./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:19:38,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:19:38,140 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:19:38,150 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:19:38,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:19:38,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:19:38,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:19:38,179 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:19:38,180 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:19:38,183 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:19:38,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:19:38,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:19:38,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:19:38,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:19:38,185 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:19:38,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:19:38,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:19:38,186 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:19:38,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:19:38,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:19:38,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:19:38,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:19:38,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:19:38,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:19:38,187 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:19:38,188 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:19:38,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:19:38,188 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:19:38,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:19:38,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:19:38,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:19:38,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:19:38,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:19:38,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:19:38,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:19:38,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:19:38,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:19:38,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:19:38,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:19:38,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:19:38,191 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:19:38,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:19:38,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:19:38,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-01-27 15:19:38,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:19:38,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:19:38,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:19:38,426 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:19:38,426 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:19:38,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-01-27 15:19:39,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:19:39,657 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:19:39,658 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-01-27 15:19:39,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b56b634d/2fbde71792df4504bc2ef174738f678b/FLAG8fc57c55e [2024-01-27 15:19:39,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b56b634d/2fbde71792df4504bc2ef174738f678b [2024-01-27 15:19:39,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:19:39,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:19:39,682 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:19:39,682 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:19:39,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:19:39,690 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425a01f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39, skipping insertion in model container [2024-01-27 15:19:39,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,710 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:19:39,828 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-01-27 15:19:39,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:19:39,842 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:19:39,857 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-01-27 15:19:39,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:19:39,872 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:19:39,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39 WrapperNode [2024-01-27 15:19:39,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:19:39,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:19:39,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:19:39,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:19:39,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,909 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 201 [2024-01-27 15:19:39,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:19:39,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:19:39,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:19:39,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:19:39,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,935 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 6, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 2, 1, 1]. [2024-01-27 15:19:39,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:19:39,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:19:39,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:19:39,954 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:19:39,956 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (1/1) ... [2024-01-27 15:19:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:19:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:40,012 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 15:19:40,032 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 15:19:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:19:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:19:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:19:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:19:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:19:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:19:40,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:19:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:19:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:19:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:19:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:19:40,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:19:40,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:19:40,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:19:40,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:19:40,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:19:40,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:19:40,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:19:40,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:19:40,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:19:40,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:19:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:19:40,066 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 15:19:40,185 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:19:40,188 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:19:40,473 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:19:40,473 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:19:40,756 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:19:40,756 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:19:40,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:19:40 BoogieIcfgContainer [2024-01-27 15:19:40,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:19:40,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:19:40,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:19:40,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:19:40,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:19:39" (1/3) ... [2024-01-27 15:19:40,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea3e190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:19:40, skipping insertion in model container [2024-01-27 15:19:40,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:39" (2/3) ... [2024-01-27 15:19:40,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea3e190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:19:40, skipping insertion in model container [2024-01-27 15:19:40,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:19:40" (3/3) ... [2024-01-27 15:19:40,764 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-01-27 15:19:40,770 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:19:40,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:19:40,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:19:40,777 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:19:40,808 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:19:40,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 60 flow [2024-01-27 15:19:40,866 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2024-01-27 15:19:40,867 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:19:40,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 4/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-01-27 15:19:40,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 60 flow [2024-01-27 15:19:40,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 20 transitions, 52 flow [2024-01-27 15:19:40,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:19:40,886 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;@780618e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:19:40,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:19:40,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:19:40,899 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2024-01-27 15:19:40,899 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:19:40,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:40,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:40,900 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 15:19:40,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1874240486, now seen corresponding path program 1 times [2024-01-27 15:19:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:40,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543692968] [2024-01-27 15:19:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:40,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:41,313 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 15:19:41,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543692968] [2024-01-27 15:19:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543692968] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:41,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:41,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:19:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687594948] [2024-01-27 15:19:41,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:41,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:19:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:19:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:19:41,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:41,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:41,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:41,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:41,420 INFO L124 PetriNetUnfolderBase]: 42/80 cut-off events. [2024-01-27 15:19:41,420 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:19:41,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 80 events. 42/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 120. Up to 78 conditions per place. [2024-01-27 15:19:41,423 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2024-01-27 15:19:41,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2024-01-27 15:19:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:19:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:19:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2024-01-27 15:19:41,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-01-27 15:19:41,435 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 32 transitions. [2024-01-27 15:19:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 98 flow [2024-01-27 15:19:41,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:19:41,440 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2024-01-27 15:19:41,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2024-01-27 15:19:41,445 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-01-27 15:19:41,446 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2024-01-27 15:19:41,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:41,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:41,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:19:41,447 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 15:19:41,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash 391187536, now seen corresponding path program 1 times [2024-01-27 15:19:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:41,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309247593] [2024-01-27 15:19:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:41,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:19:41,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:41,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309247593] [2024-01-27 15:19:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309247593] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:41,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856283969] [2024-01-27 15:19:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:41,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:41,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:41,585 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 15:19:41,588 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 15:19:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:41,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:41,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:41,742 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 15:19:41,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:41,761 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 15:19:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856283969] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:41,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:41,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-01-27 15:19:41,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664014732] [2024-01-27 15:19:41,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:41,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:19:41,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:19:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:19:41,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:41,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:41,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:41,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:41,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:41,826 INFO L124 PetriNetUnfolderBase]: 42/86 cut-off events. [2024-01-27 15:19:41,827 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:19:41,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 86 events. 42/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 164. Up to 78 conditions per place. [2024-01-27 15:19:41,828 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2024-01-27 15:19:41,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 144 flow [2024-01-27 15:19:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:19:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:19:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 51 transitions. [2024-01-27 15:19:41,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-01-27 15:19:41,829 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 51 transitions. [2024-01-27 15:19:41,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 144 flow [2024-01-27 15:19:41,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:41,831 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2024-01-27 15:19:41,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-01-27 15:19:41,832 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2024-01-27 15:19:41,832 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2024-01-27 15:19:41,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:41,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:41,832 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:41,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:19:42,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:42,045 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 15:19:42,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -355590994, now seen corresponding path program 2 times [2024-01-27 15:19:42,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:42,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633967040] [2024-01-27 15:19:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:19:42,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633967040] [2024-01-27 15:19:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633967040] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319941266] [2024-01-27 15:19:42,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:42,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:42,292 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 15:19:42,294 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 15:19:42,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:19:42,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:42,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:42,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:19:42,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319941266] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:42,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:42,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-27 15:19:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294704506] [2024-01-27 15:19:42,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:19:42,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:42,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:42,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:42,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:42,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:42,530 INFO L124 PetriNetUnfolderBase]: 66/135 cut-off events. [2024-01-27 15:19:42,530 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:19:42,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 135 events. 66/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 318 event pairs, 24 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 254. Up to 86 conditions per place. [2024-01-27 15:19:42,531 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 39 selfloop transitions, 3 changer transitions 2/45 dead transitions. [2024-01-27 15:19:42,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 254 flow [2024-01-27 15:19:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2024-01-27 15:19:42,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-01-27 15:19:42,533 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 49 transitions. [2024-01-27 15:19:42,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 254 flow [2024-01-27 15:19:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 238 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:42,535 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2024-01-27 15:19:42,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-27 15:19:42,536 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2024-01-27 15:19:42,536 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2024-01-27 15:19:42,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:42,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:42,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:42,564 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 15:19:42,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-27 15:19:42,765 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 15:19:42,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash 207705142, now seen corresponding path program 3 times [2024-01-27 15:19:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488040532] [2024-01-27 15:19:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:42,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:19:42,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:42,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488040532] [2024-01-27 15:19:42,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488040532] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:42,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268622670] [2024-01-27 15:19:42,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:42,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:42,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:42,863 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 15:19:42,902 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 15:19:42,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:19:42,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:42,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:42,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:19:42,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:42,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268622670] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:42,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:42,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-27 15:19:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530149932] [2024-01-27 15:19:42,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:42,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:19:42,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:42,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:42,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:42,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:42,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:43,082 INFO L124 PetriNetUnfolderBase]: 102/205 cut-off events. [2024-01-27 15:19:43,082 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-01-27 15:19:43,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 205 events. 102/205 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 605 event pairs, 42 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 484. Up to 138 conditions per place. [2024-01-27 15:19:43,084 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 45 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-01-27 15:19:43,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 294 flow [2024-01-27 15:19:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-01-27 15:19:43,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-01-27 15:19:43,085 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 47 transitions. [2024-01-27 15:19:43,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 294 flow [2024-01-27 15:19:43,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 283 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:43,100 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 148 flow [2024-01-27 15:19:43,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-27 15:19:43,101 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-01-27 15:19:43,101 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 148 flow [2024-01-27 15:19:43,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:43,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:43,101 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:43,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:19:43,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:43,314 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 15:19:43,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash 810424690, now seen corresponding path program 4 times [2024-01-27 15:19:43,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:43,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8859869] [2024-01-27 15:19:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:43,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:19:43,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8859869] [2024-01-27 15:19:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8859869] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472229304] [2024-01-27 15:19:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:19:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:43,439 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 15:19:43,464 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 15:19:43,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:19:43,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:43,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:19:43,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:19:43,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:19:43,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472229304] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:43,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:43,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:19:43,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460041311] [2024-01-27 15:19:43,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:43,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:19:43,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:19:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:19:43,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:43,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:43,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:43,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:43,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:43,718 INFO L124 PetriNetUnfolderBase]: 102/207 cut-off events. [2024-01-27 15:19:43,718 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-01-27 15:19:43,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 207 events. 102/207 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 574 event pairs, 74 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 564. Up to 194 conditions per place. [2024-01-27 15:19:43,722 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 21 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2024-01-27 15:19:43,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 226 flow [2024-01-27 15:19:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:19:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:19:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2024-01-27 15:19:43,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32298136645962733 [2024-01-27 15:19:43,724 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 148 flow. Second operand 7 states and 52 transitions. [2024-01-27 15:19:43,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 226 flow [2024-01-27 15:19:43,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:43,728 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 190 flow [2024-01-27 15:19:43,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2024-01-27 15:19:43,730 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2024-01-27 15:19:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 190 flow [2024-01-27 15:19:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:43,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:19:43,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:43,942 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 15:19:43,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash 916282052, now seen corresponding path program 5 times [2024-01-27 15:19:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159241670] [2024-01-27 15:19:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:44,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:44,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159241670] [2024-01-27 15:19:44,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159241670] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:44,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:44,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213949727] [2024-01-27 15:19:44,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:44,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:44,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:44,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:44,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:44,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:44,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:44,133 INFO L124 PetriNetUnfolderBase]: 118/235 cut-off events. [2024-01-27 15:19:44,134 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-01-27 15:19:44,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 235 events. 118/235 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 772 event pairs, 14 based on Foata normal form. 12/219 useless extension candidates. Maximal degree in co-relation 606. Up to 188 conditions per place. [2024-01-27 15:19:44,135 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 43 selfloop transitions, 5 changer transitions 1/50 dead transitions. [2024-01-27 15:19:44,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 342 flow [2024-01-27 15:19:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-01-27 15:19:44,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-01-27 15:19:44,136 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 190 flow. Second operand 4 states and 44 transitions. [2024-01-27 15:19:44,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 342 flow [2024-01-27 15:19:44,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 318 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-27 15:19:44,138 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 197 flow [2024-01-27 15:19:44,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-01-27 15:19:44,139 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2024-01-27 15:19:44,139 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 197 flow [2024-01-27 15:19:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:44,139 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:19:44,139 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 15:19:44,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -220250244, now seen corresponding path program 6 times [2024-01-27 15:19:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:44,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908415972] [2024-01-27 15:19:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:44,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908415972] [2024-01-27 15:19:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908415972] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:44,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:44,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136299636] [2024-01-27 15:19:44,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:44,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:44,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:44,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:44,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:44,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:44,301 INFO L124 PetriNetUnfolderBase]: 114/224 cut-off events. [2024-01-27 15:19:44,301 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2024-01-27 15:19:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 224 events. 114/224 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 652 event pairs, 24 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 647. Up to 162 conditions per place. [2024-01-27 15:19:44,303 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 42 selfloop transitions, 6 changer transitions 1/50 dead transitions. [2024-01-27 15:19:44,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 351 flow [2024-01-27 15:19:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-01-27 15:19:44,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-01-27 15:19:44,304 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 197 flow. Second operand 4 states and 42 transitions. [2024-01-27 15:19:44,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 351 flow [2024-01-27 15:19:44,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 50 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:44,306 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 230 flow [2024-01-27 15:19:44,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-01-27 15:19:44,306 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2024-01-27 15:19:44,307 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 230 flow [2024-01-27 15:19:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:44,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:19:44,307 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 15:19:44,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash -957448498, now seen corresponding path program 1 times [2024-01-27 15:19:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:44,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226126626] [2024-01-27 15:19:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-27 15:19:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226126626] [2024-01-27 15:19:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226126626] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:44,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:44,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984770306] [2024-01-27 15:19:44,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:44,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:44,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:44,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:44,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:44,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:44,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:44,509 INFO L124 PetriNetUnfolderBase]: 99/194 cut-off events. [2024-01-27 15:19:44,509 INFO L125 PetriNetUnfolderBase]: For 428/428 co-relation queries the response was YES. [2024-01-27 15:19:44,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 194 events. 99/194 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 517 event pairs, 36 based on Foata normal form. 6/174 useless extension candidates. Maximal degree in co-relation 617. Up to 148 conditions per place. [2024-01-27 15:19:44,510 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 43 selfloop transitions, 6 changer transitions 3/53 dead transitions. [2024-01-27 15:19:44,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 399 flow [2024-01-27 15:19:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-01-27 15:19:44,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:19:44,511 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 230 flow. Second operand 4 states and 46 transitions. [2024-01-27 15:19:44,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 399 flow [2024-01-27 15:19:44,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:44,513 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 251 flow [2024-01-27 15:19:44,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-01-27 15:19:44,514 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-01-27 15:19:44,514 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 251 flow [2024-01-27 15:19:44,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:44,515 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:44,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:19:44,515 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 15:19:44,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:44,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1695590835, now seen corresponding path program 1 times [2024-01-27 15:19:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:44,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921339810] [2024-01-27 15:19:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-27 15:19:44,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:44,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921339810] [2024-01-27 15:19:44,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921339810] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:44,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:44,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:44,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298532958] [2024-01-27 15:19:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:44,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:44,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:44,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:44,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:44,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:44,700 INFO L124 PetriNetUnfolderBase]: 85/163 cut-off events. [2024-01-27 15:19:44,700 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2024-01-27 15:19:44,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 163 events. 85/163 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 376 event pairs, 29 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 554. Up to 125 conditions per place. [2024-01-27 15:19:44,701 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 44 selfloop transitions, 7 changer transitions 1/53 dead transitions. [2024-01-27 15:19:44,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 419 flow [2024-01-27 15:19:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-01-27 15:19:44,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:19:44,702 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 251 flow. Second operand 4 states and 46 transitions. [2024-01-27 15:19:44,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 419 flow [2024-01-27 15:19:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 393 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:44,704 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 264 flow [2024-01-27 15:19:44,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-01-27 15:19:44,705 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-01-27 15:19:44,705 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 264 flow [2024-01-27 15:19:44,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:44,705 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:44,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:19:44,706 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 15:19:44,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1557131379, now seen corresponding path program 1 times [2024-01-27 15:19:44,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:44,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721875423] [2024-01-27 15:19:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721875423] [2024-01-27 15:19:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721875423] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330480814] [2024-01-27 15:19:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:45,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:45,460 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 15:19:45,461 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 15:19:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:45,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:19:45,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:45,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:45,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-27 15:19:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:45,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:46,082 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:19:46,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 80 [2024-01-27 15:19:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330480814] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:46,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-01-27 15:19:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196402250] [2024-01-27 15:19:46,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:19:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:19:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:19:46,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:46,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 264 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:46,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:46,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:46,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:46,529 INFO L124 PetriNetUnfolderBase]: 152/284 cut-off events. [2024-01-27 15:19:46,529 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-01-27 15:19:46,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 284 events. 