15:34:35,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116179040] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:35,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726237230] [2024-01-27 15:34:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:34:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:35,430 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) [2024-01-27 15:34:35,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-01-27 15:34:36,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:34:36,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:36,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-27 15:34:36,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:37,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:37,786 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 325 treesize of output 269 [2024-01-27 15:34:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:38,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:40,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:40,644 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 448 treesize of output 413 [2024-01-27 15:34:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:42,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726237230] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:42,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:42,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-01-27 15:34:42,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153505906] [2024-01-27 15:34:42,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:42,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:34:42,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:34:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:34:42,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:34:42,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 805 transitions, 26063 flow. Second operand has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 27 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:42,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:42,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:34:42,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:49,143 INFO L124 PetriNetUnfolderBase]: 7155/14282 cut-off events. [2024-01-27 15:34:49,144 INFO L125 PetriNetUnfolderBase]: For 645181/645181 co-relation queries the response was YES. [2024-01-27 15:34:49,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104733 conditions, 14282 events. 7155/14282 cut-off events. For 645181/645181 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 130000 event pairs, 2769 based on Foata normal form. 1/14275 useless extension candidates. Maximal degree in co-relation 104582. Up to 5290 conditions per place. [2024-01-27 15:34:49,385 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 630 selfloop transitions, 248 changer transitions 24/905 dead transitions. [2024-01-27 15:34:49,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 905 transitions, 29207 flow [2024-01-27 15:34:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:34:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:34:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 236 transitions. [2024-01-27 15:34:49,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2024-01-27 15:34:49,386 INFO L175 Difference]: Start difference. First operand has 682 places, 805 transitions, 26063 flow. Second operand 20 states and 236 transitions. [2024-01-27 15:34:49,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 905 transitions, 29207 flow [2024-01-27 15:34:52,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 905 transitions, 28828 flow, removed 30 selfloop flow, removed 15 redundant places. [2024-01-27 15:34:52,326 INFO L231 Difference]: Finished difference. Result has 684 places, 818 transitions, 26733 flow [2024-01-27 15:34:52,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=25692, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=26733, PETRI_PLACES=684, PETRI_TRANSITIONS=818} [2024-01-27 15:34:52,327 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 653 predicate places. [2024-01-27 15:34:52,328 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 818 transitions, 26733 flow [2024-01-27 15:34:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 27 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:52,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:52,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:52,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-01-27 15:34:52,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:52,529 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:52,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2031779268, now seen corresponding path program 58 times [2024-01-27 15:34:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:52,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889324168] [2024-01-27 15:34:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:34:55,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:55,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889324168] [2024-01-27 15:34:55,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889324168] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:55,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45722684] [2024-01-27 15:34:55,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:34:55,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:55,969 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) [2024-01-27 15:34:55,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-01-27 15:34:56,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:34:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:56,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 56 conjunts are in the unsatisfiable core [2024-01-27 15:34:56,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:57,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:57,664 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 356 treesize of output 278 [2024-01-27 15:34:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:34:58,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:00,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:00,559 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 406 treesize of output 372 [2024-01-27 15:35:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:35:01,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45722684] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:01,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:01,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-01-27 15:35:01,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9855530] [2024-01-27 15:35:01,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:01,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:01,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:01,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:01,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:35:01,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 818 transitions, 26733 flow. Second operand has 29 states, 29 states have (on average 7.379310344827586) internal successors, (214), 29 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:01,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:01,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:35:01,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand