./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-2.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/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:57:48,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:57:48,708 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:57:48,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:57:48,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:57:48,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:57:48,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:57:48,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:57:48,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:57:48,747 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:57:48,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:57:48,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:57:48,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:57:48,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:57:48,749 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:57:48,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:57:48,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:57:48,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:57:48,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:57:48,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:57:48,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:57:48,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:57:48,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:57:48,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:57:48,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:57:48,753 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:57:48,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:57:48,753 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:57:48,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:57:48,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:57:48,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:57:48,755 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:57:48,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:57:48,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:57:48,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:57:48,756 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:57:48,756 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:57:48,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:57:48,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:57:48,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:57:48,757 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:57:48,757 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:57:48,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:57:48,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-01-27 15:57:49,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:57:49,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:57:49,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:57:49,053 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:57:49,053 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:57:49,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2024-01-27 15:57:50,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:57:50,464 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:57:50,465 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2024-01-27 15:57:50,475 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84fe7094/ae180500ad9a4e0c8af661f02ba21217/FLAG9e2688d4d [2024-01-27 15:57:50,489 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84fe7094/ae180500ad9a4e0c8af661f02ba21217 [2024-01-27 15:57:50,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:57:50,492 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:57:50,496 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:57:50,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:57:50,501 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:57:50,502 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457ab3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50, skipping insertion in model container [2024-01-27 15:57:50,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:57:50,770 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/unroll-cond-2.wvr.c[2500,2513] [2024-01-27 15:57:50,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:57:50,787 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:57:50,804 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/unroll-cond-2.wvr.c[2500,2513] [2024-01-27 15:57:50,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:57:50,819 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:57:50,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50 WrapperNode [2024-01-27 15:57:50,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:57:50,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:57:50,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:57:50,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:57:50,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,863 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 146 [2024-01-27 15:57:50,863 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:57:50,864 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:57:50,864 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:57:50,864 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:57:50,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,880 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,893 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 5, 2, 2]. 45 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:57:50,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,900 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,904 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:57:50,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:57:50,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:57:50,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:57:50,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (1/1) ... [2024-01-27 15:57:50,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:57:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:50,953 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 15:57:50,977 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 15:57:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:57:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:57:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:57:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:57:51,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:57:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:57:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:57:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:57:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:57:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:57:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:57:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:57:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:57:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:57:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:57:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:57:51,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:57:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:57:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:57:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:57:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:57:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:57:51,012 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 15:57:51,136 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:57:51,138 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:57:51,414 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:57:51,414 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:57:51,668 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:57:51,670 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:57:51,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:57:51 BoogieIcfgContainer [2024-01-27 15:57:51,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:57:51,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:57:51,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:57:51,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:57:51,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:57:50" (1/3) ... [2024-01-27 15:57:51,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711fbc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:57:51, skipping insertion in model container [2024-01-27 15:57:51,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:57:50" (2/3) ... [2024-01-27 15:57:51,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711fbc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:57:51, skipping insertion in model container [2024-01-27 15:57:51,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:57:51" (3/3) ... [2024-01-27 15:57:51,678 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-01-27 15:57:51,685 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:57:51,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:57:51,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:57:51,692 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:57:51,745 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:57:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:57:51,827 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:57:51,827 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:57:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:57:51,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:57:51,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:57:51,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:57:51,850 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;@2d77b275, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:57:51,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:57:51,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:57:51,869 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:57:51,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:57:51,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:51,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:51,871 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 15:57:51,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash 587578817, now seen corresponding path program 1 times [2024-01-27 15:57:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:51,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564451138] [2024-01-27 15:57:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:52,249 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 15:57:52,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:52,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564451138] [2024-01-27 15:57:52,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564451138] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:57:52,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:57:52,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:57:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054125448] [2024-01-27 15:57:52,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:57:52,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:57:52,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:57:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:57:52,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:52,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 15:57:52,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:52,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:52,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:52,385 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2024-01-27 15:57:52,386 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-01-27 15:57:52,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2024-01-27 15:57:52,390 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-27 15:57:52,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2024-01-27 15:57:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:57:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:57:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-27 15:57:52,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:57:52,405 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2024-01-27 15:57:52,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2024-01-27 15:57:52,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:57:52,410 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2024-01-27 15:57:52,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-01-27 15:57:52,415 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-27 15:57:52,416 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2024-01-27 15:57:52,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 15:57:52,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:52,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:52,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:57:52,417 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 15:57:52,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2041042086, now seen corresponding path program 1 times [2024-01-27 15:57:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607604838] [2024-01-27 15:57:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:57:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:52,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607604838] [2024-01-27 15:57:52,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607604838] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:57:52,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:57:52,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:57:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801329268] [2024-01-27 15:57:52,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:57:52,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:57:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:57:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:57:52,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:52,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 15:57:52,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:52,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:52,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:52,903 INFO L124 PetriNetUnfolderBase]: 74/137 cut-off events. [2024-01-27 15:57:52,903 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:57:52,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 137 events. 74/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 3 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 277. Up to 85 conditions per place. [2024-01-27 15:57:52,906 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 33 selfloop transitions, 11 changer transitions 2/47 dead transitions. [2024-01-27 15:57:52,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 47 transitions, 206 flow [2024-01-27 15:57:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:57:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:57:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-01-27 15:57:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-01-27 15:57:52,911 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 6 states and 65 transitions. [2024-01-27 15:57:52,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 47 transitions, 206 flow [2024-01-27 15:57:52,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 47 transitions, 202 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:57:52,916 INFO L231 Difference]: Finished difference. Result has 28 places, 29 transitions, 116 flow [2024-01-27 15:57:52,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=28, PETRI_TRANSITIONS=29} [2024-01-27 15:57:52,917 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-01-27 15:57:52,917 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 29 transitions, 116 flow [2024-01-27 15:57:52,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 15:57:52,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:52,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:57:52,921 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 15:57:52,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1036133586, now seen corresponding path program 2 times [2024-01-27 15:57:52,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:52,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181663941] [2024-01-27 15:57:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:52,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:57:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:53,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181663941] [2024-01-27 15:57:53,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181663941] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:57:53,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:57:53,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:57:53,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803899141] [2024-01-27 15:57:53,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:57:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:57:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:57:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:57:53,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:53,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 15:57:53,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:53,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:53,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:53,359 INFO L124 PetriNetUnfolderBase]: 73/138 cut-off events. [2024-01-27 15:57:53,359 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-01-27 15:57:53,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 138 events. 73/138 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 4 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 396. Up to 85 conditions per place. [2024-01-27 15:57:53,363 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 32 selfloop transitions, 15 changer transitions 2/50 dead transitions. [2024-01-27 15:57:53,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 280 flow [2024-01-27 15:57:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:57:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:57:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2024-01-27 15:57:53,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-01-27 15:57:53,367 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 116 flow. Second operand 7 states and 67 transitions. [2024-01-27 15:57:53,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 280 flow [2024-01-27 15:57:53,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 272 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-27 15:57:53,371 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 175 flow [2024-01-27 15:57:53,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=175, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-01-27 15:57:53,372 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-01-27 15:57:53,373 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 175 flow [2024-01-27 15:57:53,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 15:57:53,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:53,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:53,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:57:53,374 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 15:57:53,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:53,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1054567612, now seen corresponding path program 3 times [2024-01-27 15:57:53,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:53,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530807832] [2024-01-27 15:57:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:57:53,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:53,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530807832] [2024-01-27 15:57:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530807832] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:57:53,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:57:53,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:57:53,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428877676] [2024-01-27 15:57:53,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:57:53,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:57:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:53,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:57:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:57:53,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:53,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 15:57:53,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:53,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:53,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:53,708 INFO L124 PetriNetUnfolderBase]: 91/175 cut-off events. [2024-01-27 15:57:53,708 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-01-27 15:57:53,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 175 events. 91/175 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 525 event pairs, 8 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 568. Up to 63 conditions per place. [2024-01-27 15:57:53,713 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 39 selfloop transitions, 19 changer transitions 2/61 dead transitions. [2024-01-27 15:57:53,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 384 flow [2024-01-27 15:57:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:57:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:57:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-01-27 15:57:53,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:57:53,716 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 175 flow. Second operand 8 states and 80 transitions. [2024-01-27 15:57:53,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 384 flow [2024-01-27 15:57:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 357 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-01-27 15:57:53,722 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 234 flow [2024-01-27 15:57:53,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=234, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-01-27 15:57:53,723 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2024-01-27 15:57:53,724 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 234 flow [2024-01-27 15:57:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 15:57:53,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:53,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:57:53,725 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 15:57:53,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1996279358, now seen corresponding path program 1 times [2024-01-27 15:57:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:53,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738673941] [2024-01-27 15:57:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:53,918 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 15:57:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738673941] [2024-01-27 15:57:53,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738673941] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:53,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971267251] [2024-01-27 15:57:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:53,921 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 15:57:53,946 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 15:57:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:54,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:57:54,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:54,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:57:54,361 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2024-01-27 15:57:54,362 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 60 [2024-01-27 15:57:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:57:54,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:54,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 168 [2024-01-27 15:57:54,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:57:54,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 458 treesize of output 394 [2024-01-27 15:58:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:00,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971267251] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:00,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:00,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 15:58:00,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230282555] [2024-01-27 15:58:00,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:00,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:58:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:58:00,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:58:00,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:00,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 234 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:00,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:00,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:00,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:00,997 INFO L124 PetriNetUnfolderBase]: 276/504 cut-off events. [2024-01-27 15:58:00,997 INFO L125 PetriNetUnfolderBase]: For 739/739 co-relation queries the response was YES. [2024-01-27 15:58:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 504 events. 