152/284 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 900 event pairs, 15 based on Foata normal form. 1/231 useless extension candidates. Maximal degree in co-relation 949. Up to 109 conditions per place. [2024-01-27 15:19:46,531 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 59 selfloop transitions, 18 changer transitions 1/79 dead transitions. [2024-01-27 15:19:46,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 579 flow [2024-01-27 15:19:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:19:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:19:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-01-27 15:19:46,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3675889328063241 [2024-01-27 15:19:46,532 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 264 flow. Second operand 11 states and 93 transitions. [2024-01-27 15:19:46,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 579 flow [2024-01-27 15:19:46,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 545 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:46,535 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 357 flow [2024-01-27 15:19:46,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=357, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-01-27 15:19:46,536 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 38 predicate places. [2024-01-27 15:19:46,538 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 357 flow [2024-01-27 15:19:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:46,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:46,538 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:46,567 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 15:19:46,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:19:46,751 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 15:19:46,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash 63224523, now seen corresponding path program 2 times [2024-01-27 15:19:46,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:46,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938732105] [2024-01-27 15:19:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:46,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:19:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938732105] [2024-01-27 15:19:47,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938732105] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745620769] [2024-01-27 15:19:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:47,727 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 15:19:47,766 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 15:19:47,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:19:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:47,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:19:47,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:47,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:47,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:19:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:47,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:48,258 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:19:48,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:19:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745620769] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:48,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:48,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 26 [2024-01-27 15:19:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047251253] [2024-01-27 15:19:48,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:19:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:19:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:19:48,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:48,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 357 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:48,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:48,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:48,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:48,859 INFO L124 PetriNetUnfolderBase]: 174/323 cut-off events. [2024-01-27 15:19:48,859 INFO L125 PetriNetUnfolderBase]: For 879/879 co-relation queries the response was YES. [2024-01-27 15:19:48,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 323 events. 174/323 cut-off events. For 879/879 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1072 event pairs, 30 based on Foata normal form. 1/324 useless extension candidates. Maximal degree in co-relation 1161. Up to 246 conditions per place. [2024-01-27 15:19:48,861 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 44 selfloop transitions, 29 changer transitions 4/78 dead transitions. [2024-01-27 15:19:48,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 625 flow [2024-01-27 15:19:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:19:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:19:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 108 transitions. [2024-01-27 15:19:48,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29347826086956524 [2024-01-27 15:19:48,863 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 357 flow. Second operand 16 states and 108 transitions. [2024-01-27 15:19:48,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 625 flow [2024-01-27 15:19:48,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 602 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:48,866 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 477 flow [2024-01-27 15:19:48,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=477, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2024-01-27 15:19:48,866 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 54 predicate places. [2024-01-27 15:19:48,866 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 477 flow [2024-01-27 15:19:48,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:48,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:48,867 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:48,896 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 15:19:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:49,097 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 15:19:49,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash 774167091, now seen corresponding path program 3 times [2024-01-27 15:19:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:49,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248661149] [2024-01-27 15:19:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:49,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:49,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:49,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248661149] [2024-01-27 15:19:49,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248661149] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:49,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550865466] [2024-01-27 15:19:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:49,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:49,593 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 15:19:49,634 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 15:19:49,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:19:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:49,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:19:49,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:49,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:49,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:19:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:49,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:50,106 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:19:50,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:19:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:50,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550865466] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:50,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:50,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-01-27 15:19:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550316751] [2024-01-27 15:19:50,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:50,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:19:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:50,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:19:50,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:19:50,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:50,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 477 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:50,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:50,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:50,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:50,521 INFO L124 PetriNetUnfolderBase]: 176/332 cut-off events. [2024-01-27 15:19:50,521 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-01-27 15:19:50,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1450 conditions, 332 events. 176/332 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1142 event pairs, 34 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1376. Up to 242 conditions per place. [2024-01-27 15:19:50,524 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 50 selfloop transitions, 24 changer transitions 2/77 dead transitions. [2024-01-27 15:19:50,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 707 flow [2024-01-27 15:19:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:19:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:19:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2024-01-27 15:19:50,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31521739130434784 [2024-01-27 15:19:50,525 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 477 flow. Second operand 12 states and 87 transitions. [2024-01-27 15:19:50,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 707 flow [2024-01-27 15:19:50,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 629 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-01-27 15:19:50,528 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 486 flow [2024-01-27 15:19:50,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=486, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-01-27 15:19:50,529 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 57 predicate places. [2024-01-27 15:19:50,529 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 486 flow [2024-01-27 15:19:50,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:50,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:50,530 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:50,552 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 15:19:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:50,742 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 15:19:50,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1452210005, now seen corresponding path program 4 times [2024-01-27 15:19:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017044000] [2024-01-27 15:19:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:51,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017044000] [2024-01-27 15:19:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017044000] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162702963] [2024-01-27 15:19:51,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:19:51,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:51,174 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 15:19:51,200 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 15:19:51,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:19:51,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:51,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:19:51,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:51,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:51,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-27 15:19:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:51,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:51,680 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:19:51,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:19:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:51,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162702963] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:51,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:51,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-01-27 15:19:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294303360] [2024-01-27 15:19:51,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:51,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:19:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:19:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:19:51,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:51,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 486 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:51,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:51,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:51,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:52,107 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-01-27 15:19:52,107 INFO L125 PetriNetUnfolderBase]: For 1164/1164 co-relation queries the response was YES. [2024-01-27 15:19:52,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 361 events. 192/361 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1286 event pairs, 36 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1550. Up to 272 conditions per place. [2024-01-27 15:19:52,109 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 61 selfloop transitions, 25 changer transitions 2/89 dead transitions. [2024-01-27 15:19:52,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 808 flow [2024-01-27 15:19:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:19:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:19:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 95 transitions. [2024-01-27 15:19:52,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3177257525083612 [2024-01-27 15:19:52,111 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 486 flow. Second operand 13 states and 95 transitions. [2024-01-27 15:19:52,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 808 flow [2024-01-27 15:19:52,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 755 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-27 15:19:52,120 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 575 flow [2024-01-27 15:19:52,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=575, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2024-01-27 15:19:52,121 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 62 predicate places. [2024-01-27 15:19:52,121 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 575 flow [2024-01-27 15:19:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:52,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:52,123 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:52,148 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 15:19:52,335 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,SelfDestructingSolverStorable12 [2024-01-27 15:19:52,335 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 15:19:52,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 258403303, now seen corresponding path program 5 times [2024-01-27 15:19:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:52,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275708543] [2024-01-27 15:19:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:52,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275708543] [2024-01-27 15:19:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275708543] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647764299] [2024-01-27 15:19:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:19:52,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:52,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:52,804 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 15:19:52,832 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 15:19:53,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:19:53,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:53,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:19:53,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:53,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:53,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:19:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:53,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:53,384 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:19:53,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:19:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:53,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647764299] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:53,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:53,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-01-27 15:19:53,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933013220] [2024-01-27 15:19:53,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:19:53,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:19:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:19:53,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:53,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 575 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:53,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:53,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:53,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:53,936 INFO L124 PetriNetUnfolderBase]: 198/376 cut-off events. [2024-01-27 15:19:53,936 INFO L125 PetriNetUnfolderBase]: For 1586/1586 co-relation queries the response was YES. [2024-01-27 15:19:53,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 376 events. 198/376 cut-off events. For 1586/1586 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1388 event pairs, 38 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1708. Up to 272 conditions per place. [2024-01-27 15:19:53,939 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 60 selfloop transitions, 27 changer transitions 4/92 dead transitions. [2024-01-27 15:19:53,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 865 flow [2024-01-27 15:19:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:19:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:19:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 95 transitions. [2024-01-27 15:19:53,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3177257525083612 [2024-01-27 15:19:53,941 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 575 flow. Second operand 13 states and 95 transitions. [2024-01-27 15:19:53,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 865 flow [2024-01-27 15:19:53,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 787 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-01-27 15:19:53,946 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 606 flow [2024-01-27 15:19:53,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=606, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2024-01-27 15:19:53,947 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 68 predicate places. [2024-01-27 15:19:53,947 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 606 flow [2024-01-27 15:19:53,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:53,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:53,947 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:53,970 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 15:19:54,159 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,SelfDestructingSolverStorable13 [2024-01-27 15:19:54,160 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 15:19:54,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1063950295, now seen corresponding path program 6 times [2024-01-27 15:19:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:54,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116557317] [2024-01-27 15:19:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:54,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:54,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116557317] [2024-01-27 15:19:54,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116557317] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:54,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092831123] [2024-01-27 15:19:54,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:19:54,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:54,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:54,693 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 15:19:54,721 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 15:19:54,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:19:54,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:54,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:19:54,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:54,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:54,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:19:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:54,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:55,238 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:19:55,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-01-27 15:19:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092831123] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:55,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-01-27 15:19:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874475888] [2024-01-27 15:19:55,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:19:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:19:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:19:55,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:55,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 606 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:55,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:55,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:55,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:55,683 INFO L124 PetriNetUnfolderBase]: 264/497 cut-off events. [2024-01-27 15:19:55,684 INFO L125 PetriNetUnfolderBase]: For 2789/2789 co-relation queries the response was YES. [2024-01-27 15:19:55,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 497 events. 