276/504 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2042 event pairs, 30 based on Foata normal form. 14/516 useless extension candidates. Maximal degree in co-relation 1171. Up to 181 conditions per place. [2024-01-27 15:58:01,001 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 63 selfloop transitions, 30 changer transitions 59/153 dead transitions. [2024-01-27 15:58:01,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 153 transitions, 1046 flow [2024-01-27 15:58:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:58:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:58:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 211 transitions. [2024-01-27 15:58:01,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-01-27 15:58:01,006 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 234 flow. Second operand 22 states and 211 transitions. [2024-01-27 15:58:01,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 153 transitions, 1046 flow [2024-01-27 15:58:01,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 153 transitions, 991 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:01,014 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 397 flow [2024-01-27 15:58:01,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=397, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2024-01-27 15:58:01,016 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 48 predicate places. [2024-01-27 15:58:01,017 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 397 flow [2024-01-27 15:58:01,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:01,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:01,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:01,035 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 15:58:01,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:01,232 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 15:58:01,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash 975560605, now seen corresponding path program 1 times [2024-01-27 15:58:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550648562] [2024-01-27 15:58:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:01,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:01,573 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 15:58:01,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550648562] [2024-01-27 15:58:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550648562] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162241685] [2024-01-27 15:58:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:01,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:01,579 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 15:58:01,589 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 15:58:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:01,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:58:01,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:01,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:01,781 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 15:58:01,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:01,987 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:01,988 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 42 treesize of output 22 [2024-01-27 15:58:02,051 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 15:58:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162241685] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:02,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-01-27 15:58:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126803181] [2024-01-27 15:58:02,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:02,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:58:02,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:02,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:58:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:58:02,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:02,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 397 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:02,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:02,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:02,364 INFO L124 PetriNetUnfolderBase]: 218/406 cut-off events. [2024-01-27 15:58:02,365 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-01-27 15:58:02,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 406 events. 218/406 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1588 event pairs, 12 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 1807. Up to 237 conditions per place. [2024-01-27 15:58:02,370 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 57 selfloop transitions, 31 changer transitions 4/93 dead transitions. [2024-01-27 15:58:02,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 792 flow [2024-01-27 15:58:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:58:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:58:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-01-27 15:58:02,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:02,372 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 397 flow. Second operand 10 states and 100 transitions. [2024-01-27 15:58:02,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 792 flow [2024-01-27 15:58:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 93 transitions, 693 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-01-27 15:58:02,382 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 496 flow [2024-01-27 15:58:02,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=496, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-01-27 15:58:02,385 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2024-01-27 15:58:02,385 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 496 flow [2024-01-27 15:58:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:02,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:02,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:02,402 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 15:58:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:58:02,602 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 15:58:02,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash -974695041, now seen corresponding path program 2 times [2024-01-27 15:58:02,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:02,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975341985] [2024-01-27 15:58:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:02,916 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 15:58:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975341985] [2024-01-27 15:58:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975341985] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608118677] [2024-01-27 15:58:02,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:02,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:02,920 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 15:58:02,939 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 15:58:03,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:03,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:03,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:58:03,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:03,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:03,145 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 15:58:03,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:03,375 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:03,376 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 19 treesize of output 7 [2024-01-27 15:58:03,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-27 15:58:03,428 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 15:58:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608118677] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:03,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2024-01-27 15:58:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383608424] [2024-01-27 15:58:03,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:03,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:58:03,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:58:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:58:03,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:03,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 496 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 15:58:03,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:03,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:03,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:03,659 INFO L124 PetriNetUnfolderBase]: 220/415 cut-off events. [2024-01-27 15:58:03,660 INFO L125 PetriNetUnfolderBase]: For 1100/1100 co-relation queries the response was YES. [2024-01-27 15:58:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 415 events. 220/415 cut-off events. For 1100/1100 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1630 event pairs, 32 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1750. Up to 312 conditions per place. [2024-01-27 15:58:03,664 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 53 selfloop transitions, 27 changer transitions 4/85 dead transitions. [2024-01-27 15:58:03,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 754 flow [2024-01-27 15:58:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:58:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:58:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-01-27 15:58:03,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-01-27 15:58:03,666 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 496 flow. Second operand 9 states and 82 transitions. [2024-01-27 15:58:03,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 754 flow [2024-01-27 15:58:03,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 704 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:03,675 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 538 flow [2024-01-27 15:58:03,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=538, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-01-27 15:58:03,676 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 47 predicate places. [2024-01-27 15:58:03,676 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 538 flow [2024-01-27 15:58:03,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 15:58:03,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:03,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:03,694 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 15:58:03,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:03,892 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 15:58:03,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash 611109239, now seen corresponding path program 3 times [2024-01-27 15:58:03,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:03,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940631169] [2024-01-27 15:58:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:04,165 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 15:58:04,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940631169] [2024-01-27 15:58:04,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940631169] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189528129] [2024-01-27 15:58:04,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:04,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:04,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:04,169 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 15:58:04,171 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 15:58:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:04,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:58:04,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:04,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:04,373 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 15:58:04,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:04,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:04,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2024-01-27 15:58:04,576 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 15:58:04,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189528129] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:04,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:04,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-01-27 15:58:04,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753241222] [2024-01-27 15:58:04,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:04,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:58:04,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:58:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:58:04,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:04,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 538 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:58:04,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:04,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:04,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:04,863 INFO L124 PetriNetUnfolderBase]: 238/483 cut-off events. [2024-01-27 15:58:04,863 INFO L125 PetriNetUnfolderBase]: For 1285/1285 co-relation queries the response was YES. [2024-01-27 15:58:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 483 events. 238/483 cut-off events. For 1285/1285 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2150 event pairs, 0 based on Foata normal form. 1/484 useless extension candidates. Maximal degree in co-relation 1964. Up to 242 conditions per place. [2024-01-27 15:58:04,868 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 64 selfloop transitions, 38 changer transitions 9/112 dead transitions. [2024-01-27 15:58:04,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 988 flow [2024-01-27 15:58:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:58:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:58:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 116 transitions. [2024-01-27 15:58:04,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-01-27 15:58:04,869 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 538 flow. Second operand 14 states and 116 transitions. [2024-01-27 15:58:04,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 988 flow [2024-01-27 15:58:04,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 926 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-27 15:58:04,878 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 679 flow [2024-01-27 15:58:04,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=679, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-01-27 15:58:04,880 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 56 predicate places. [2024-01-27 15:58:04,880 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 679 flow [2024-01-27 15:58:04,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:58:04,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:04,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:04,898 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 15:58:05,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:05,081 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 15:58:05,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1847504088, now seen corresponding path program 4 times [2024-01-27 15:58:05,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:05,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186826258] [2024-01-27 15:58:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186826258] [2024-01-27 15:58:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186826258] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:05,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327836677] [2024-01-27 15:58:05,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:05,314 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 15:58:05,332 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 15:58:05,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:05,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:58:05,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:05,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:05,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:06,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-27 15:58:06,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:06,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-01-27 15:58:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327836677] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:06,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:06,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2024-01-27 15:58:06,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293670728] [2024-01-27 15:58:06,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:58:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:58:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:58:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:06,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 679 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:06,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:06,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:08,914 INFO L124 PetriNetUnfolderBase]: 379/857 cut-off events. [2024-01-27 15:58:08,915 INFO L125 PetriNetUnfolderBase]: For 3151/3151 co-relation queries the response was YES. [2024-01-27 15:58:08,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 857 events. 379/857 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4936 event pairs, 26 based on Foata normal form. 30/887 useless extension candidates. Maximal degree in co-relation 3979. Up to 229 conditions per place. [2024-01-27 15:58:08,922 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 139 selfloop transitions, 58 changer transitions 80/278 dead transitions. [2024-01-27 15:58:08,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 278 transitions, 2480 flow [2024-01-27 15:58:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:58:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:58:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 352 transitions. [2024-01-27 15:58:08,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-01-27 15:58:08,925 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 679 flow. Second operand 36 states and 352 transitions. [2024-01-27 15:58:08,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 278 transitions, 2480 flow [2024-01-27 15:58:08,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 278 transitions, 2311 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-01-27 15:58:08,946 INFO L231 Difference]: Finished difference. Result has 110 places, 89 transitions, 957 flow [2024-01-27 15:58:08,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=957, PETRI_PLACES=110, PETRI_TRANSITIONS=89} [2024-01-27 15:58:08,947 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 88 predicate places. [2024-01-27 15:58:08,948 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 89 transitions, 957 flow [2024-01-27 15:58:08,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:08,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:08,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:08,966 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 15:58:09,156 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 15:58:09,157 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 15:58:09,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1990042144, now seen corresponding path program 5 times [2024-01-27 15:58:09,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:09,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546593726] [2024-01-27 15:58:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:09,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:09,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546593726] [2024-01-27 15:58:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546593726] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025856920] [2024-01-27 15:58:09,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:09,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:09,406 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 15:58:09,429 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 15:58:09,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:09,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:58:09,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:09,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:09,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:09,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:10,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:10,300 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:10,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:10,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025856920] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:10,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:10,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-01-27 15:58:10,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736854496] [2024-01-27 15:58:10,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:58:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:58:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:58:10,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:10,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 89 transitions, 957 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:10,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:10,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:10,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:12,063 INFO L124 PetriNetUnfolderBase]: 372/815 cut-off events. [2024-01-27 15:58:12,064 INFO L125 PetriNetUnfolderBase]: For 3939/3939 co-relation queries the response was YES. [2024-01-27 15:58:12,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4353 conditions, 815 events. 372/815 cut-off events. For 3939/3939 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4522 event pairs, 19 based on Foata normal form. 9/823 useless extension candidates. Maximal degree in co-relation 4158. Up to 312 conditions per place. [2024-01-27 15:58:12,071 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 118 selfloop transitions, 54 changer transitions 39/212 dead transitions. [2024-01-27 15:58:12,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 212 transitions, 2219 flow [2024-01-27 15:58:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:58:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:58:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 258 transitions. [2024-01-27 15:58:12,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36134453781512604 [2024-01-27 15:58:12,075 INFO L175 Difference]: Start difference. First operand has 110 places, 89 transitions, 957 flow. Second operand 34 states and 258 transitions. [2024-01-27 15:58:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 212 transitions, 2219 flow [2024-01-27 15:58:12,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 212 transitions, 1929 flow, removed 99 selfloop flow, removed 18 redundant places. [2024-01-27 15:58:12,099 INFO L231 Difference]: Finished difference. Result has 125 places, 110 transitions, 1200 flow [2024-01-27 15:58:12,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1200, PETRI_PLACES=125, PETRI_TRANSITIONS=110} [2024-01-27 15:58:12,100 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2024-01-27 15:58:12,100 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 110 transitions, 1200 flow [2024-01-27 15:58:12,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:12,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:12,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:12,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:58:12,308 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 15:58:12,309 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 15:58:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1483695878, now seen corresponding path program 6 times [2024-01-27 15:58:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488652334] [2024-01-27 15:58:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:12,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488652334] [2024-01-27 15:58:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488652334] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209891811] [2024-01-27 15:58:12,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:12,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:12,520 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 15:58:12,535 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 15:58:12,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:12,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:58:12,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:12,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:12,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:12,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:13,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:13,278 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:13,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:13,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209891811] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:13,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:13,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-01-27 15:58:13,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594117813] [2024-01-27 15:58:13,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:13,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:58:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:58:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:58:13,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:13,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 110 transitions, 1200 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:13,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:13,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:13,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:14,313 INFO L124 PetriNetUnfolderBase]: 412/819 cut-off events. [2024-01-27 15:58:14,313 INFO L125 PetriNetUnfolderBase]: For 4911/4911 co-relation queries the response was YES. [2024-01-27 15:58:14,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4685 conditions, 819 events. 