264/497 cut-off events. For 2789/2789 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2042 event pairs, 40 based on Foata normal form. 1/498 useless extension candidates. Maximal degree in co-relation 2453. Up to 197 conditions per place. [2024-01-27 15:19:55,687 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 72 selfloop transitions, 33 changer transitions 2/108 dead transitions. [2024-01-27 15:19:55,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 108 transitions, 1102 flow [2024-01-27 15:19:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:19:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:19:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-01-27 15:19:55,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277591973244147 [2024-01-27 15:19:55,688 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 606 flow. Second operand 13 states and 98 transitions. [2024-01-27 15:19:55,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 108 transitions, 1102 flow [2024-01-27 15:19:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 1013 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-01-27 15:19:55,714 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 740 flow [2024-01-27 15:19:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=740, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2024-01-27 15:19:55,716 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2024-01-27 15:19:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 740 flow [2024-01-27 15:19:55,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:55,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:55,716 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:55,738 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 15:19:55,928 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,SelfDestructingSolverStorable14 [2024-01-27 15:19:55,928 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 15:19:55,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -339272003, now seen corresponding path program 7 times [2024-01-27 15:19:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:55,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778622072] [2024-01-27 15:19:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:55,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:19:56,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778622072] [2024-01-27 15:19:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778622072] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922619765] [2024-01-27 15:19:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:19:56,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:56,977 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 15:19:57,003 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 15:19:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:57,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:19:57,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:57,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:57,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-27 15:19:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:57,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:57,560 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:19:57,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:19:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922619765] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:57,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:57,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 28 [2024-01-27 15:19:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078340687] [2024-01-27 15:19:57,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:57,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:19:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:19:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:19:57,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:57,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 740 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 15:19:57,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:57,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:58,240 INFO L124 PetriNetUnfolderBase]: 280/526 cut-off events. [2024-01-27 15:19:58,241 INFO L125 PetriNetUnfolderBase]: For 3464/3464 co-relation queries the response was YES. [2024-01-27 15:19:58,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2848 conditions, 526 events. 280/526 cut-off events. For 3464/3464 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2164 event pairs, 96 based on Foata normal form. 1/527 useless extension candidates. Maximal degree in co-relation 2764. Up to 417 conditions per place. [2024-01-27 15:19:58,244 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 71 selfloop transitions, 34 changer transitions 3/109 dead transitions. [2024-01-27 15:19:58,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 1136 flow [2024-01-27 15:19:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:19:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:19:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 106 transitions. [2024-01-27 15:19:58,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3072463768115942 [2024-01-27 15:19:58,247 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 740 flow. Second operand 15 states and 106 transitions. [2024-01-27 15:19:58,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 1136 flow [2024-01-27 15:19:58,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 1072 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-01-27 15:19:58,255 INFO L231 Difference]: Finished difference. Result has 106 places, 90 transitions, 886 flow [2024-01-27 15:19:58,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=886, PETRI_PLACES=106, PETRI_TRANSITIONS=90} [2024-01-27 15:19:58,256 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2024-01-27 15:19:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 90 transitions, 886 flow [2024-01-27 15:19:58,257 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 15:19:58,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:58,257 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:58,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:19:58,469 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,SelfDestructingSolverStorable15 [2024-01-27 15:19:58,469 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 15:19:58,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 618036669, now seen corresponding path program 8 times [2024-01-27 15:19:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998900084] [2024-01-27 15:19:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998900084] [2024-01-27 15:19:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998900084] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710889767] [2024-01-27 15:19:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:58,965 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 15:19:58,991 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 15:19:59,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:19:59,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:59,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:19:59,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:59,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:59,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:19:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:59,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:59,469 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:19:59,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:19:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:19:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710889767] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:59,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:59,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-01-27 15:19:59,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810230416] [2024-01-27 15:19:59,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:59,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:19:59,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:19:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:19:59,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:19:59,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 90 transitions, 886 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:59,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:59,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:19:59,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:59,951 INFO L124 PetriNetUnfolderBase]: 289/546 cut-off events. [2024-01-27 15:19:59,951 INFO L125 PetriNetUnfolderBase]: For 4255/4255 co-relation queries the response was YES. [2024-01-27 15:19:59,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3156 conditions, 546 events. 289/546 cut-off events. For 4255/4255 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2293 event pairs, 90 based on Foata normal form. 1/547 useless extension candidates. Maximal degree in co-relation 3063. Up to 435 conditions per place. [2024-01-27 15:19:59,955 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 83 selfloop transitions, 29 changer transitions 4/117 dead transitions. [2024-01-27 15:19:59,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 117 transitions, 1330 flow [2024-01-27 15:19:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:19:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:19:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 94 transitions. [2024-01-27 15:19:59,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31438127090301005 [2024-01-27 15:19:59,956 INFO L175 Difference]: Start difference. First operand has 106 places, 90 transitions, 886 flow. Second operand 13 states and 94 transitions. [2024-01-27 15:19:59,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 117 transitions, 1330 flow [2024-01-27 15:19:59,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 117 transitions, 1243 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-01-27 15:19:59,969 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 999 flow [2024-01-27 15:19:59,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=999, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2024-01-27 15:19:59,970 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 88 predicate places. [2024-01-27 15:19:59,970 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 999 flow [2024-01-27 15:19:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:59,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:59,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:59,994 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 15:20:00,182 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,SelfDestructingSolverStorable16 [2024-01-27 15:20:00,183 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 15:20:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1491777349, now seen corresponding path program 9 times [2024-01-27 15:20:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518453666] [2024-01-27 15:20:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:00,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518453666] [2024-01-27 15:20:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518453666] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934535172] [2024-01-27 15:20:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:00,633 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 15:20:00,634 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 15:20:00,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:20:00,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:00,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:20:00,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:00,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:00,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:20:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:00,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:01,102 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:20:01,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:20:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:01,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934535172] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:01,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:01,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-01-27 15:20:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489591165] [2024-01-27 15:20:01,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:20:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:20:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:20:01,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:01,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 999 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:01,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:01,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:01,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:01,654 INFO L124 PetriNetUnfolderBase]: 288/550 cut-off events. [2024-01-27 15:20:01,654 INFO L125 PetriNetUnfolderBase]: For 4537/4537 co-relation queries the response was YES. [2024-01-27 15:20:01,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 550 events. 288/550 cut-off events. For 4537/4537 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2344 event pairs, 94 based on Foata normal form. 1/551 useless extension candidates. Maximal degree in co-relation 3119. Up to 426 conditions per place. [2024-01-27 15:20:01,658 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 83 selfloop transitions, 29 changer transitions 5/118 dead transitions. [2024-01-27 15:20:01,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 118 transitions, 1335 flow [2024-01-27 15:20:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:20:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:20:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-01-27 15:20:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-27 15:20:01,659 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 999 flow. Second operand 12 states and 90 transitions. [2024-01-27 15:20:01,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 118 transitions, 1335 flow [2024-01-27 15:20:01,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 1234 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-01-27 15:20:01,670 INFO L231 Difference]: Finished difference. Result has 115 places, 99 transitions, 981 flow [2024-01-27 15:20:01,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=981, PETRI_PLACES=115, PETRI_TRANSITIONS=99} [2024-01-27 15:20:01,670 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 92 predicate places. [2024-01-27 15:20:01,670 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 99 transitions, 981 flow [2024-01-27 15:20:01,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:01,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:01,671 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:01,698 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 15:20:01,882 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,SelfDestructingSolverStorable17 [2024-01-27 15:20:01,882 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 15:20:01,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash 976013561, now seen corresponding path program 10 times [2024-01-27 15:20:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:01,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647150759] [2024-01-27 15:20:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:20:02,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:02,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647150759] [2024-01-27 15:20:02,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647150759] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:02,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160300275] [2024-01-27 15:20:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:02,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:02,915 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 15:20:02,936 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 15:20:03,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:03,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:20:03,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:03,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:03,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-27 15:20:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:03,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:03,517 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:20:03,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:20:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160300275] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:03,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:03,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 32 [2024-01-27 15:20:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517346417] [2024-01-27 15:20:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:03,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:20:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:20:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:20:03,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:03,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 99 transitions, 981 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:03,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:03,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:03,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:04,181 INFO L124 PetriNetUnfolderBase]: 288/548 cut-off events. [2024-01-27 15:20:04,181 INFO L125 PetriNetUnfolderBase]: For 4249/4249 co-relation queries the response was YES. [2024-01-27 15:20:04,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 548 events. 288/548 cut-off events. For 4249/4249 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2334 event pairs, 94 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 3061. Up to 425 conditions per place. [2024-01-27 15:20:04,185 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 80 selfloop transitions, 34 changer transitions 5/120 dead transitions. [2024-01-27 15:20:04,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 1327 flow [2024-01-27 15:20:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:20:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:20:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 109 transitions. [2024-01-27 15:20:04,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296195652173913 [2024-01-27 15:20:04,186 INFO L175 Difference]: Start difference. First operand has 115 places, 99 transitions, 981 flow. Second operand 16 states and 109 transitions. [2024-01-27 15:20:04,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 1327 flow [2024-01-27 15:20:04,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 1265 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-01-27 15:20:04,196 INFO L231 Difference]: Finished difference. Result has 122 places, 99 transitions, 1018 flow [2024-01-27 15:20:04,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1018, PETRI_PLACES=122, PETRI_TRANSITIONS=99} [2024-01-27 15:20:04,196 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 99 predicate places. [2024-01-27 15:20:04,197 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 99 transitions, 1018 flow [2024-01-27 15:20:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:04,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:04,197 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:04,208 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 15:20:04,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:04,408 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 15:20:04,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash 813297526, now seen corresponding path program 11 times [2024-01-27 15:20:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:04,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81120007] [2024-01-27 15:20:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:04,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:04,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81120007] [2024-01-27 15:20:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81120007] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721929987] [2024-01-27 15:20:04,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:04,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:04,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:04,831 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 15:20:04,857 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 15:20:04,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:04,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:04,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:20:04,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:05,100 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:20:05,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:20:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:05,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:05,201 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:20:05,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:20:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721929987] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:05,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-01-27 15:20:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752387404] [2024-01-27 15:20:05,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:05,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:20:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:20:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:20:05,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 99 transitions, 1018 flow. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:05,556 INFO L124 PetriNetUnfolderBase]: 299/566 cut-off events. [2024-01-27 15:20:05,556 INFO L125 PetriNetUnfolderBase]: For 4876/4876 co-relation queries the response was YES. [2024-01-27 15:20:05,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3393 conditions, 566 events. 299/566 cut-off events. For 4876/4876 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2438 event pairs, 58 based on Foata normal form. 6/572 useless extension candidates. Maximal degree in co-relation 3297. Up to 292 conditions per place. [2024-01-27 15:20:05,560 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 93 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-01-27 15:20:05,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 131 transitions, 1561 flow [2024-01-27 15:20:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:20:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:20:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-01-27 15:20:05,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826086956521739 [2024-01-27 15:20:05,561 INFO L175 Difference]: Start difference. First operand has 122 places, 99 transitions, 1018 flow. Second operand 10 states and 88 transitions. [2024-01-27 15:20:05,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 131 transitions, 1561 flow [2024-01-27 15:20:05,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 131 transitions, 1472 flow, removed 11 selfloop flow, removed 15 redundant places. [2024-01-27 15:20:05,573 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 1057 flow [2024-01-27 15:20:05,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1057, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2024-01-27 15:20:05,573 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 95 predicate places. [2024-01-27 15:20:05,574 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 1057 flow [2024-01-27 15:20:05,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:05,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:05,574 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:05,602 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 15:20:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:05,803 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 15:20:05,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash -488628315, now seen corresponding path program 12 times [2024-01-27 15:20:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:05,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366388130] [2024-01-27 15:20:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:06,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366388130] [2024-01-27 15:20:06,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366388130] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:06,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049668500] [2024-01-27 15:20:06,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:06,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:06,310 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 15:20:06,340 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 15:20:06,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:20:06,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:06,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:20:06,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:06,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:06,801 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:06,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049668500] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:06,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-27 15:20:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325508927] [2024-01-27 15:20:06,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:20:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:20:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:20:06,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:06,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 1057 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:06,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:06,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:06,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:07,171 INFO L124 PetriNetUnfolderBase]: 304/584 cut-off events. [2024-01-27 15:20:07,172 INFO L125 PetriNetUnfolderBase]: For 5463/5463 co-relation queries the response was YES. [2024-01-27 15:20:07,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3531 conditions, 584 events. 304/584 cut-off events. For 5463/5463 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2638 event pairs, 55 based on Foata normal form. 4/588 useless extension candidates. Maximal degree in co-relation 3440. Up to 202 conditions per place. [2024-01-27 15:20:07,176 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 84 selfloop transitions, 39 changer transitions 16/140 dead transitions. [2024-01-27 15:20:07,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 140 transitions, 1651 flow [2024-01-27 15:20:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2024-01-27 15:20:07,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2024-01-27 15:20:07,178 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 1057 flow. Second operand 9 states and 81 transitions. [2024-01-27 15:20:07,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 140 transitions, 1651 flow [2024-01-27 15:20:07,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 140 transitions, 1533 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-01-27 15:20:07,193 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 1079 flow [2024-01-27 15:20:07,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1079, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-01-27 15:20:07,193 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 99 predicate places. [2024-01-27 15:20:07,194 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 1079 flow [2024-01-27 15:20:07,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:07,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:07,194 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:07,207 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 15:20:07,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:07,406 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 15:20:07,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1607179207, now seen corresponding path program 13 times [2024-01-27 15:20:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056857836] [2024-01-27 15:20:07,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:07,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056857836] [2024-01-27 15:20:07,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056857836] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819849578] [2024-01-27 15:20:07,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:07,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:07,959 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 15:20:07,961 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 15:20:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:08,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:20:08,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:08,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:08,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-27 15:20:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:08,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:08,331 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:08,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:08,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819849578] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:08,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:08,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165721976] [2024-01-27 15:20:08,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:08,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:08,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:08,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 1079 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:08,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:08,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:08,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:08,875 INFO L124 PetriNetUnfolderBase]: 307/589 cut-off events. [2024-01-27 15:20:08,876 INFO L125 PetriNetUnfolderBase]: For 5410/5410 co-relation queries the response was YES. [2024-01-27 15:20:08,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3662 conditions, 589 events. 307/589 cut-off events. For 5410/5410 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2593 event pairs, 76 based on Foata normal form. 4/593 useless extension candidates. Maximal degree in co-relation 3570. Up to 249 conditions per place. [2024-01-27 15:20:08,880 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 95 selfloop transitions, 37 changer transitions 1/134 dead transitions. [2024-01-27 15:20:08,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 134 transitions, 1618 flow [2024-01-27 15:20:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-01-27 15:20:08,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2024-01-27 15:20:08,881 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 1079 flow. Second operand 9 states and 88 transitions. [2024-01-27 15:20:08,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 134 transitions, 1618 flow [2024-01-27 15:20:08,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 134 transitions, 1527 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-01-27 15:20:08,895 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 1094 flow [2024-01-27 15:20:08,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1094, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2024-01-27 15:20:08,896 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 100 predicate places. [2024-01-27 15:20:08,896 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 1094 flow [2024-01-27 15:20:08,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:08,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:08,896 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:08,907 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 15:20:09,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:09,100 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 15:20:09,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:09,100 INFO L85 PathProgramCache]: Analyzing trace with hash 883146762, now seen corresponding path program 14 times [2024-01-27 15:20:09,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:09,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850968346] [2024-01-27 15:20:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:09,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850968346] [2024-01-27 15:20:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850968346] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862920994] [2024-01-27 15:20:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:09,522 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 15:20:09,522 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 15:20:09,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:09,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:09,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:09,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:09,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:09,930 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:20:09,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:20:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862920994] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:09,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:09,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-27 15:20:09,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118868677] [2024-01-27 15:20:09,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:09,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:09,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:09,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:09,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 1094 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:09,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:09,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:09,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:10,241 INFO L124 PetriNetUnfolderBase]: 339/645 cut-off events. [2024-01-27 15:20:10,241 INFO L125 PetriNetUnfolderBase]: For 5925/5925 co-relation queries the response was YES. [2024-01-27 15:20:10,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3977 conditions, 645 events. 339/645 cut-off events. For 5925/5925 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2934 event pairs, 54 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 3886. Up to 302 conditions per place. [2024-01-27 15:20:10,245 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 100 selfloop transitions, 44 changer transitions 0/145 dead transitions. [2024-01-27 15:20:10,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 145 transitions, 1730 flow [2024-01-27 15:20:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:20:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:20:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 106 transitions. [2024-01-27 15:20:10,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38405797101449274 [2024-01-27 15:20:10,247 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 1094 flow. Second operand 12 states and 106 transitions. [2024-01-27 15:20:10,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 145 transitions, 1730 flow [2024-01-27 15:20:10,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 145 transitions, 1646 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:10,259 INFO L231 Difference]: Finished difference. Result has 130 places, 108 transitions, 1194 flow [2024-01-27 15:20:10,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1194, PETRI_PLACES=130, PETRI_TRANSITIONS=108} [2024-01-27 15:20:10,260 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 107 predicate places. [2024-01-27 15:20:10,260 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 108 transitions, 1194 flow [2024-01-27 15:20:10,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:10,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:10,260 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:10,282 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 15:20:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:10,472 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 15:20:10,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1683249657, now seen corresponding path program 15 times [2024-01-27 15:20:10,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:10,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918445589] [2024-01-27 15:20:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:10,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:10,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:10,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918445589] [2024-01-27 15:20:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918445589] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:10,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219647089] [2024-01-27 15:20:10,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:10,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:10,913 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 15:20:10,956 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 15:20:11,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:20:11,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:11,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:20:11,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:11,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:11,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:20:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:11,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:11,453 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:11,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219647089] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:11,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:11,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-01-27 15:20:11,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668532515] [2024-01-27 15:20:11,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:11,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:20:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:20:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:20:11,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:11,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 108 transitions, 1194 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:11,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:11,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:11,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:12,010 INFO L124 PetriNetUnfolderBase]: 356/679 cut-off events. [2024-01-27 15:20:12,010 INFO L125 PetriNetUnfolderBase]: For 7407/7407 co-relation queries the response was YES. [2024-01-27 15:20:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4383 conditions, 679 events. 356/679 cut-off events. For 7407/7407 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3168 event pairs, 53 based on Foata normal form. 7/686 useless extension candidates. Maximal degree in co-relation 4288. Up to 263 conditions per place. [2024-01-27 15:20:12,015 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 103 selfloop transitions, 42 changer transitions 12/158 dead transitions. [2024-01-27 15:20:12,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 158 transitions, 1918 flow [2024-01-27 15:20:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:20:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:20:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-01-27 15:20:12,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384057971014493 [2024-01-27 15:20:12,016 INFO L175 Difference]: Start difference. First operand has 130 places, 108 transitions, 1194 flow. Second operand 12 states and 121 transitions. [2024-01-27 15:20:12,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 158 transitions, 1918 flow [2024-01-27 15:20:12,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 158 transitions, 1837 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:12,032 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1287 flow [2024-01-27 15:20:12,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1287, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2024-01-27 15:20:12,033 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2024-01-27 15:20:12,033 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1287 flow [2024-01-27 15:20:12,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:12,034 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:12,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:12,245 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 15:20:12,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash 501209035, now seen corresponding path program 16 times [2024-01-27 15:20:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:12,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74807400] [2024-01-27 15:20:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:12,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:12,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74807400] [2024-01-27 15:20:12,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74807400] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:12,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80313232] [2024-01-27 15:20:12,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:12,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:12,652 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 15:20:12,680 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 15:20:12,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:12,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:12,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:12,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:12,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:13,043 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:13,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80313232] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:13,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:13,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:13,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709664418] [2024-01-27 15:20:13,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:13,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:13,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:13,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1287 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:13,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:13,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:13,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:13,443 INFO L124 PetriNetUnfolderBase]: 335/636 cut-off events. [2024-01-27 15:20:13,444 INFO L125 PetriNetUnfolderBase]: For 7708/7708 co-relation queries the response was YES. [2024-01-27 15:20:13,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 636 events. 