412/819 cut-off events. For 4911/4911 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4144 event pairs, 21 based on Foata normal form. 9/827 useless extension candidates. Maximal degree in co-relation 4601. Up to 382 conditions per place. [2024-01-27 15:58:14,320 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 80 selfloop transitions, 64 changer transitions 34/179 dead transitions. [2024-01-27 15:58:14,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 179 transitions, 2020 flow [2024-01-27 15:58:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:58:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:58:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 192 transitions. [2024-01-27 15:58:14,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3516483516483517 [2024-01-27 15:58:14,322 INFO L175 Difference]: Start difference. First operand has 125 places, 110 transitions, 1200 flow. Second operand 26 states and 192 transitions. [2024-01-27 15:58:14,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 179 transitions, 2020 flow [2024-01-27 15:58:14,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 179 transitions, 1848 flow, removed 55 selfloop flow, removed 14 redundant places. [2024-01-27 15:58:14,341 INFO L231 Difference]: Finished difference. Result has 131 places, 110 transitions, 1331 flow [2024-01-27 15:58:14,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1331, PETRI_PLACES=131, PETRI_TRANSITIONS=110} [2024-01-27 15:58:14,342 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-01-27 15:58:14,342 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 110 transitions, 1331 flow [2024-01-27 15:58:14,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:14,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:14,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:14,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:14,556 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 15:58:14,557 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 15:58:14,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1300043287, now seen corresponding path program 2 times [2024-01-27 15:58:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:14,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980699463] [2024-01-27 15:58:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980699463] [2024-01-27 15:58:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980699463] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653672525] [2024-01-27 15:58:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:14,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:14,685 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 15:58:14,701 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 15:58:14,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:14,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:14,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:14,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:14,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653672525] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:14,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:14,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-27 15:58:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271040846] [2024-01-27 15:58:14,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:14,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:58:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:58:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:58:14,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:14,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 110 transitions, 1331 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:58:14,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:14,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:14,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:15,923 INFO L124 PetriNetUnfolderBase]: 436/835 cut-off events. [2024-01-27 15:58:15,924 INFO L125 PetriNetUnfolderBase]: For 7399/7399 co-relation queries the response was YES. [2024-01-27 15:58:15,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5155 conditions, 835 events. 436/835 cut-off events. For 7399/7399 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4236 event pairs, 54 based on Foata normal form. 16/850 useless extension candidates. Maximal degree in co-relation 5098. Up to 277 conditions per place. [2024-01-27 15:58:15,933 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 131 selfloop transitions, 78 changer transitions 2/212 dead transitions. [2024-01-27 15:58:15,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 212 transitions, 2545 flow [2024-01-27 15:58:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 167 transitions. [2024-01-27 15:58:15,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2024-01-27 15:58:15,935 INFO L175 Difference]: Start difference. First operand has 131 places, 110 transitions, 1331 flow. Second operand 17 states and 167 transitions. [2024-01-27 15:58:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 212 transitions, 2545 flow [2024-01-27 15:58:15,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 212 transitions, 2319 flow, removed 84 selfloop flow, removed 13 redundant places. [2024-01-27 15:58:15,966 INFO L231 Difference]: Finished difference. Result has 112 places, 143 transitions, 1762 flow [2024-01-27 15:58:15,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1762, PETRI_PLACES=112, PETRI_TRANSITIONS=143} [2024-01-27 15:58:15,967 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2024-01-27 15:58:15,967 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 143 transitions, 1762 flow [2024-01-27 15:58:15,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:58:15,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:15,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:15,996 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 15:58:16,185 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 15:58:16,186 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 15:58:16,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash 117711907, now seen corresponding path program 3 times [2024-01-27 15:58:16,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:16,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018837728] [2024-01-27 15:58:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018837728] [2024-01-27 15:58:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018837728] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143554199] [2024-01-27 15:58:16,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:16,387 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 15:58:16,401 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 15:58:16,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:16,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:16,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:16,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:16,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143554199] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:16,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:16,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221072646] [2024-01-27 15:58:16,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:16,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:16,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:16,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 143 transitions, 1762 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 15:58:16,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:16,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:16,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:17,243 INFO L124 PetriNetUnfolderBase]: 504/1002 cut-off events. [2024-01-27 15:58:17,243 INFO L125 PetriNetUnfolderBase]: For 8683/8683 co-relation queries the response was YES. [2024-01-27 15:58:17,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6164 conditions, 1002 events. 504/1002 cut-off events. For 8683/8683 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5572 event pairs, 92 based on Foata normal form. 20/1021 useless extension candidates. Maximal degree in co-relation 6108. Up to 460 conditions per place. [2024-01-27 15:58:17,252 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 162 selfloop transitions, 84 changer transitions 2/249 dead transitions. [2024-01-27 15:58:17,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 249 transitions, 2988 flow [2024-01-27 15:58:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:58:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:58:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 199 transitions. [2024-01-27 15:58:17,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-01-27 15:58:17,253 INFO L175 Difference]: Start difference. First operand has 112 places, 143 transitions, 1762 flow. Second operand 20 states and 199 transitions. [2024-01-27 15:58:17,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 249 transitions, 2988 flow [2024-01-27 15:58:17,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 249 transitions, 2745 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:17,296 INFO L231 Difference]: Finished difference. Result has 134 places, 168 transitions, 2168 flow [2024-01-27 15:58:17,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2168, PETRI_PLACES=134, PETRI_TRANSITIONS=168} [2024-01-27 15:58:17,297 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 112 predicate places. [2024-01-27 15:58:17,297 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 168 transitions, 2168 flow [2024-01-27 15:58:17,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 15:58:17,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:17,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:17,316 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 15:58:17,510 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 15:58:17,511 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 15:58:17,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1717710429, now seen corresponding path program 4 times [2024-01-27 15:58:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:17,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489135986] [2024-01-27 15:58:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:17,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489135986] [2024-01-27 15:58:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489135986] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263030895] [2024-01-27 15:58:17,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:17,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:17,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:17,664 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 15:58:17,689 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 15:58:17,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:17,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:17,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:17,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:17,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263030895] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:17,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:17,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:17,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252520838] [2024-01-27 15:58:17,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:17,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:17,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:17,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 168 transitions, 2168 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:58:17,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:18,409 INFO L124 PetriNetUnfolderBase]: 505/970 cut-off events. [2024-01-27 15:58:18,410 INFO L125 PetriNetUnfolderBase]: For 9422/9422 co-relation queries the response was YES. [2024-01-27 15:58:18,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6164 conditions, 970 events. 505/970 cut-off events. For 9422/9422 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5160 event pairs, 92 based on Foata normal form. 18/987 useless extension candidates. Maximal degree in co-relation 6101. Up to 466 conditions per place. [2024-01-27 15:58:18,418 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 145 selfloop transitions, 80 changer transitions 2/228 dead transitions. [2024-01-27 15:58:18,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 228 transitions, 2935 flow [2024-01-27 15:58:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 161 transitions. [2024-01-27 15:58:18,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-01-27 15:58:18,419 INFO L175 Difference]: Start difference. First operand has 134 places, 168 transitions, 2168 flow. Second operand 16 states and 161 transitions. [2024-01-27 15:58:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 228 transitions, 2935 flow [2024-01-27 15:58:18,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2756 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-01-27 15:58:18,458 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 2198 flow [2024-01-27 15:58:18,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2198, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2024-01-27 15:58:18,459 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2024-01-27 15:58:18,459 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 2198 flow [2024-01-27 15:58:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:58:18,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:18,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:18,471 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 15:58:18,660 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 15:58:18,660 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 15:58:18,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 655567485, now seen corresponding path program 5 times [2024-01-27 15:58:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:18,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823802711] [2024-01-27 15:58:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:18,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:18,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823802711] [2024-01-27 15:58:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823802711] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:18,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426380369] [2024-01-27 15:58:18,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:18,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:18,814 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 15:58:18,832 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 15:58:18,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:18,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:18,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:18,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426380369] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:19,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003149242] [2024-01-27 15:58:19,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:19,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:19,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 2198 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 15:58:19,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:19,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:19,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:19,600 INFO L124 PetriNetUnfolderBase]: 721/1394 cut-off events. [2024-01-27 15:58:19,600 INFO L125 PetriNetUnfolderBase]: For 14684/14684 co-relation queries the response was YES. [2024-01-27 15:58:19,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9085 conditions, 1394 events. 721/1394 cut-off events. For 14684/14684 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8157 event pairs, 115 based on Foata normal form. 32/1425 useless extension candidates. Maximal degree in co-relation 9020. Up to 697 conditions per place. [2024-01-27 15:58:19,613 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 169 selfloop transitions, 110 changer transitions 2/282 dead transitions. [2024-01-27 15:58:19,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 282 transitions, 3937 flow [2024-01-27 15:58:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 163 transitions. [2024-01-27 15:58:19,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-01-27 15:58:19,622 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 2198 flow. Second operand 17 states and 163 transitions. [2024-01-27 15:58:19,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 282 transitions, 3937 flow [2024-01-27 15:58:19,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 282 transitions, 3761 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-01-27 15:58:19,669 INFO L231 Difference]: Finished difference. Result has 158 places, 219 transitions, 3235 flow [2024-01-27 15:58:19,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2052, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3235, PETRI_PLACES=158, PETRI_TRANSITIONS=219} [2024-01-27 15:58:19,670 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-01-27 15:58:19,670 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 219 transitions, 3235 flow [2024-01-27 15:58:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 15:58:19,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:19,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:19,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-27 15:58:19,872 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 15:58:19,873 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 15:58:19,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1179854851, now seen corresponding path program 6 times [2024-01-27 15:58:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:19,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998269491] [2024-01-27 15:58:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998269491] [2024-01-27 15:58:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998269491] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211799330] [2024-01-27 15:58:20,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:20,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:20,012 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 15:58:20,036 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 15:58:20,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:20,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:20,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:20,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:20,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:20,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211799330] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:20,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:20,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949038705] [2024-01-27 15:58:20,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:20,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:20,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 219 transitions, 3235 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:58:20,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:20,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:20,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:20,831 INFO L124 PetriNetUnfolderBase]: 722/1362 cut-off events. [2024-01-27 15:58:20,832 INFO L125 PetriNetUnfolderBase]: For 18557/18557 co-relation queries the response was YES. [2024-01-27 15:58:20,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9683 conditions, 1362 events. 722/1362 cut-off events. For 18557/18557 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7731 event pairs, 113 based on Foata normal form. 18/1379 useless extension candidates. Maximal degree in co-relation 9611. Up to 703 conditions per place. [2024-01-27 15:58:20,847 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 160 selfloop transitions, 108 changer transitions 2/271 dead transitions. [2024-01-27 15:58:20,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 271 transitions, 4189 flow [2024-01-27 15:58:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:58:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:58:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-01-27 15:58:20,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-01-27 15:58:20,854 INFO L175 Difference]: Start difference. First operand has 158 places, 219 transitions, 3235 flow. Second operand 14 states and 139 transitions. [2024-01-27 15:58:20,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 271 transitions, 4189 flow [2024-01-27 15:58:20,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 271 transitions, 3897 flow, removed 138 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:20,958 INFO L231 Difference]: Finished difference. Result has 168 places, 222 transitions, 3273 flow [2024-01-27 15:58:20,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3273, PETRI_PLACES=168, PETRI_TRANSITIONS=222} [2024-01-27 15:58:20,960 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2024-01-27 15:58:20,960 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 222 transitions, 3273 flow [2024-01-27 15:58:20,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:58:20,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:20,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:20,972 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 15:58:21,160 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 15:58:21,161 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 15:58:21,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1780521115, now seen corresponding path program 7 times [2024-01-27 15:58:21,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:21,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638984399] [2024-01-27 15:58:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:21,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:21,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638984399] [2024-01-27 15:58:21,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638984399] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:21,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834875658] [2024-01-27 15:58:21,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:58:21,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:21,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:21,288 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 15:58:21,313 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 15:58:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:21,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:21,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:21,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:21,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834875658] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:21,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:21,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123987575] [2024-01-27 15:58:21,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:21,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:21,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:21,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:21,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 222 transitions, 3273 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:21,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:21,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:22,478 INFO L124 PetriNetUnfolderBase]: 1072/2102 cut-off events. [2024-01-27 15:58:22,479 INFO L125 PetriNetUnfolderBase]: For 30491/30491 co-relation queries the response was YES. [2024-01-27 15:58:22,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15004 conditions, 2102 events. 1072/2102 cut-off events. For 30491/30491 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13390 event pairs, 26 based on Foata normal form. 6/2107 useless extension candidates. Maximal degree in co-relation 14931. Up to 751 conditions per place. [2024-01-27 15:58:22,504 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 212 selfloop transitions, 161 changer transitions 0/374 dead transitions. [2024-01-27 15:58:22,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 374 transitions, 6065 flow [2024-01-27 15:58:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 172 transitions. [2024-01-27 15:58:22,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48179271708683474 [2024-01-27 15:58:22,506 INFO L175 Difference]: Start difference. First operand has 168 places, 222 transitions, 3273 flow. Second operand 17 states and 172 transitions. [2024-01-27 15:58:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 374 transitions, 6065 flow [2024-01-27 15:58:22,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 374 transitions, 5806 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-01-27 15:58:22,666 INFO L231 Difference]: Finished difference. Result has 182 places, 274 transitions, 4414 flow [2024-01-27 15:58:22,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4414, PETRI_PLACES=182, PETRI_TRANSITIONS=274} [2024-01-27 15:58:22,667 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 160 predicate places. [2024-01-27 15:58:22,667 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 274 transitions, 4414 flow [2024-01-27 15:58:22,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:22,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:22,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:22,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:22,880 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 15:58:22,881 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 15:58:22,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1798955141, now seen corresponding path program 8 times [2024-01-27 15:58:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856139039] [2024-01-27 15:58:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:23,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856139039] [2024-01-27 15:58:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856139039] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224078871] [2024-01-27 15:58:23,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:23,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:23,029 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 15:58:23,049 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 15:58:23,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:23,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:23,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:23,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:23,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224078871] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:23,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:23,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:58:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134145675] [2024-01-27 15:58:23,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:58:23,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:58:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:58:23,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:23,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 274 transitions, 4414 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 15:58:23,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:23,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:23,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:24,241 INFO L124 PetriNetUnfolderBase]: 1308/2579 cut-off events. [2024-01-27 15:58:24,241 INFO L125 PetriNetUnfolderBase]: For 50978/50978 co-relation queries the response was YES. [2024-01-27 15:58:24,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20018 conditions, 2579 events. 1308/2579 cut-off events. For 50978/50978 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17087 event pairs, 80 based on Foata normal form. 14/2592 useless extension candidates. Maximal degree in co-relation 19938. Up to 927 conditions per place. [2024-01-27 15:58:24,264 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 202 selfloop transitions, 206 changer transitions 0/409 dead transitions. [2024-01-27 15:58:24,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 409 transitions, 7039 flow [2024-01-27 15:58:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:58:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:58:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 191 transitions. [2024-01-27 15:58:24,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47869674185463656 [2024-01-27 15:58:24,267 INFO L175 Difference]: Start difference. First operand has 182 places, 274 transitions, 4414 flow. Second operand 19 states and 191 transitions. [2024-01-27 15:58:24,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 409 transitions, 7039 flow [2024-01-27 15:58:24,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 409 transitions, 6541 flow, removed 192 selfloop flow, removed 8 redundant places. [2024-01-27 15:58:24,525 INFO L231 Difference]: Finished difference. Result has 200 places, 317 transitions, 5374 flow [2024-01-27 15:58:24,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5374, PETRI_PLACES=200, PETRI_TRANSITIONS=317} [2024-01-27 15:58:24,526 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 178 predicate places. [2024-01-27 15:58:24,526 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 317 transitions, 5374 flow [2024-01-27 15:58:24,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 15:58:24,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:24,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:24,538 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 15:58:24,726 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 15:58:24,727 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 15:58:24,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -660589819, now seen corresponding path program 9 times [2024-01-27 15:58:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534268152] [2024-01-27 15:58:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:24,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534268152] [2024-01-27 15:58:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534268152] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166454220] [2024-01-27 15:58:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:24,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:24,868 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 15:58:24,895 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 15:58:24,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:24,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:25,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:25,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166454220] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:25,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:25,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:58:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811698883] [2024-01-27 15:58:25,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:58:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:58:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:58:25,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:25,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 317 transitions, 5374 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:25,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:25,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:25,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:25,981 INFO L124 PetriNetUnfolderBase]: 1351/2670 cut-off events. [2024-01-27 15:58:25,981 INFO L125 PetriNetUnfolderBase]: For 62045/62045 co-relation queries the response was YES. [2024-01-27 15:58:25,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21647 conditions, 2670 events. 1351/2670 cut-off events. For 62045/62045 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17741 event pairs, 100 based on Foata normal form. 16/2685 useless extension candidates. Maximal degree in co-relation 21563. Up to 975 conditions per place. [2024-01-27 15:58:26,006 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 185 selfloop transitions, 202 changer transitions 0/388 dead transitions. [2024-01-27 15:58:26,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 388 transitions, 7040 flow [2024-01-27 15:58:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 149 transitions. [2024-01-27 15:58:26,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-01-27 15:58:26,007 INFO L175 Difference]: Start difference. First operand has 200 places, 317 transitions, 5374 flow. Second operand 16 states and 149 transitions. [2024-01-27 15:58:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 388 transitions, 7040 flow [2024-01-27 15:58:26,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 388 transitions, 6766 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:26,280 INFO L231 Difference]: Finished difference. Result has 214 places, 328 transitions, 5935 flow [2024-01-27 15:58:26,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5935, PETRI_PLACES=214, PETRI_TRANSITIONS=328} [2024-01-27 15:58:26,280 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 192 predicate places. [2024-01-27 15:58:26,281 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 328 transitions, 5935 flow [2024-01-27 15:58:26,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:26,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:26,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:26,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:26,492 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 15:58:26,492 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 15:58:26,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2080612915, now seen corresponding path program 10 times [2024-01-27 15:58:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:26,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069146809] [2024-01-27 15:58:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:26,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:26,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069146809] [2024-01-27 15:58:26,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069146809] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978768846] [2024-01-27 15:58:26,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:26,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:26,692 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 15:58:26,713 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 15:58:26,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:26,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:26,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:58:26,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:26,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:26,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978768846] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:26,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:58:26,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014736955] [2024-01-27 15:58:26,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:26,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:58:26,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:58:26,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:58:26,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:26,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 328 transitions, 5935 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 15:58:26,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:26,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:26,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:35,558 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 26 DAG size of output: 26 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:58:36,426 INFO L124 PetriNetUnfolderBase]: 1359/2694 cut-off events. [2024-01-27 15:58:36,426 INFO L125 PetriNetUnfolderBase]: For 66231/66231 co-relation queries the response was YES. [2024-01-27 15:58:36,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22628 conditions, 2694 events. 1359/2694 cut-off events. For 66231/66231 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18026 event pairs, 181 based on Foata normal form. 20/2713 useless extension candidates. Maximal degree in co-relation 22541. Up to 959 conditions per place. [2024-01-27 15:58:36,450 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 247 selfloop transitions, 195 changer transitions 2/445 dead transitions. [2024-01-27 15:58:36,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 445 transitions, 8102 flow [2024-01-27 15:58:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:58:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:58:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 183 transitions. [2024-01-27 15:58:36,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-01-27 15:58:36,452 INFO L175 Difference]: Start difference. First operand has 214 places, 328 transitions, 5935 flow. Second operand 21 states and 183 transitions. [2024-01-27 15:58:36,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 445 transitions, 8102 flow [2024-01-27 15:58:36,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 445 transitions, 8002 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:36,812 INFO L231 Difference]: Finished difference. Result has 237 places, 348 transitions, 6781 flow [2024-01-27 15:58:36,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6781, PETRI_PLACES=237, PETRI_TRANSITIONS=348} [2024-01-27 15:58:36,813 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2024-01-27 15:58:36,813 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 348 transitions, 6781 flow [2024-01-27 15:58:36,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 15:58:36,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:36,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:36,827 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 15:58:37,014 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 15:58:37,014 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 15:58:37,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 785603460, now seen corresponding path program 1 times [2024-01-27 15:58:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439348622] [2024-01-27 15:58:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:37,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439348622] [2024-01-27 15:58:37,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439348622] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:37,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488221454] [2024-01-27 15:58:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:37,201 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 15:58:37,218 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 15:58:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:37,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:37,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:37,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488221454] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:37,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:37,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-01-27 15:58:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176192910] [2024-01-27 15:58:37,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:58:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:58:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:58:37,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:37,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 348 transitions, 6781 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 15:58:37,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:37,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:37,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:38,591 INFO L124 PetriNetUnfolderBase]: 1224/2477 cut-off events. [2024-01-27 15:58:38,592 INFO L125 PetriNetUnfolderBase]: For 72641/72641 co-relation queries the response was YES. [2024-01-27 15:58:38,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21817 conditions, 2477 events. 1224/2477 cut-off events. For 72641/72641 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16544 event pairs, 185 based on Foata normal form. 68/2544 useless extension candidates. Maximal degree in co-relation 21721. Up to 811 conditions per place. [2024-01-27 15:58:38,611 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 205 selfloop transitions, 151 changer transitions 13/370 dead transitions. [2024-01-27 15:58:38,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 370 transitions, 7519 flow [2024-01-27 15:58:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:58:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:58:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-01-27 15:58:38,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-01-27 15:58:38,613 INFO L175 Difference]: Start difference. First operand has 237 places, 348 transitions, 6781 flow. Second operand 9 states and 92 transitions. [2024-01-27 15:58:38,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 370 transitions, 7519 flow [2024-01-27 15:58:38,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 370 transitions, 7250 flow, removed 105 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:38,906 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 6281 flow [2024-01-27 15:58:38,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6281, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-01-27 15:58:38,907 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2024-01-27 15:58:38,907 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 6281 flow [2024-01-27 15:58:38,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 15:58:38,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:38,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:38,921 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 15:58:39,113 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 15:58:39,113 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 15:58:39,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash -599566659, now seen corresponding path program 7 times [2024-01-27 15:58:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:39,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675349665] [2024-01-27 15:58:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:39,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:39,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675349665] [2024-01-27 15:58:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675349665] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889272651] [2024-01-27 15:58:39,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:58:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:39,298 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 15:58:39,300 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 15:58:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:39,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:58:39,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:39,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889272651] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:39,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2024-01-27 15:58:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065537423] [2024-01-27 15:58:39,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:39,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:39,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 6281 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 15:58:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:40,499 INFO L124 PetriNetUnfolderBase]: 1222/2444 cut-off events. [2024-01-27 15:58:40,499 INFO L125 PetriNetUnfolderBase]: For 67929/67929 co-relation queries the response was YES. [2024-01-27 15:58:40,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21854 conditions, 2444 events. 1222/2444 cut-off events. For 67929/67929 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16062 event pairs, 135 based on Foata normal form. 6/2449 useless extension candidates. Maximal degree in co-relation 21759. Up to 803 conditions per place. [2024-01-27 15:58:40,516 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 306 selfloop transitions, 156 changer transitions 8/471 dead transitions. [2024-01-27 15:58:40,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 471 transitions, 9523 flow [2024-01-27 15:58:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:58:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:58:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 193 transitions. [2024-01-27 15:58:40,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-01-27 15:58:40,518 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 6281 flow. Second operand 20 states and 193 transitions. [2024-01-27 15:58:40,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 471 transitions, 9523 flow [2024-01-27 15:58:40,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 471 transitions, 9097 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-01-27 15:58:40,745 INFO L231 Difference]: Finished difference. Result has 248 places, 337 transitions, 6692 flow [2024-01-27 15:58:40,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6692, PETRI_PLACES=248, PETRI_TRANSITIONS=337} [2024-01-27 15:58:40,745 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 226 predicate places. [2024-01-27 15:58:40,745 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 337 transitions, 6692 flow [2024-01-27 15:58:40,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 15:58:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:40,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:40,757 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 15:58:40,946 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 15:58:40,946 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 15:58:40,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1992517727, now seen corresponding path program 8 times [2024-01-27 15:58:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:40,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453847884] [2024-01-27 15:58:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:40,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:41,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453847884] [2024-01-27 15:58:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453847884] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48311716] [2024-01-27 15:58:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:41,124 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 15:58:41,147 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 15:58:41,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:41,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:58:41,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:41,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:41,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48311716] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:58:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 12 [2024-01-27 15:58:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750537761] [2024-01-27 15:58:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:41,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:41,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 337 transitions, 6692 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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 15:58:41,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:41,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:41,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:41,981 INFO L124 PetriNetUnfolderBase]: 1219/2556 cut-off events. [2024-01-27 15:58:41,981 INFO L125 PetriNetUnfolderBase]: For 64656/64656 co-relation queries the response was YES. [2024-01-27 15:58:41,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21864 conditions, 2556 events. 