335/636 cut-off events. For 7708/7708 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2873 event pairs, 93 based on Foata normal form. 4/640 useless extension candidates. Maximal degree in co-relation 4137. Up to 289 conditions per place. [2024-01-27 15:20:13,449 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 90 selfloop transitions, 36 changer transitions 8/135 dead transitions. [2024-01-27 15:20:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 135 transitions, 1737 flow [2024-01-27 15:20:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-01-27 15:20:13,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719806763285024 [2024-01-27 15:20:13,450 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1287 flow. Second operand 9 states and 77 transitions. [2024-01-27 15:20:13,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 135 transitions, 1737 flow [2024-01-27 15:20:13,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 135 transitions, 1626 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:13,468 INFO L231 Difference]: Finished difference. Result has 139 places, 112 transitions, 1259 flow [2024-01-27 15:20:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1259, PETRI_PLACES=139, PETRI_TRANSITIONS=112} [2024-01-27 15:20:13,468 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 116 predicate places. [2024-01-27 15:20:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 112 transitions, 1259 flow [2024-01-27 15:20:13,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:13,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:13,469 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:13,494 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 15:20:13,681 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,SelfDestructingSolverStorable24 [2024-01-27 15:20:13,681 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 15:20:13,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1552805109, now seen corresponding path program 17 times [2024-01-27 15:20:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384225627] [2024-01-27 15:20:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:20:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:14,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384225627] [2024-01-27 15:20:14,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384225627] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:14,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578557500] [2024-01-27 15:20:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:14,284 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 15:20:14,303 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 15:20:14,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:14,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:14,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:20:14,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:14,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:14,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-27 15:20:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:14,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:14,712 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:14,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:14,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578557500] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:14,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:14,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 26 [2024-01-27 15:20:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402693752] [2024-01-27 15:20:14,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:20:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:14,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:20:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:20:14,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 112 transitions, 1259 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:15,356 INFO L124 PetriNetUnfolderBase]: 359/682 cut-off events. [2024-01-27 15:20:15,357 INFO L125 PetriNetUnfolderBase]: For 8207/8207 co-relation queries the response was YES. [2024-01-27 15:20:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 682 events. 359/682 cut-off events. For 8207/8207 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3131 event pairs, 134 based on Foata normal form. 4/686 useless extension candidates. Maximal degree in co-relation 4445. Up to 520 conditions per place. [2024-01-27 15:20:15,366 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 110 selfloop transitions, 38 changer transitions 2/151 dead transitions. [2024-01-27 15:20:15,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 151 transitions, 1963 flow [2024-01-27 15:20:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:20:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:20:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 129 transitions. [2024-01-27 15:20:15,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.329923273657289 [2024-01-27 15:20:15,367 INFO L175 Difference]: Start difference. First operand has 139 places, 112 transitions, 1259 flow. Second operand 17 states and 129 transitions. [2024-01-27 15:20:15,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 151 transitions, 1963 flow [2024-01-27 15:20:15,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 151 transitions, 1871 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:15,384 INFO L231 Difference]: Finished difference. Result has 149 places, 117 transitions, 1370 flow [2024-01-27 15:20:15,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1370, PETRI_PLACES=149, PETRI_TRANSITIONS=117} [2024-01-27 15:20:15,385 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2024-01-27 15:20:15,385 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 117 transitions, 1370 flow [2024-01-27 15:20:15,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:15,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:15,385 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:15,398 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 15:20:15,600 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,SelfDestructingSolverStorable25 [2024-01-27 15:20:15,600 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 15:20:15,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -54872095, now seen corresponding path program 18 times [2024-01-27 15:20:15,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:15,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894284417] [2024-01-27 15:20:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894284417] [2024-01-27 15:20:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894284417] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992876394] [2024-01-27 15:20:16,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:16,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:16,022 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 15:20:16,045 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 15:20:16,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:20:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:16,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:16,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:16,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:16,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:16,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:16,470 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:16,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992876394] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:16,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:16,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-27 15:20:16,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766415559] [2024-01-27 15:20:16,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:16,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:16,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:16,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 117 transitions, 1370 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:16,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:16,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:16,895 INFO L124 PetriNetUnfolderBase]: 371/709 cut-off events. [2024-01-27 15:20:16,895 INFO L125 PetriNetUnfolderBase]: For 9726/9726 co-relation queries the response was YES. [2024-01-27 15:20:16,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4839 conditions, 709 events. 371/709 cut-off events. For 9726/9726 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3361 event pairs, 144 based on Foata normal form. 4/713 useless extension candidates. Maximal degree in co-relation 4731. Up to 558 conditions per place. [2024-01-27 15:20:16,903 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 108 selfloop transitions, 28 changer transitions 1/138 dead transitions. [2024-01-27 15:20:16,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 138 transitions, 1809 flow [2024-01-27 15:20:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2024-01-27 15:20:16,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38164251207729466 [2024-01-27 15:20:16,909 INFO L175 Difference]: Start difference. First operand has 149 places, 117 transitions, 1370 flow. Second operand 9 states and 79 transitions. [2024-01-27 15:20:16,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 138 transitions, 1809 flow [2024-01-27 15:20:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 138 transitions, 1703 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-01-27 15:20:16,927 INFO L231 Difference]: Finished difference. Result has 146 places, 118 transitions, 1351 flow [2024-01-27 15:20:16,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1351, PETRI_PLACES=146, PETRI_TRANSITIONS=118} [2024-01-27 15:20:16,928 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 123 predicate places. [2024-01-27 15:20:16,928 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 118 transitions, 1351 flow [2024-01-27 15:20:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:16,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:16,928 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:16,939 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 15:20:17,139 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,SelfDestructingSolverStorable26 [2024-01-27 15:20:17,140 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 15:20:17,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1831210210, now seen corresponding path program 19 times [2024-01-27 15:20:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:17,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65077675] [2024-01-27 15:20:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:17,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:17,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:17,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65077675] [2024-01-27 15:20:17,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65077675] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:17,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670978158] [2024-01-27 15:20:17,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:17,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:17,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:17,525 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 15:20:17,550 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 15:20:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:17,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:17,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:17,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:17,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:17,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:17,900 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:17,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:17,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670978158] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:17,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:17,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-27 15:20:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783525774] [2024-01-27 15:20:17,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:17,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:17,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:17,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 118 transitions, 1351 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:17,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:18,452 INFO L124 PetriNetUnfolderBase]: 397/765 cut-off events. [2024-01-27 15:20:18,453 INFO L125 PetriNetUnfolderBase]: For 11128/11128 co-relation queries the response was YES. [2024-01-27 15:20:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5246 conditions, 765 events. 397/765 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3742 event pairs, 146 based on Foata normal form. 6/771 useless extension candidates. Maximal degree in co-relation 5144. Up to 582 conditions per place. [2024-01-27 15:20:18,458 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 128 selfloop transitions, 34 changer transitions 4/167 dead transitions. [2024-01-27 15:20:18,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 167 transitions, 2036 flow [2024-01-27 15:20:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:20:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:20:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 124 transitions. [2024-01-27 15:20:18,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38509316770186336 [2024-01-27 15:20:18,460 INFO L175 Difference]: Start difference. First operand has 146 places, 118 transitions, 1351 flow. Second operand 14 states and 124 transitions. [2024-01-27 15:20:18,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 167 transitions, 2036 flow [2024-01-27 15:20:18,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 167 transitions, 1972 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:18,478 INFO L231 Difference]: Finished difference. Result has 155 places, 123 transitions, 1476 flow [2024-01-27 15:20:18,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1476, PETRI_PLACES=155, PETRI_TRANSITIONS=123} [2024-01-27 15:20:18,483 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 132 predicate places. [2024-01-27 15:20:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 123 transitions, 1476 flow [2024-01-27 15:20:18,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:18,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:18,484 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:18,506 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 15:20:18,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:18,695 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 15:20:18,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash 121510440, now seen corresponding path program 20 times [2024-01-27 15:20:18,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:18,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929473534] [2024-01-27 15:20:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:18,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929473534] [2024-01-27 15:20:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929473534] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766111792] [2024-01-27 15:20:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:19,107 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 15:20:19,108 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 15:20:19,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:19,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:19,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:19,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:19,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:19,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:19,516 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:19,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:19,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766111792] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:19,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:19,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-27 15:20:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506969986] [2024-01-27 15:20:19,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:19,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:19,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:19,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:19,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 123 transitions, 1476 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:19,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:19,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:19,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:19,881 INFO L124 PetriNetUnfolderBase]: 407/790 cut-off events. [2024-01-27 15:20:19,881 INFO L125 PetriNetUnfolderBase]: For 13563/13563 co-relation queries the response was YES. [2024-01-27 15:20:19,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5661 conditions, 790 events. 407/790 cut-off events. For 13563/13563 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3869 event pairs, 179 based on Foata normal form. 6/796 useless extension candidates. Maximal degree in co-relation 5556. Up to 658 conditions per place. [2024-01-27 15:20:19,886 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 114 selfloop transitions, 26 changer transitions 1/142 dead transitions. [2024-01-27 15:20:19,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 142 transitions, 1914 flow [2024-01-27 15:20:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-01-27 15:20:19,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719806763285024 [2024-01-27 15:20:19,888 INFO L175 Difference]: Start difference. First operand has 155 places, 123 transitions, 1476 flow. Second operand 9 states and 77 transitions. [2024-01-27 15:20:19,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 142 transitions, 1914 flow [2024-01-27 15:20:19,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 142 transitions, 1771 flow, removed 45 selfloop flow, removed 10 redundant places. [2024-01-27 15:20:19,915 INFO L231 Difference]: Finished difference. Result has 154 places, 124 transitions, 1426 flow [2024-01-27 15:20:19,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1426, PETRI_PLACES=154, PETRI_TRANSITIONS=124} [2024-01-27 15:20:19,916 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 131 predicate places. [2024-01-27 15:20:19,916 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 124 transitions, 1426 flow [2024-01-27 15:20:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:19,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:19,917 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:19,928 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 15:20:20,118 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,SelfDestructingSolverStorable28 [2024-01-27 15:20:20,118 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 15:20:20,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 714547106, now seen corresponding path program 21 times [2024-01-27 15:20:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:20,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929135263] [2024-01-27 15:20:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:20:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929135263] [2024-01-27 15:20:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929135263] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859573604] [2024-01-27 15:20:20,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:20,742 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 15:20:20,766 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 15:20:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:20:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:20,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:20,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:21,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:21,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:21,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:21,144 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:21,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:21,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859573604] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:21,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:21,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 23 [2024-01-27 15:20:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107333626] [2024-01-27 15:20:21,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:21,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:20:21,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:20:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:20:21,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:21,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 124 transitions, 1426 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:21,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:21,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:21,661 INFO L124 PetriNetUnfolderBase]: 401/775 cut-off events. [2024-01-27 15:20:21,661 INFO L125 PetriNetUnfolderBase]: For 12026/12026 co-relation queries the response was YES. [2024-01-27 15:20:21,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5397 conditions, 775 events. 