1219/2556 cut-off events. For 64656/64656 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17657 event pairs, 87 based on Foata normal form. 18/2573 useless extension candidates. Maximal degree in co-relation 21769. Up to 1418 conditions per place. [2024-01-27 15:58:42,000 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 246 selfloop transitions, 113 changer transitions 0/360 dead transitions. [2024-01-27 15:58:42,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 360 transitions, 7667 flow [2024-01-27 15:58:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-01-27 15:58:42,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:58:42,009 INFO L175 Difference]: Start difference. First operand has 248 places, 337 transitions, 6692 flow. Second operand 5 states and 60 transitions. [2024-01-27 15:58:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 360 transitions, 7667 flow [2024-01-27 15:58:42,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 360 transitions, 7159 flow, removed 115 selfloop flow, removed 12 redundant places. [2024-01-27 15:58:42,276 INFO L231 Difference]: Finished difference. Result has 242 places, 346 transitions, 6837 flow [2024-01-27 15:58:42,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6113, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6837, PETRI_PLACES=242, PETRI_TRANSITIONS=346} [2024-01-27 15:58:42,277 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 220 predicate places. [2024-01-27 15:58:42,277 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 346 transitions, 6837 flow [2024-01-27 15:58:42,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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 15:58:42,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:42,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:42,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-27 15:58:42,478 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 15:58:42,478 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 15:58:42,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash -762770023, now seen corresponding path program 9 times [2024-01-27 15:58:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:42,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649699451] [2024-01-27 15:58:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:42,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:42,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649699451] [2024-01-27 15:58:42,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649699451] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:42,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613631968] [2024-01-27 15:58:42,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:42,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:42,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:42,596 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 15:58:42,622 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 15:58:42,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:42,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:58:42,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:42,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:42,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613631968] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:42,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:42,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-01-27 15:58:42,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257924492] [2024-01-27 15:58:42,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:42,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:58:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:58:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:58:42,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:42,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 346 transitions, 6837 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 15:58:42,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:42,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:42,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:43,643 INFO L124 PetriNetUnfolderBase]: 1215/2552 cut-off events. [2024-01-27 15:58:43,644 INFO L125 PetriNetUnfolderBase]: For 51792/51792 co-relation queries the response was YES. [2024-01-27 15:58:43,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20778 conditions, 2552 events. 1215/2552 cut-off events. For 51792/51792 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17687 event pairs, 245 based on Foata normal form. 4/2555 useless extension candidates. Maximal degree in co-relation 20685. Up to 1063 conditions per place. [2024-01-27 15:58:43,672 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 251 selfloop transitions, 130 changer transitions 9/391 dead transitions. [2024-01-27 15:58:43,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 391 transitions, 8088 flow [2024-01-27 15:58:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:58:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:58:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 116 transitions. [2024-01-27 15:58:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-01-27 15:58:43,674 INFO L175 Difference]: Start difference. First operand has 242 places, 346 transitions, 6837 flow. Second operand 13 states and 116 transitions. [2024-01-27 15:58:43,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 391 transitions, 8088 flow [2024-01-27 15:58:44,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 391 transitions, 8076 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-27 15:58:44,022 INFO L231 Difference]: Finished difference. Result has 254 places, 340 transitions, 6972 flow [2024-01-27 15:58:44,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6972, PETRI_PLACES=254, PETRI_TRANSITIONS=340} [2024-01-27 15:58:44,022 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 232 predicate places. [2024-01-27 15:58:44,022 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 340 transitions, 6972 flow [2024-01-27 15:58:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 15:58:44,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:44,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:44,034 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 15:58:44,223 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 15:58:44,223 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 15:58:44,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1546763303, now seen corresponding path program 10 times [2024-01-27 15:58:44,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:44,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164835577] [2024-01-27 15:58:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:44,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164835577] [2024-01-27 15:58:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164835577] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568757051] [2024-01-27 15:58:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:44,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:44,380 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 15:58:44,388 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 15:58:44,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:44,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:44,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:58:44,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:44,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:44,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568757051] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:44,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:44,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-01-27 15:58:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896737274] [2024-01-27 15:58:44,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:44,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:58:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:58:44,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:58:44,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:44,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 340 transitions, 6972 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:44,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:44,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:44,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:45,667 INFO L124 PetriNetUnfolderBase]: 1297/2728 cut-off events. [2024-01-27 15:58:45,667 INFO L125 PetriNetUnfolderBase]: For 62929/62929 co-relation queries the response was YES. [2024-01-27 15:58:45,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22653 conditions, 2728 events. 1297/2728 cut-off events. For 62929/62929 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19338 event pairs, 235 based on Foata normal form. 46/2773 useless extension candidates. Maximal degree in co-relation 22559. Up to 1081 conditions per place. [2024-01-27 15:58:45,686 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 252 selfloop transitions, 175 changer transitions 0/428 dead transitions. [2024-01-27 15:58:45,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 428 transitions, 8927 flow [2024-01-27 15:58:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2024-01-27 15:58:45,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:45,688 INFO L175 Difference]: Start difference. First operand has 254 places, 340 transitions, 6972 flow. Second operand 16 states and 160 transitions. [2024-01-27 15:58:45,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 428 transitions, 8927 flow [2024-01-27 15:58:45,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 428 transitions, 8419 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-01-27 15:58:45,931 INFO L231 Difference]: Finished difference. Result has 258 places, 364 transitions, 7664 flow [2024-01-27 15:58:45,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7664, PETRI_PLACES=258, PETRI_TRANSITIONS=364} [2024-01-27 15:58:45,931 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 236 predicate places. [2024-01-27 15:58:45,931 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 364 transitions, 7664 flow [2024-01-27 15:58:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:45,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:45,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:45,943 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 15:58:46,132 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 15:58:46,132 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 15:58:46,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 264581885, now seen corresponding path program 11 times [2024-01-27 15:58:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006996659] [2024-01-27 15:58:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:46,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:46,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006996659] [2024-01-27 15:58:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006996659] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774899469] [2024-01-27 15:58:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:46,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:46,228 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 15:58:46,251 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 15:58:46,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:46,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:46,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:58:46,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:46,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:46,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774899469] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:46,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2024-01-27 15:58:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272127056] [2024-01-27 15:58:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:46,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:58:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:58:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:58:46,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:46,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 364 transitions, 7664 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 15:58:46,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:46,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:46,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:47,220 INFO L124 PetriNetUnfolderBase]: 1284/2713 cut-off events. [2024-01-27 15:58:47,221 INFO L125 PetriNetUnfolderBase]: For 63012/63012 co-relation queries the response was YES. [2024-01-27 15:58:47,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23097 conditions, 2713 events. 1284/2713 cut-off events. For 63012/63012 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19225 event pairs, 317 based on Foata normal form. 8/2720 useless extension candidates. Maximal degree in co-relation 22999. Up to 1490 conditions per place. [2024-01-27 15:58:47,243 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 293 selfloop transitions, 89 changer transitions 11/394 dead transitions. [2024-01-27 15:58:47,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 394 transitions, 8867 flow [2024-01-27 15:58:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:58:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:58:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-01-27 15:58:47,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-01-27 15:58:47,244 INFO L175 Difference]: Start difference. First operand has 258 places, 364 transitions, 7664 flow. Second operand 9 states and 75 transitions. [2024-01-27 15:58:47,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 394 transitions, 8867 flow [2024-01-27 15:58:47,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 394 transitions, 8667 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-01-27 15:58:47,513 INFO L231 Difference]: Finished difference. Result has 257 places, 352 transitions, 7435 flow [2024-01-27 15:58:47,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7447, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7435, PETRI_PLACES=257, PETRI_TRANSITIONS=352} [2024-01-27 15:58:47,514 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 235 predicate places. [2024-01-27 15:58:47,514 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 352 transitions, 7435 flow [2024-01-27 15:58:47,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 15:58:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:47,525 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 15:58:47,714 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 15:58:47,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:47,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 530164711, now seen corresponding path program 12 times [2024-01-27 15:58:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868097873] [2024-01-27 15:58:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:47,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:47,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868097873] [2024-01-27 15:58:47,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868097873] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:47,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045379592] [2024-01-27 15:58:47,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:47,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:47,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:47,876 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 15:58:47,899 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 15:58:48,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:48,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:58:48,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:48,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045379592] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:48,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:48,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-01-27 15:58:48,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671933844] [2024-01-27 15:58:48,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:48,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:58:48,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:58:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:58:48,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:48,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 352 transitions, 7435 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:58:48,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:48,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:48,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:49,148 INFO L124 PetriNetUnfolderBase]: 1314/2730 cut-off events. [2024-01-27 15:58:49,148 INFO L125 PetriNetUnfolderBase]: For 63273/63273 co-relation queries the response was YES. [2024-01-27 15:58:49,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23478 conditions, 2730 events. 1314/2730 cut-off events. For 63273/63273 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19099 event pairs, 487 based on Foata normal form. 24/2753 useless extension candidates. Maximal degree in co-relation 23382. Up to 2405 conditions per place. [2024-01-27 15:58:49,176 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 322 selfloop transitions, 92 changer transitions 0/415 dead transitions. [2024-01-27 15:58:49,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 415 transitions, 8903 flow [2024-01-27 15:58:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 155 transitions. [2024-01-27 15:58:49,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2024-01-27 15:58:49,177 INFO L175 Difference]: Start difference. First operand has 257 places, 352 transitions, 7435 flow. Second operand 17 states and 155 transitions. [2024-01-27 15:58:49,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 415 transitions, 8903 flow [2024-01-27 15:58:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 415 transitions, 8531 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-01-27 15:58:49,401 INFO L231 Difference]: Finished difference. Result has 265 places, 368 transitions, 7676 flow [2024-01-27 15:58:49,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7676, PETRI_PLACES=265, PETRI_TRANSITIONS=368} [2024-01-27 15:58:49,402 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 243 predicate places. [2024-01-27 15:58:49,402 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 368 transitions, 7676 flow [2024-01-27 15:58:49,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:58:49,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:49,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:49,413 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 15:58:49,602 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 15:58:49,602 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 15:58:49,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1431181319, now seen corresponding path program 11 times [2024-01-27 15:58:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612834751] [2024-01-27 15:58:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:49,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612834751] [2024-01-27 15:58:49,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612834751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:49,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095940102] [2024-01-27 15:58:49,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:49,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:49,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:49,733 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 15:58:49,760 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 15:58:49,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:49,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:58:49,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:49,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095940102] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:58:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802538106] [2024-01-27 15:58:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:50,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:58:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:58:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:58:50,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:50,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 368 transitions, 7676 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 15:58:50,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:50,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:50,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:51,316 INFO L124 PetriNetUnfolderBase]: 1326/2755 cut-off events. [2024-01-27 15:58:51,316 INFO L125 PetriNetUnfolderBase]: For 61553/61553 co-relation queries the response was YES. [2024-01-27 15:58:51,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23340 conditions, 2755 events. 1326/2755 cut-off events. For 61553/61553 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19338 event pairs, 193 based on Foata normal form. 24/2778 useless extension candidates. Maximal degree in co-relation 23241. Up to 1077 conditions per place. [2024-01-27 15:58:51,344 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 272 selfloop transitions, 161 changer transitions 0/434 dead transitions. [2024-01-27 15:58:51,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 434 transitions, 9159 flow [2024-01-27 15:58:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 144 transitions. [2024-01-27 15:58:51,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2024-01-27 15:58:51,346 INFO L175 Difference]: Start difference. First operand has 265 places, 368 transitions, 7676 flow. Second operand 17 states and 144 transitions. [2024-01-27 15:58:51,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 434 transitions, 9159 flow [2024-01-27 15:58:51,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 434 transitions, 8864 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-01-27 15:58:51,564 INFO L231 Difference]: Finished difference. Result has 275 places, 373 transitions, 7863 flow [2024-01-27 15:58:51,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7863, PETRI_PLACES=275, PETRI_TRANSITIONS=373} [2024-01-27 15:58:51,565 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 253 predicate places. [2024-01-27 15:58:51,565 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 373 transitions, 7863 flow [2024-01-27 15:58:51,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 15:58:51,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:51,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:51,578 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 15:58:51,770 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 15:58:51,770 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 15:58:51,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2010234522, now seen corresponding path program 2 times [2024-01-27 15:58:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900543302] [2024-01-27 15:58:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:51,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900543302] [2024-01-27 15:58:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900543302] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911849128] [2024-01-27 15:58:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:51,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:51,972 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 15:58:51,998 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 15:58:52,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:52,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:58:52,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:52,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911849128] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:52,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-01-27 15:58:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873541784] [2024-01-27 15:58:52,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:52,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:58:52,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:58:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:58:52,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:52,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 373 transitions, 7863 flow. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:52,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:52,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:52,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:01,856 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 28 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:59:02,897 INFO L124 PetriNetUnfolderBase]: 1603/3367 cut-off events. [2024-01-27 15:59:02,897 INFO L125 PetriNetUnfolderBase]: For 78566/78566 co-relation queries the response was YES. [2024-01-27 15:59:02,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28531 conditions, 3367 events. 1603/3367 cut-off events. For 78566/78566 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24903 event pairs, 224 based on Foata normal form. 74/3440 useless extension candidates. Maximal degree in co-relation 28432. Up to 1235 conditions per place. [2024-01-27 15:59:02,924 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 340 selfloop transitions, 248 changer transitions 1/590 dead transitions. [2024-01-27 15:59:02,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 590 transitions, 11733 flow [2024-01-27 15:59:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:59:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:59:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 335 transitions. [2024-01-27 15:59:02,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44312169312169314 [2024-01-27 15:59:02,926 INFO L175 Difference]: Start difference. First operand has 275 places, 373 transitions, 7863 flow. Second operand 36 states and 335 transitions. [2024-01-27 15:59:02,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 590 transitions, 11733 flow [2024-01-27 15:59:03,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 590 transitions, 11532 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-01-27 15:59:03,193 INFO L231 Difference]: Finished difference. Result has 318 places, 463 transitions, 10535 flow [2024-01-27 15:59:03,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7678, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10535, PETRI_PLACES=318, PETRI_TRANSITIONS=463} [2024-01-27 15:59:03,193 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 296 predicate places. [2024-01-27 15:59:03,194 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 463 transitions, 10535 flow [2024-01-27 15:59:03,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:03,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:03,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:03,206 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 15:59:03,398 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 15:59:03,398 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 15:59:03,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1694394819, now seen corresponding path program 3 times [2024-01-27 15:59:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:03,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998258383] [2024-01-27 15:59:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:04,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998258383] [2024-01-27 15:59:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998258383] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:04,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410554263] [2024-01-27 15:59:04,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:59:04,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:04,445 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 15:59:04,452 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 15:59:04,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:59:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:04,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:59:04,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:04,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:04,825 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-27 15:59:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:04,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:05,157 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:59:05,157 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:59:05,211 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 15:59:05,211 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 15:59:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410554263] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:05,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:05,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-27 15:59:05,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100275900] [2024-01-27 15:59:05,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:05,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:59:05,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:59:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:59:05,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:05,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 463 transitions, 10535 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:05,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:05,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:07,090 INFO L124 PetriNetUnfolderBase]: 1836/3800 cut-off events. [2024-01-27 15:59:07,090 INFO L125 PetriNetUnfolderBase]: For 100208/100208 co-relation queries the response was YES. [2024-01-27 15:59:07,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35183 conditions, 3800 events. 1836/3800 cut-off events. For 100208/100208 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28174 event pairs, 189 based on Foata normal form. 10/3808 useless extension candidates. Maximal degree in co-relation 34979. Up to 3171 conditions per place. [2024-01-27 15:59:07,128 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 489 selfloop transitions, 135 changer transitions 24/649 dead transitions. [2024-01-27 15:59:07,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 649 transitions, 14503 flow [2024-01-27 15:59:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:59:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:59:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 258 transitions. [2024-01-27 15:59:07,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-01-27 15:59:07,130 INFO L175 Difference]: Start difference. First operand has 318 places, 463 transitions, 10535 flow. Second operand 27 states and 258 transitions. [2024-01-27 15:59:07,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 649 transitions, 14503 flow [2024-01-27 15:59:07,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 649 transitions, 13899 flow, removed 285 selfloop flow, removed 5 redundant places. [2024-01-27 15:59:07,568 INFO L231 Difference]: Finished difference. Result has 349 places, 542 transitions, 12031 flow [2024-01-27 15:59:07,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9951, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12031, PETRI_PLACES=349, PETRI_TRANSITIONS=542} [2024-01-27 15:59:07,569 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 327 predicate places. [2024-01-27 15:59:07,569 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 542 transitions, 12031 flow [2024-01-27 15:59:07,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:07,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:07,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:07,580 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 15:59:07,769 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 15:59:07,770 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 15:59:07,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1973518834, now seen corresponding path program 13 times [2024-01-27 15:59:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177021171] [2024-01-27 15:59:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:07,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:07,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177021171] [2024-01-27 15:59:07,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177021171] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:07,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597823927] [2024-01-27 15:59:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:59:07,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:07,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:07,948 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 15:59:07,972 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 15:59:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:08,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:59:08,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:08,533 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-01-27 15:59:08,533 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-01-27 15:59:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:08,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:08,959 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-01-27 15:59:08,959 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 119 [2024-01-27 15:59:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:09,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597823927] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:09,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:09,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-01-27 15:59:09,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717969252] [2024-01-27 15:59:09,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:09,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:59:09,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:09,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:59:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:59:09,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:09,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 542 transitions, 12031 flow. Second operand has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:09,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:09,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:09,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:14,023 INFO L124 PetriNetUnfolderBase]: 3218/6219 cut-off events. [2024-01-27 15:59:14,023 INFO L125 PetriNetUnfolderBase]: For 182067/182067 co-relation queries the response was YES. [2024-01-27 15:59:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60529 conditions, 6219 events. 3218/6219 cut-off events. For 182067/182067 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 47450 event pairs, 197 based on Foata normal form. 29/6247 useless extension candidates. Maximal degree in co-relation 60314. Up to 2097 conditions per place. [2024-01-27 15:59:14,086 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 650 selfloop transitions, 528 changer transitions 29/1208 dead transitions. [2024-01-27 15:59:14,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1208 transitions, 27247 flow [2024-01-27 15:59:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-27 15:59:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-27 15:59:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 520 transitions. [2024-01-27 15:59:14,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-01-27 15:59:14,088 INFO L175 Difference]: Start difference. First operand has 349 places, 542 transitions, 12031 flow. Second operand 56 states and 520 transitions. [2024-01-27 15:59:14,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1208 transitions, 27247 flow [2024-01-27 15:59:14,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1208 transitions, 26915 flow, removed 164 selfloop flow, removed 3 redundant places. [2024-01-27 15:59:14,987 INFO L231 Difference]: Finished difference. Result has 429 places, 878 transitions, 21966 flow [2024-01-27 15:59:14,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11781, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=21966, PETRI_PLACES=429, PETRI_TRANSITIONS=878} [2024-01-27 15:59:14,988 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 407 predicate places. [2024-01-27 15:59:14,988 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 878 transitions, 21966 flow [2024-01-27 15:59:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:14,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:14,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:14,999 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 15:59:15,192 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 15:59:15,193 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 15:59:15,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1300274367, now seen corresponding path program 4 times [2024-01-27 15:59:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:15,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922818370] [2024-01-27 15:59:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:16,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:16,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922818370] [2024-01-27 15:59:16,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922818370] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:16,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46866452] [2024-01-27 15:59:16,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:59:16,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:16,070 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 15:59:16,071 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 15:59:16,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:59:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:16,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:59:16,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:16,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:16,381 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-27 15:59:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:16,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:16,759 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:59:16,759 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:59:16,816 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 15:59:16,816 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 15:59:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:16,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46866452] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:16,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:16,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-27 15:59:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550468468] [2024-01-27 15:59:16,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:59:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:59:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:59:16,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:16,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 878 transitions, 21966 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:16,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:16,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:16,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:20,158 INFO L124 PetriNetUnfolderBase]: 3238/6257 cut-off events. [2024-01-27 15:59:20,159 INFO L125 PetriNetUnfolderBase]: For 217509/217509 co-relation queries the response was YES. [2024-01-27 15:59:20,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66035 conditions, 6257 events. 3238/6257 cut-off events. For 217509/217509 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 47964 event pairs, 265 based on Foata normal form. 8/6265 useless extension candidates. Maximal degree in co-relation 65791. Up to 5340 conditions per place. [2024-01-27 15:59:20,234 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 792 selfloop transitions, 198 changer transitions 27/1018 dead transitions. [2024-01-27 15:59:20,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1018 transitions, 25644 flow [2024-01-27 15:59:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:59:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:59:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 268 transitions. [2024-01-27 15:59:20,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-01-27 15:59:20,236 INFO L175 Difference]: Start difference. First operand has 429 places, 878 transitions, 21966 flow. Second operand 28 states and 268 transitions. [2024-01-27 15:59:20,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1018 transitions, 25644 flow [2024-01-27 15:59:21,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1018 transitions, 23447 flow, removed 812 selfloop flow, removed 18 redundant places. [2024-01-27 15:59:21,628 INFO L231 Difference]: Finished difference. Result has 446 places, 903 transitions, 20985 flow [2024-01-27 15:59:21,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19840, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=20985, PETRI_PLACES=446, PETRI_TRANSITIONS=903} [2024-01-27 15:59:21,629 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 424 predicate places. [2024-01-27 15:59:21,629 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 903 transitions, 20985 flow [2024-01-27 15:59:21,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:21,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:21,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:21,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:21,847 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 15:59:21,847 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 15:59:21,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1699117443, now seen corresponding path program 5 times [2024-01-27 15:59:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:21,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326422004] [2024-01-27 15:59:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:23,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326422004] [2024-01-27 15:59:23,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326422004] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825035296] [2024-01-27 15:59:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:59:23,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:23,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:23,081 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 15:59:23,082 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 15:59:23,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:59:23,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:23,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:59:23,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:23,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:23,386 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-01-27 15:59:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:23,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:23,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:23,804 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-01-27 15:59:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:24,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825035296] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:24,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:24,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2024-01-27 15:59:24,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891939624] [2024-01-27 15:59:24,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:24,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:59:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:59:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:59:24,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:24,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 903 transitions, 20985 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 15:59:24,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:24,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:24,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:27,306 INFO L124 PetriNetUnfolderBase]: 3215/6218 cut-off events. [2024-01-27 15:59:27,306 INFO L125 PetriNetUnfolderBase]: For 198274/198274 co-relation queries the response was YES. [2024-01-27 15:59:27,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62617 conditions, 6218 events. 3215/6218 cut-off events. For 198274/198274 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47445 event pairs, 287 based on Foata normal form. 2/6220 useless extension candidates. Maximal degree in co-relation 62366. Up to 5551 conditions per place. [2024-01-27 15:59:27,371 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 830 selfloop transitions, 150 changer transitions 11/992 dead transitions. [2024-01-27 15:59:27,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 992 transitions, 23692 flow [2024-01-27 15:59:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:59:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:59:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 235 transitions. [2024-01-27 15:59:27,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-01-27 15:59:27,373 INFO L175 Difference]: Start difference. First operand has 446 places, 903 transitions, 20985 flow. Second operand 25 states and 235 transitions. [2024-01-27 15:59:27,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 992 transitions, 23692 flow [2024-01-27 15:59:28,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 992 transitions, 23358 flow, removed 63 selfloop flow, removed 17 redundant places. [2024-01-27 15:59:28,636 INFO L231 Difference]: Finished difference. Result has 458 places, 913 transitions, 21260 flow [2024-01-27 15:59:28,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20655, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21260, PETRI_PLACES=458, PETRI_TRANSITIONS=913} [2024-01-27 15:59:28,637 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 436 predicate places. [2024-01-27 15:59:28,638 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 913 transitions, 21260 flow [2024-01-27 15:59:28,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 15:59:28,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:28,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:28,653 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 15:59:28,852 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 15:59:28,852 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 15:59:28,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1986398877, now seen corresponding path program 6 times [2024-01-27 15:59:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:28,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112905580] [2024-01-27 15:59:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:28,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:29,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112905580] [2024-01-27 15:59:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112905580] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716073248] [2024-01-27 15:59:29,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:59:29,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:29,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:29,632 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 15:59:29,634 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 15:59:29,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:59:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:29,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:59:29,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:30,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:30,006 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-01-27 15:59:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:30,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:30,400 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:59:30,400 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:59:30,448 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 15:59:30,448 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 15:59:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716073248] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:30,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:30,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2024-01-27 15:59:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722459468] [2024-01-27 15:59:30,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:59:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:59:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:59:30,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:30,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 913 transitions, 21260 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:30,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:30,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:30,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:33,517 INFO L124 PetriNetUnfolderBase]: 3217/6224 cut-off events. [2024-01-27 15:59:33,517 INFO L125 PetriNetUnfolderBase]: For 200169/200169 co-relation queries the response was YES. [2024-01-27 15:59:33,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62400 conditions, 6224 events. 