401/775 cut-off events. For 12026/12026 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3795 event pairs, 156 based on Foata normal form. 4/779 useless extension candidates. Maximal degree in co-relation 5293. Up to 606 conditions per place. [2024-01-27 15:20:21,668 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 111 selfloop transitions, 37 changer transitions 6/155 dead transitions. [2024-01-27 15:20:21,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 155 transitions, 1910 flow [2024-01-27 15:20:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:20:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:20:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 119 transitions. [2024-01-27 15:20:21,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34492753623188405 [2024-01-27 15:20:21,685 INFO L175 Difference]: Start difference. First operand has 154 places, 124 transitions, 1426 flow. Second operand 15 states and 119 transitions. [2024-01-27 15:20:21,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 155 transitions, 1910 flow [2024-01-27 15:20:21,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 155 transitions, 1840 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:21,728 INFO L231 Difference]: Finished difference. Result has 160 places, 121 transitions, 1404 flow [2024-01-27 15:20:21,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1404, PETRI_PLACES=160, PETRI_TRANSITIONS=121} [2024-01-27 15:20:21,728 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2024-01-27 15:20:21,729 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 121 transitions, 1404 flow [2024-01-27 15:20:21,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:21,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:21,729 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:21,740 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 15:20:21,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:21,932 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 15:20:21,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:21,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1824393350, now seen corresponding path program 22 times [2024-01-27 15:20:21,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:21,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587236690] [2024-01-27 15:20:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:21,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587236690] [2024-01-27 15:20:22,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587236690] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728848512] [2024-01-27 15:20:22,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:22,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:22,345 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 15:20:22,364 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 15:20:22,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:22,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:22,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:22,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:22,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:22,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:22,741 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:22,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728848512] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:22,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:22,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:22,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644246684] [2024-01-27 15:20:22,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:22,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:22,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:22,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:22,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:22,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 121 transitions, 1404 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:22,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:22,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:22,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:23,172 INFO L124 PetriNetUnfolderBase]: 390/752 cut-off events. [2024-01-27 15:20:23,172 INFO L125 PetriNetUnfolderBase]: For 11582/11582 co-relation queries the response was YES. [2024-01-27 15:20:23,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5278 conditions, 752 events. 390/752 cut-off events. For 11582/11582 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3620 event pairs, 160 based on Foata normal form. 2/754 useless extension candidates. Maximal degree in co-relation 5167. Up to 623 conditions per place. [2024-01-27 15:20:23,177 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 110 selfloop transitions, 25 changer transitions 7/143 dead transitions. [2024-01-27 15:20:23,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 143 transitions, 1819 flow [2024-01-27 15:20:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:20:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:20:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2024-01-27 15:20:23,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-01-27 15:20:23,178 INFO L175 Difference]: Start difference. First operand has 160 places, 121 transitions, 1404 flow. Second operand 10 states and 85 transitions. [2024-01-27 15:20:23,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 143 transitions, 1819 flow [2024-01-27 15:20:23,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 143 transitions, 1738 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-01-27 15:20:23,201 INFO L231 Difference]: Finished difference. Result has 154 places, 119 transitions, 1358 flow [2024-01-27 15:20:23,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1358, PETRI_PLACES=154, PETRI_TRANSITIONS=119} [2024-01-27 15:20:23,202 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 131 predicate places. [2024-01-27 15:20:23,202 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 119 transitions, 1358 flow [2024-01-27 15:20:23,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:23,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:23,202 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:23,213 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 15:20:23,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-01-27 15:20:23,412 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 15:20:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash 339056664, now seen corresponding path program 23 times [2024-01-27 15:20:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:23,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919409731] [2024-01-27 15:20:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:23,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:23,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:23,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919409731] [2024-01-27 15:20:23,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919409731] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:23,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790758246] [2024-01-27 15:20:23,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:23,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:23,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:23,823 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 15:20:23,824 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 15:20:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:24,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:20:24,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:24,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:24,292 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:24,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790758246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:24,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:24,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:20:24,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849183580] [2024-01-27 15:20:24,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:20:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:20:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:20:24,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:24,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 119 transitions, 1358 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:24,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:24,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:24,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:24,652 INFO L124 PetriNetUnfolderBase]: 386/738 cut-off events. [2024-01-27 15:20:24,653 INFO L125 PetriNetUnfolderBase]: For 11283/11283 co-relation queries the response was YES. [2024-01-27 15:20:24,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5190 conditions, 738 events. 386/738 cut-off events. For 11283/11283 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3506 event pairs, 153 based on Foata normal form. 6/744 useless extension candidates. Maximal degree in co-relation 5087. Up to 622 conditions per place. [2024-01-27 15:20:24,657 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 112 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-01-27 15:20:24,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 138 transitions, 1759 flow [2024-01-27 15:20:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-01-27 15:20:24,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2024-01-27 15:20:24,658 INFO L175 Difference]: Start difference. First operand has 154 places, 119 transitions, 1358 flow. Second operand 9 states and 75 transitions. [2024-01-27 15:20:24,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 138 transitions, 1759 flow [2024-01-27 15:20:24,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 138 transitions, 1699 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:24,681 INFO L231 Difference]: Finished difference. Result has 151 places, 119 transitions, 1356 flow [2024-01-27 15:20:24,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1356, PETRI_PLACES=151, PETRI_TRANSITIONS=119} [2024-01-27 15:20:24,682 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 128 predicate places. [2024-01-27 15:20:24,682 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 119 transitions, 1356 flow [2024-01-27 15:20:24,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:24,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:24,682 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:24,694 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 15:20:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:24,894 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 15:20:24,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 197965666, now seen corresponding path program 24 times [2024-01-27 15:20:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:24,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448778271] [2024-01-27 15:20:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:24,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448778271] [2024-01-27 15:20:25,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448778271] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677534369] [2024-01-27 15:20:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:25,267 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 15:20:25,269 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 15:20:25,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:20:25,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:25,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:25,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:25,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:25,637 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:25,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:25,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677534369] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:25,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:25,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-27 15:20:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508017042] [2024-01-27 15:20:25,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:25,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:25,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:25,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 119 transitions, 1356 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:25,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:25,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:25,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:25,931 INFO L124 PetriNetUnfolderBase]: 382/725 cut-off events. [2024-01-27 15:20:25,931 INFO L125 PetriNetUnfolderBase]: For 10981/10981 co-relation queries the response was YES. [2024-01-27 15:20:25,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5104 conditions, 725 events. 382/725 cut-off events. For 10981/10981 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3400 event pairs, 167 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 5001. Up to 641 conditions per place. [2024-01-27 15:20:25,936 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 103 selfloop transitions, 19 changer transitions 8/131 dead transitions. [2024-01-27 15:20:25,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 131 transitions, 1684 flow [2024-01-27 15:20:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-01-27 15:20:25,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285024154589372 [2024-01-27 15:20:25,963 INFO L175 Difference]: Start difference. First operand has 151 places, 119 transitions, 1356 flow. Second operand 9 states and 68 transitions. [2024-01-27 15:20:25,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 131 transitions, 1684 flow [2024-01-27 15:20:25,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 131 transitions, 1629 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:25,987 INFO L231 Difference]: Finished difference. Result has 152 places, 116 transitions, 1310 flow [2024-01-27 15:20:25,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=152, PETRI_TRANSITIONS=116} [2024-01-27 15:20:25,987 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2024-01-27 15:20:25,987 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 116 transitions, 1310 flow [2024-01-27 15:20:25,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:25,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:25,988 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:26,000 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 15:20:26,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:26,200 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 15:20:26,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash -260311415, now seen corresponding path program 25 times [2024-01-27 15:20:26,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:26,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239820151] [2024-01-27 15:20:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:26,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:26,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:26,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239820151] [2024-01-27 15:20:26,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239820151] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13641420] [2024-01-27 15:20:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:26,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:26,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:26,554 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 15:20:26,555 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 15:20:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:26,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:26,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:26,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:26,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:26,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:26,942 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:26,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13641420] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:26,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:26,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584793385] [2024-01-27 15:20:26,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:26,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:26,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 116 transitions, 1310 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:27,315 INFO L124 PetriNetUnfolderBase]: 365/688 cut-off events. [2024-01-27 15:20:27,316 INFO L125 PetriNetUnfolderBase]: For 10070/10070 co-relation queries the response was YES. [2024-01-27 15:20:27,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 688 events. 365/688 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3139 event pairs, 148 based on Foata normal form. 8/696 useless extension candidates. Maximal degree in co-relation 4705. Up to 575 conditions per place. [2024-01-27 15:20:27,320 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 108 selfloop transitions, 24 changer transitions 4/137 dead transitions. [2024-01-27 15:20:27,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 137 transitions, 1780 flow [2024-01-27 15:20:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:20:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:20:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2024-01-27 15:20:27,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-01-27 15:20:27,334 INFO L175 Difference]: Start difference. First operand has 152 places, 116 transitions, 1310 flow. Second operand 12 states and 92 transitions. [2024-01-27 15:20:27,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 137 transitions, 1780 flow [2024-01-27 15:20:27,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 137 transitions, 1730 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:27,353 INFO L231 Difference]: Finished difference. Result has 149 places, 113 transitions, 1281 flow [2024-01-27 15:20:27,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1281, PETRI_PLACES=149, PETRI_TRANSITIONS=113} [2024-01-27 15:20:27,353 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2024-01-27 15:20:27,353 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 113 transitions, 1281 flow [2024-01-27 15:20:27,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:27,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:27,354 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:27,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:27,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:27,565 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 15:20:27,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1370157659, now seen corresponding path program 26 times [2024-01-27 15:20:27,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:27,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755230906] [2024-01-27 15:20:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:27,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:20:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:28,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755230906] [2024-01-27 15:20:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755230906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:28,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489135725] [2024-01-27 15:20:28,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:28,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:28,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:28,196 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 15:20:28,208 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 15:20:28,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:28,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:28,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:20:28,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:28,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:28,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:20:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:28,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:28,669 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:28,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:28,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489135725] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:28,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:28,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 24 [2024-01-27 15:20:28,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420956271] [2024-01-27 15:20:28,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:28,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:20:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:20:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:20:28,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:28,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 113 transitions, 1281 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:28,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:28,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:28,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:29,204 INFO L124 PetriNetUnfolderBase]: 360/679 cut-off events. [2024-01-27 15:20:29,204 INFO L125 PetriNetUnfolderBase]: For 10095/10095 co-relation queries the response was YES. [2024-01-27 15:20:29,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 679 events. 