3217/6224 cut-off events. For 200169/200169 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 47432 event pairs, 325 based on Foata normal form. 1/6225 useless extension candidates. Maximal degree in co-relation 62148. Up to 5832 conditions per place. [2024-01-27 15:59:33,584 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 870 selfloop transitions, 86 changer transitions 13/970 dead transitions. [2024-01-27 15:59:33,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 970 transitions, 23669 flow [2024-01-27 15:59:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:59:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:59:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 197 transitions. [2024-01-27 15:59:33,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37523809523809526 [2024-01-27 15:59:33,586 INFO L175 Difference]: Start difference. First operand has 458 places, 913 transitions, 21260 flow. Second operand 25 states and 197 transitions. [2024-01-27 15:59:33,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 970 transitions, 23669 flow [2024-01-27 15:59:34,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 970 transitions, 23419 flow, removed 31 selfloop flow, removed 18 redundant places. [2024-01-27 15:59:34,821 INFO L231 Difference]: Finished difference. Result has 467 places, 917 transitions, 21292 flow [2024-01-27 15:59:34,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21010, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21292, PETRI_PLACES=467, PETRI_TRANSITIONS=917} [2024-01-27 15:59:34,822 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 445 predicate places. [2024-01-27 15:59:34,822 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 917 transitions, 21292 flow [2024-01-27 15:59:34,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:34,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:34,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:34,843 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 15:59:35,036 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 15:59:35,037 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 15:59:35,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 283515967, now seen corresponding path program 7 times [2024-01-27 15:59:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618830129] [2024-01-27 15:59:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:35,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618830129] [2024-01-27 15:59:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618830129] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:35,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803292172] [2024-01-27 15:59:35,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:59:35,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:35,791 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 15:59:35,806 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 15:59:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:35,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:59:35,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:36,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:36,094 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-27 15:59:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:36,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:36,348 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:59:36,348 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:59:36,400 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 15:59:36,400 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 15:59:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:36,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803292172] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:36,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-01-27 15:59:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221031] [2024-01-27 15:59:36,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:59:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:59:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:59:36,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:36,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 917 transitions, 21292 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:36,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:36,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:36,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:40,135 INFO L124 PetriNetUnfolderBase]: 3283/6349 cut-off events. [2024-01-27 15:59:40,135 INFO L125 PetriNetUnfolderBase]: For 205096/205096 co-relation queries the response was YES. [2024-01-27 15:59:40,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63619 conditions, 6349 events. 3283/6349 cut-off events. For 205096/205096 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 48643 event pairs, 337 based on Foata normal form. 6/6355 useless extension candidates. Maximal degree in co-relation 63365. Up to 5905 conditions per place. [2024-01-27 15:59:40,205 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 909 selfloop transitions, 99 changer transitions 24/1033 dead transitions. [2024-01-27 15:59:40,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 1033 transitions, 24517 flow [2024-01-27 15:59:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:59:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:59:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 276 transitions. [2024-01-27 15:59:40,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423963133640553 [2024-01-27 15:59:40,207 INFO L175 Difference]: Start difference. First operand has 467 places, 917 transitions, 21292 flow. Second operand 31 states and 276 transitions. [2024-01-27 15:59:40,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 1033 transitions, 24517 flow [2024-01-27 15:59:41,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1033 transitions, 24300 flow, removed 30 selfloop flow, removed 18 redundant places. [2024-01-27 15:59:41,407 INFO L231 Difference]: Finished difference. Result has 488 places, 941 transitions, 21952 flow [2024-01-27 15:59:41,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21082, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21952, PETRI_PLACES=488, PETRI_TRANSITIONS=941} [2024-01-27 15:59:41,409 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 466 predicate places. [2024-01-27 15:59:41,409 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 941 transitions, 21952 flow [2024-01-27 15:59:41,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:41,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:41,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:41,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-27 15:59:41,620 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 15:59:41,620 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 15:59:41,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1434827739, now seen corresponding path program 8 times [2024-01-27 15:59:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626194865] [2024-01-27 15:59:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:42,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626194865] [2024-01-27 15:59:42,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626194865] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:42,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688576744] [2024-01-27 15:59:42,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:59:42,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:42,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:42,632 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 15:59:42,636 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 15:59:42,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:59:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:42,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:59:42,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:42,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:42,951 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-01-27 15:59:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:43,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:43,360 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:59:43,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:59:43,417 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 15:59:43,417 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 15:59:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:43,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688576744] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:43,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:43,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-27 15:59:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682014895] [2024-01-27 15:59:43,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:43,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:59:43,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:43,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:59:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:59:43,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:43,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 941 transitions, 21952 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 15:59:43,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:43,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:43,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:46,922 INFO L124 PetriNetUnfolderBase]: 3292/6376 cut-off events. [2024-01-27 15:59:46,922 INFO L125 PetriNetUnfolderBase]: For 215036/215036 co-relation queries the response was YES. [2024-01-27 15:59:46,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64824 conditions, 6376 events. 3292/6376 cut-off events. For 215036/215036 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49059 event pairs, 327 based on Foata normal form. 3/6379 useless extension candidates. Maximal degree in co-relation 64562. Up to 5899 conditions per place. [2024-01-27 15:59:46,993 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 898 selfloop transitions, 118 changer transitions 16/1033 dead transitions. [2024-01-27 15:59:46,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1033 transitions, 24899 flow [2024-01-27 15:59:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:59:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:59:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 247 transitions. [2024-01-27 15:59:46,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40558292282430214 [2024-01-27 15:59:46,994 INFO L175 Difference]: Start difference. First operand has 488 places, 941 transitions, 21952 flow. Second operand 29 states and 247 transitions. [2024-01-27 15:59:46,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1033 transitions, 24899 flow [2024-01-27 15:59:48,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1033 transitions, 24611 flow, removed 93 selfloop flow, removed 19 redundant places. [2024-01-27 15:59:48,354 INFO L231 Difference]: Finished difference. Result has 502 places, 955 transitions, 22314 flow [2024-01-27 15:59:48,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21670, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22314, PETRI_PLACES=502, PETRI_TRANSITIONS=955} [2024-01-27 15:59:48,355 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 480 predicate places. [2024-01-27 15:59:48,355 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 955 transitions, 22314 flow [2024-01-27 15:59:48,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 15:59:48,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:48,355 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:48,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:48,556 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 15:59:48,556 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 15:59:48,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -503129041, now seen corresponding path program 12 times [2024-01-27 15:59:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:48,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436833454] [2024-01-27 15:59:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:48,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436833454] [2024-01-27 15:59:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436833454] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688827254] [2024-01-27 15:59:48,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:59:48,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:48,720 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 15:59:48,747 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 15:59:48,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:59:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:48,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:59:48,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:48,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688827254] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:49,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:49,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-27 15:59:49,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460874314] [2024-01-27 15:59:49,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:49,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:59:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:59:49,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:59:49,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:49,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 955 transitions, 22314 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:59:49,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:49,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:54,991 INFO L124 PetriNetUnfolderBase]: 3312/6428 cut-off events. [2024-01-27 15:59:54,991 INFO L125 PetriNetUnfolderBase]: For 222364/222364 co-relation queries the response was YES. [2024-01-27 15:59:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65542 conditions, 6428 events. 3312/6428 cut-off events. For 222364/222364 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 49824 event pairs, 642 based on Foata normal form. 16/6444 useless extension candidates. Maximal degree in co-relation 65245. Up to 3332 conditions per place. [2024-01-27 15:59:55,076 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 714 selfloop transitions, 369 changer transitions 7/1091 dead transitions. [2024-01-27 15:59:55,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1091 transitions, 25886 flow [2024-01-27 15:59:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:59:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:59:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 287 transitions. [2024-01-27 15:59:55,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2024-01-27 15:59:55,077 INFO L175 Difference]: Start difference. First operand has 502 places, 955 transitions, 22314 flow. Second operand 34 states and 287 transitions. [2024-01-27 15:59:55,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1091 transitions, 25886 flow [2024-01-27 15:59:56,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1091 transitions, 25636 flow, removed 69 selfloop flow, removed 21 redundant places. [2024-01-27 15:59:56,786 INFO L231 Difference]: Finished difference. Result has 517 places, 966 transitions, 23228 flow [2024-01-27 15:59:56,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=22114, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=23228, PETRI_PLACES=517, PETRI_TRANSITIONS=966} [2024-01-27 15:59:56,787 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 495 predicate places. [2024-01-27 15:59:56,787 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 966 transitions, 23228 flow [2024-01-27 15:59:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:59:56,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:56,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:56,800 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 15:59:56,992 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 15:59:56,993 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 15:59:56,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1231400929, now seen corresponding path program 9 times [2024-01-27 15:59:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:56,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732946594] [2024-01-27 15:59:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732946594] [2024-01-27 15:59:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732946594] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915312314] [2024-01-27 15:59:57,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:59:57,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:57,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:57,725 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 15:59:57,726 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 15:59:57,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:59:57,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:57,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:59:57,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:58,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:58,109 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-27 15:59:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:58,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:58,380 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:59:58,380 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:59:58,440 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 15:59:58,440 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 15:59:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915312314] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:58,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:58,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-27 15:59:58,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642587092] [2024-01-27 15:59:58,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:58,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:59:58,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:58,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:59:58,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:59:58,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:58,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 966 transitions, 23228 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:58,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:58,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:02,269 INFO L124 PetriNetUnfolderBase]: 3443/6651 cut-off events. [2024-01-27 16:00:02,269 INFO L125 PetriNetUnfolderBase]: For 237093/237093 co-relation queries the response was YES. [2024-01-27 16:00:02,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69289 conditions, 6651 events. 3443/6651 cut-off events. For 237093/237093 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51630 event pairs, 343 based on Foata normal form. 6/6657 useless extension candidates. Maximal degree in co-relation 68983. Up to 6208 conditions per place. [2024-01-27 16:00:02,351 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 993 selfloop transitions, 107 changer transitions 19/1120 dead transitions. [2024-01-27 16:00:02,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1120 transitions, 27499 flow [2024-01-27 16:00:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 16:00:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 16:00:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 315 transitions. [2024-01-27 16:00:02,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40540540540540543 [2024-01-27 16:00:02,354 INFO L175 Difference]: Start difference. First operand has 517 places, 966 transitions, 23228 flow. Second operand 37 states and 315 transitions. [2024-01-27 16:00:02,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1120 transitions, 27499 flow [2024-01-27 16:00:03,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1120 transitions, 26243 flow, removed 115 selfloop flow, removed 24 redundant places. [2024-01-27 16:00:03,990 INFO L231 Difference]: Finished difference. Result has 544 places, 1017 transitions, 23799 flow [2024-01-27 16:00:03,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=22068, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=875, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23799, PETRI_PLACES=544, PETRI_TRANSITIONS=1017} [2024-01-27 16:00:03,990 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 522 predicate places. [2024-01-27 16:00:03,991 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1017 transitions, 23799 flow [2024-01-27 16:00:03,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:03,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:03,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:04,002 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 16:00:04,191 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 16:00:04,192 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 16:00:04,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1494686185, now seen corresponding path program 10 times [2024-01-27 16:00:04,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:04,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843062221] [2024-01-27 16:00:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:04,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:04,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843062221] [2024-01-27 16:00:04,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843062221] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805482590] [2024-01-27 16:00:04,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:00:04,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:04,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:04,822 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 16:00:04,824 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 16:00:04,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:00:04,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:04,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 16:00:04,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:05,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:05,209 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-27 16:00:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:00:05,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:05,588 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-27 16:00:05,588 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-27 16:00:05,709 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 16:00:05,710 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 16:00:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:05,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805482590] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:05,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:05,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-27 16:00:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197437561] [2024-01-27 16:00:05,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:05,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 16:00:05,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:05,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 16:00:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-01-27 16:00:05,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:05,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1017 transitions, 23799 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:05,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:05,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:05,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:09,505 INFO L124 PetriNetUnfolderBase]: 3515/6778 cut-off events. [2024-01-27 16:00:09,505 INFO L125 PetriNetUnfolderBase]: For 238784/238784 co-relation queries the response was YES. [2024-01-27 16:00:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70019 conditions, 6778 events. 3515/6778 cut-off events. For 238784/238784 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 52740 event pairs, 367 based on Foata normal form. 6/6784 useless extension candidates. Maximal degree in co-relation 69731. Up to 6389 conditions per place. [2024-01-27 16:00:09,779 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1030 selfloop transitions, 86 changer transitions 16/1133 dead transitions. [2024-01-27 16:00:09,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1133 transitions, 27205 flow [2024-01-27 16:00:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 16:00:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 16:00:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 275 transitions. [2024-01-27 16:00:09,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40922619047619047 [2024-01-27 16:00:09,784 INFO L175 Difference]: Start difference. First operand has 544 places, 1017 transitions, 23799 flow. Second operand 32 states and 275 transitions. [2024-01-27 16:00:09,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1133 transitions, 27205 flow [2024-01-27 16:00:11,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1133 transitions, 26668 flow, removed 221 selfloop flow, removed 17 redundant places. [2024-01-27 16:00:11,508 INFO L231 Difference]: Finished difference. Result has 568 places, 1046 transitions, 24252 flow [2024-01-27 16:00:11,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23262, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=24252, PETRI_PLACES=568, PETRI_TRANSITIONS=1046} [2024-01-27 16:00:11,509 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 546 predicate places. [2024-01-27 16:00:11,509 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1046 transitions, 24252 flow [2024-01-27 16:00:11,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:11,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:11,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:11,521 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 16:00:11,712 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 16:00:11,712 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 16:00:11,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1214476831, now seen corresponding path program 11 times [2024-01-27 16:00:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772013623] [2024-01-27 16:00:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:11,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772013623] [2024-01-27 16:00:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772013623] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751582875] [2024-01-27 16:00:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:00:12,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:12,406 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 16:00:12,406 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 16:00:12,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 16:00:12,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:12,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 16:00:12,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:12,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:12,712 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-01-27 16:00:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:00:12,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:13,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:13,045 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 158 [2024-01-27 16:00:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751582875] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:13,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2024-01-27 16:00:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212361536] [2024-01-27 16:00:13,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 16:00:13,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 16:00:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2024-01-27 16:00:13,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:13,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1046 transitions, 24252 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 16:00:13,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:13,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:13,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:16,531 INFO L124 PetriNetUnfolderBase]: 3513/6803 cut-off events. [2024-01-27 16:00:16,531 INFO L125 PetriNetUnfolderBase]: For 245753/245753 co-relation queries the response was YES. [2024-01-27 16:00:16,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70524 conditions, 6803 events. 3513/6803 cut-off events. For 245753/245753 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53078 event pairs, 363 based on Foata normal form. 2/6805 useless extension candidates. Maximal degree in co-relation 70225. Up to 6436 conditions per place. [2024-01-27 16:00:16,620 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1029 selfloop transitions, 71 changer transitions 10/1111 dead transitions. [2024-01-27 16:00:16,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1111 transitions, 27024 flow [2024-01-27 16:00:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 16:00:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 16:00:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 205 transitions. [2024-01-27 16:00:16,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-01-27 16:00:16,622 INFO L175 Difference]: Start difference. First operand has 568 places, 1046 transitions, 24252 flow. Second operand 25 states and 205 transitions. [2024-01-27 16:00:16,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1111 transitions, 27024 flow [2024-01-27 16:00:18,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1111 transitions, 26804 flow, removed 79 selfloop flow, removed 14 redundant places. [2024-01-27 16:00:18,632 INFO L231 Difference]: Finished difference. Result has 584 places, 1050 transitions, 24310 flow [2024-01-27 16:00:18,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24034, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=975, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=24310, PETRI_PLACES=584, PETRI_TRANSITIONS=1050} [2024-01-27 16:00:18,634 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 562 predicate places. [2024-01-27 16:00:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 1050 transitions, 24310 flow [2024-01-27 16:00:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 16:00:18,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:18,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:18,653 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 16:00:18,853 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 16:00:18,853 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 16:00:18,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash 197119427, now seen corresponding path program 12 times [2024-01-27 16:00:18,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:18,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356455616] [2024-01-27 16:00:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:18,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356455616] [2024-01-27 16:00:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356455616] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948131720] [2024-01-27 16:00:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:00:19,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:19,609 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 16:00:19,609 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 16:00:19,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 16:00:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:19,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 16:00:19,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:19,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:19,945 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-01-27 16:00:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:00:20,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:20,255 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 16:00:20,255 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 16:00:20,322 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 16:00:20,323 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 16:00:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948131720] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:20,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-01-27 16:00:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330390590] [2024-01-27 16:00:20,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 16:00:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 16:00:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2024-01-27 16:00:20,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:20,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 1050 transitions, 24310 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:24,204 INFO L124 PetriNetUnfolderBase]: 3692/7129 cut-off events. [2024-01-27 16:00:24,204 INFO L125 PetriNetUnfolderBase]: For 264513/264513 co-relation queries the response was YES. [2024-01-27 16:00:24,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73949 conditions, 7129 events. 3692/7129 cut-off events. For 264513/264513 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55957 event pairs, 357 based on Foata normal form. 4/7133 useless extension candidates. Maximal degree in co-relation 73645. Up to 6407 conditions per place. [2024-01-27 16:00:24,303 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1061 selfloop transitions, 121 changer transitions 19/1202 dead transitions. [2024-01-27 16:00:24,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1202 transitions, 28949 flow [2024-01-27 16:00:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 16:00:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 16:00:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 251 transitions. [2024-01-27 16:00:24,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121510673234811 [2024-01-27 16:00:24,304 INFO L175 Difference]: Start difference. First operand has 584 places, 1050 transitions, 24310 flow. Second operand 29 states and 251 transitions. [2024-01-27 16:00:24,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1202 transitions, 28949 flow [2024-01-27 16:00:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1202 transitions, 28755 flow, removed 39 selfloop flow, removed 17 redundant places. [2024-01-27 16:00:26,537 INFO L231 Difference]: Finished difference. Result has 604 places, 1089 transitions, 25583 flow [2024-01-27 16:00:26,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24126, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=25583, PETRI_PLACES=604, PETRI_TRANSITIONS=1089} [2024-01-27 16:00:26,538 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 582 predicate places. [2024-01-27 16:00:26,538 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1089 transitions, 25583 flow [2024-01-27 16:00:26,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:26,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:26,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:26,551 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 16:00:26,739 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 16:00:26,739 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 16:00:26,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash -676621253, now seen corresponding path program 13 times [2024-01-27 16:00:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:26,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741796105] [2024-01-27 16:00:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:27,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:27,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741796105] [2024-01-27 16:00:27,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741796105] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:27,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205456932] [2024-01-27 16:00:27,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:00:27,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:27,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:27,522 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 16:00:27,525 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 16:00:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:27,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 16:00:27,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:27,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:27,814 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-01-27 16:00:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:00:27,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:28,123 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-27 16:00:28,124 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-27 16:00:28,244 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 16:00:28,244 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 16:00:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:28,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205456932] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:28,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:28,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-27 16:00:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096145642] [2024-01-27 16:00:28,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:28,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 16:00:28,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 16:00:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2024-01-27 16:00:28,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:28,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1089 transitions, 25583 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:28,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:28,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:28,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:32,030 INFO L124 PetriNetUnfolderBase]: 3688/7127 cut-off events. [2024-01-27 16:00:32,030 INFO L125 PetriNetUnfolderBase]: For 268240/268240 co-relation queries the response was YES. [2024-01-27 16:00:32,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74253 conditions, 7127 events. 3688/7127 cut-off events. For 268240/268240 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 56111 event pairs, 391 based on Foata normal form. 2/7129 useless extension candidates. Maximal degree in co-relation 73917. Up to 6730 conditions per place. [2024-01-27 16:00:32,123 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1072 selfloop transitions, 76 changer transitions 7/1156 dead transitions. [2024-01-27 16:00:32,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1156 transitions, 28431 flow [2024-01-27 16:00:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 16:00:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 16:00:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 218 transitions. [2024-01-27 16:00:32,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992673992673993 [2024-01-27 16:00:32,124 INFO L175 Difference]: Start difference. First operand has 604 places, 1089 transitions, 25583 flow. Second operand 26 states and 218 transitions. [2024-01-27 16:00:32,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1156 transitions, 28431 flow [2024-01-27 16:00:34,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1156 transitions, 28099 flow, removed 117 selfloop flow, removed 21 redundant places. [2024-01-27 16:00:34,391 INFO L231 Difference]: Finished difference. Result has 611 places, 1093 transitions, 25534 flow [2024-01-27 16:00:34,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25259, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25534, PETRI_PLACES=611, PETRI_TRANSITIONS=1093} [2024-01-27 16:00:34,391 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 589 predicate places. [2024-01-27 16:00:34,391 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1093 transitions, 25534 flow [2024-01-27 16:00:34,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:34,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:34,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:34,402 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 16:00:34,592 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 16:00:34,592 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 16:00:34,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash 349046465, now seen corresponding path program 13 times [2024-01-27 16:00:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623506435] [2024-01-27 16:00:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:34,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:34,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623506435] [2024-01-27 16:00:34,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623506435] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527026551] [2024-01-27 16:00:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:00:34,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:34,756 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 16:00:34,783 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 16:00:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:34,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 16:00:34,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:35,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527026551] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:35,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:35,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-27 16:00:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749256516] [2024-01-27 16:00:35,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:35,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 16:00:35,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:35,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 16:00:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-01-27 16:00:35,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:35,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1093 transitions, 25534 flow. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 16:00:35,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:35,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:35,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:40,172 INFO L124 PetriNetUnfolderBase]: 3809/7336 cut-off events. [2024-01-27 16:00:40,172 INFO L125 PetriNetUnfolderBase]: For 278132/278132 co-relation queries the response was YES. [2024-01-27 16:00:40,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76005 conditions, 7336 events. 3809/7336 cut-off events. For 278132/278132 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 57941 event pairs, 1064 based on Foata normal form. 40/7376 useless extension candidates. Maximal degree in co-relation 75668. Up to 5645 conditions per place. [2024-01-27 16:00:40,284 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 933 selfloop transitions, 287 changer transitions 0/1221 dead transitions. [2024-01-27 16:00:40,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 1221 transitions, 29282 flow [2024-01-27 16:00:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 16:00:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 16:00:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 264 transitions. [2024-01-27 16:00:40,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-01-27 16:00:40,286 INFO L175 Difference]: Start difference. First operand has 611 places, 1093 transitions, 25534 flow. Second operand 30 states and 264 transitions. [2024-01-27 16:00:40,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 1221 transitions, 29282 flow [2024-01-27 16:00:42,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1221 transitions, 28975 flow, removed 41 selfloop flow, removed 22 redundant places. [2024-01-27 16:00:42,803 INFO L231 Difference]: Finished difference. Result has 619 places, 1134 transitions, 26902 flow [2024-01-27 16:00:42,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25181, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26902, PETRI_PLACES=619, PETRI_TRANSITIONS=1134} [2024-01-27 16:00:42,804 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 597 predicate places. [2024-01-27 16:00:42,805 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1134 transitions, 26902 flow [2024-01-27 16:00:42,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 16:00:42,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:42,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:42,819 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 16:00:43,005 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 16:00:43,006 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 16:00:43,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 276433851, now seen corresponding path program 14 times [2024-01-27 16:00:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:43,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139975572] [2024-01-27 16:00:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:43,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:43,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139975572] [2024-01-27 16:00:43,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139975572] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:43,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332007222] [2024-01-27 16:00:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:00:43,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:43,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:43,748 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 16:00:43,748 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 16:00:43,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:00:43,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:43,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 16:00:43,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:44,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:44,071 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-01-27 16:00:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:44,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:44,361 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 16:00:44,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 16:00:44,413 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-27 16:00:44,413 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-27 16:00:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:44,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332007222] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:44,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:44,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 25 [2024-01-27 16:00:44,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330390423] [2024-01-27 16:00:44,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:44,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 16:00:44,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:44,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 16:00:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-01-27 16:00:44,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:44,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1134 transitions, 26902 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:44,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:44,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:44,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:48,617 INFO L124 PetriNetUnfolderBase]: 3843/7395 cut-off events. [2024-01-27 16:00:48,617 INFO L125 PetriNetUnfolderBase]: For 276632/276632 co-relation queries the response was YES. [2024-01-27 16:00:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77216 conditions, 7395 events. 3843/7395 cut-off events. For 276632/276632 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 58354 event pairs, 411 based on Foata normal form. 2/7397 useless extension candidates. Maximal degree in co-relation 76876. Up to 6964 conditions per place. [2024-01-27 16:00:48,729 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1108 selfloop transitions, 106 changer transitions 6/1221 dead transitions. [2024-01-27 16:00:48,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1221 transitions, 30273 flow [2024-01-27 16:00:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 16:00:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 16:00:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 241 transitions. [2024-01-27 16:00:48,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37019969278033793 [2024-01-27 16:00:48,731 INFO L175 Difference]: Start difference. First operand has 619 places, 1134 transitions, 26902 flow. Second operand 31 states and 241 transitions. [2024-01-27 16:00:48,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 1221 transitions, 30273 flow