360/679 cut-off events. For 10095/10095 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3120 event pairs, 139 based on Foata normal form. 4/683 useless extension candidates. Maximal degree in co-relation 4657. Up to 557 conditions per place. [2024-01-27 15:20:29,209 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 93 selfloop transitions, 36 changer transitions 4/134 dead transitions. [2024-01-27 15:20:29,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 134 transitions, 1681 flow [2024-01-27 15:20:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:20:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:20:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 108 transitions. [2024-01-27 15:20:29,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3130434782608696 [2024-01-27 15:20:29,233 INFO L175 Difference]: Start difference. First operand has 149 places, 113 transitions, 1281 flow. Second operand 15 states and 108 transitions. [2024-01-27 15:20:29,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 134 transitions, 1681 flow [2024-01-27 15:20:29,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 134 transitions, 1623 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-01-27 15:20:29,253 INFO L231 Difference]: Finished difference. Result has 149 places, 111 transitions, 1275 flow [2024-01-27 15:20:29,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1275, PETRI_PLACES=149, PETRI_TRANSITIONS=111} [2024-01-27 15:20:29,253 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2024-01-27 15:20:29,254 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 111 transitions, 1275 flow [2024-01-27 15:20:29,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:29,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:29,254 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:29,278 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 15:20:29,465 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,SelfDestructingSolverStorable34 [2024-01-27 15:20:29,466 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 15:20:29,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash -350473401, now seen corresponding path program 27 times [2024-01-27 15:20:29,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:29,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577824356] [2024-01-27 15:20:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:29,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:29,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:29,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577824356] [2024-01-27 15:20:29,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577824356] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:29,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243451567] [2024-01-27 15:20:29,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:29,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:29,802 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 15:20:29,803 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 15:20:29,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:20:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:29,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:20:29,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:30,070 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:20:30,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:20:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:30,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:30,174 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:30,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243451567] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:30,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:30,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-01-27 15:20:30,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232650943] [2024-01-27 15:20:30,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:20:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:20:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:20:30,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:30,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 111 transitions, 1275 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:30,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:30,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:30,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:30,417 INFO L124 PetriNetUnfolderBase]: 359/667 cut-off events. [2024-01-27 15:20:30,417 INFO L125 PetriNetUnfolderBase]: For 9640/9640 co-relation queries the response was YES. [2024-01-27 15:20:30,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 667 events. 359/667 cut-off events. For 9640/9640 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2965 event pairs, 142 based on Foata normal form. 4/671 useless extension candidates. Maximal degree in co-relation 4599. Up to 581 conditions per place. [2024-01-27 15:20:30,421 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 102 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-01-27 15:20:30,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 124 transitions, 1673 flow [2024-01-27 15:20:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-01-27 15:20:30,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285024154589372 [2024-01-27 15:20:30,422 INFO L175 Difference]: Start difference. First operand has 149 places, 111 transitions, 1275 flow. Second operand 9 states and 68 transitions. [2024-01-27 15:20:30,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 124 transitions, 1673 flow [2024-01-27 15:20:30,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 124 transitions, 1583 flow, removed 5 selfloop flow, removed 16 redundant places. [2024-01-27 15:20:30,440 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 1235 flow [2024-01-27 15:20:30,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1235, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2024-01-27 15:20:30,441 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 116 predicate places. [2024-01-27 15:20:30,441 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 1235 flow [2024-01-27 15:20:30,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:30,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:30,441 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:30,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:30,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-27 15:20:30,656 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 15:20:30,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2022690027, now seen corresponding path program 28 times [2024-01-27 15:20:30,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:30,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005123735] [2024-01-27 15:20:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:30,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005123735] [2024-01-27 15:20:31,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005123735] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845897068] [2024-01-27 15:20:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:31,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:31,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:31,005 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 15:20:31,036 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 15:20:31,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:31,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:31,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:31,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:31,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:31,428 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:31,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:31,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845897068] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:31,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:31,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:31,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892885313] [2024-01-27 15:20:31,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:31,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:31,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 1235 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:31,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:31,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:31,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:31,795 INFO L124 PetriNetUnfolderBase]: 349/646 cut-off events. [2024-01-27 15:20:31,795 INFO L125 PetriNetUnfolderBase]: For 9100/9100 co-relation queries the response was YES. [2024-01-27 15:20:31,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 646 events. 349/646 cut-off events. For 9100/9100 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2849 event pairs, 144 based on Foata normal form. 4/650 useless extension candidates. Maximal degree in co-relation 4423. Up to 562 conditions per place. [2024-01-27 15:20:31,800 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 94 selfloop transitions, 20 changer transitions 8/123 dead transitions. [2024-01-27 15:20:31,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 123 transitions, 1541 flow [2024-01-27 15:20:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-01-27 15:20:31,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285024154589372 [2024-01-27 15:20:31,801 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 1235 flow. Second operand 9 states and 68 transitions. [2024-01-27 15:20:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 123 transitions, 1541 flow [2024-01-27 15:20:31,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 123 transitions, 1500 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:31,829 INFO L231 Difference]: Finished difference. Result has 140 places, 108 transitions, 1204 flow [2024-01-27 15:20:31,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1204, PETRI_PLACES=140, PETRI_TRANSITIONS=108} [2024-01-27 15:20:31,830 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 117 predicate places. [2024-01-27 15:20:31,830 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 108 transitions, 1204 flow [2024-01-27 15:20:31,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:31,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:31,830 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:31,861 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 15:20:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:32,042 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 15:20:32,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash 522681429, now seen corresponding path program 29 times [2024-01-27 15:20:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659887298] [2024-01-27 15:20:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659887298] [2024-01-27 15:20:32,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659887298] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:32,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172111703] [2024-01-27 15:20:32,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:32,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:32,400 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 15:20:32,400 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 15:20:32,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:32,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:32,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:20:32,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:32,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:32,926 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:32,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:32,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172111703] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:32,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:32,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:20:32,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521335367] [2024-01-27 15:20:32,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:32,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:20:32,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:20:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:20:32,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:32,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 108 transitions, 1204 flow. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:32,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:32,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:32,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:33,384 INFO L124 PetriNetUnfolderBase]: 341/630 cut-off events. [2024-01-27 15:20:33,384 INFO L125 PetriNetUnfolderBase]: For 9240/9240 co-relation queries the response was YES. [2024-01-27 15:20:33,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 630 events. 341/630 cut-off events. For 9240/9240 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2759 event pairs, 120 based on Foata normal form. 4/634 useless extension candidates. Maximal degree in co-relation 4335. Up to 523 conditions per place. [2024-01-27 15:20:33,387 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 94 selfloop transitions, 20 changer transitions 10/125 dead transitions. [2024-01-27 15:20:33,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 125 transitions, 1548 flow [2024-01-27 15:20:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-01-27 15:20:33,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33816425120772947 [2024-01-27 15:20:33,388 INFO L175 Difference]: Start difference. First operand has 140 places, 108 transitions, 1204 flow. Second operand 9 states and 70 transitions. [2024-01-27 15:20:33,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 125 transitions, 1548 flow [2024-01-27 15:20:33,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 125 transitions, 1508 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:20:33,407 INFO L231 Difference]: Finished difference. Result has 140 places, 108 transitions, 1211 flow [2024-01-27 15:20:33,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1211, PETRI_PLACES=140, PETRI_TRANSITIONS=108} [2024-01-27 15:20:33,407 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 117 predicate places. [2024-01-27 15:20:33,407 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 108 transitions, 1211 flow [2024-01-27 15:20:33,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:33,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:33,408 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:33,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-27 15:20:33,623 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,SelfDestructingSolverStorable37 [2024-01-27 15:20:33,623 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:33,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1615537325, now seen corresponding path program 30 times [2024-01-27 15:20:33,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:33,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025860809] [2024-01-27 15:20:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:33,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:20:34,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:34,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025860809] [2024-01-27 15:20:34,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025860809] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547206834] [2024-01-27 15:20:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:34,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:34,449 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 15:20:34,473 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 15:20:34,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:20:34,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:34,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:20:34,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:34,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:34,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:20:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:34,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:34,959 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:34,959 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547206834] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:35,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 23 [2024-01-27 15:20:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619117983] [2024-01-27 15:20:35,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:20:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:20:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:20:35,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:35,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 108 transitions, 1211 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:35,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:35,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:35,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:35,461 INFO L124 PetriNetUnfolderBase]: 346/637 cut-off events. [2024-01-27 15:20:35,461 INFO L125 PetriNetUnfolderBase]: For 10170/10170 co-relation queries the response was YES. [2024-01-27 15:20:35,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4599 conditions, 637 events. 346/637 cut-off events. For 10170/10170 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2769 event pairs, 119 based on Foata normal form. 4/641 useless extension candidates. Maximal degree in co-relation 4503. Up to 510 conditions per place. [2024-01-27 15:20:35,465 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 89 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-01-27 15:20:35,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 126 transitions, 1592 flow [2024-01-27 15:20:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:20:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:20:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 100 transitions. [2024-01-27 15:20:35,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3105590062111801 [2024-01-27 15:20:35,466 INFO L175 Difference]: Start difference. First operand has 140 places, 108 transitions, 1211 flow. Second operand 14 states and 100 transitions. [2024-01-27 15:20:35,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 126 transitions, 1592 flow [2024-01-27 15:20:35,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 126 transitions, 1540 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:35,487 INFO L231 Difference]: Finished difference. Result has 145 places, 109 transitions, 1265 flow [2024-01-27 15:20:35,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1265, PETRI_PLACES=145, PETRI_TRANSITIONS=109} [2024-01-27 15:20:35,489 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 122 predicate places. [2024-01-27 15:20:35,489 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 109 transitions, 1265 flow [2024-01-27 15:20:35,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:35,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:35,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:35,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-27 15:20:35,692 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,SelfDestructingSolverStorable38 [2024-01-27 15:20:35,692 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:35,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash -460195885, now seen corresponding path program 31 times [2024-01-27 15:20:35,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:35,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698081746] [2024-01-27 15:20:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698081746] [2024-01-27 15:20:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698081746] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066993421] [2024-01-27 15:20:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:36,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:36,063 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:36,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 15:20:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:36,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:20:36,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:36,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:36,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-27 15:20:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:36,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:36,485 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:20:36,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:20:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:36,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066993421] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:36,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:36,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107107539] [2024-01-27 15:20:36,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:36,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:36,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:36,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 109 transitions, 1265 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:36,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:37,102 INFO L124 PetriNetUnfolderBase]: 380/705 cut-off events. [2024-01-27 15:20:37,103 INFO L125 PetriNetUnfolderBase]: For 12090/12090 co-relation queries the response was YES. [2024-01-27 15:20:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5272 conditions, 705 events. 380/705 cut-off events. For 12090/12090 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3152 event pairs, 35 based on Foata normal form. 4/709 useless extension candidates. Maximal degree in co-relation 5166. Up to 248 conditions per place. [2024-01-27 15:20:37,107 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 113 selfloop transitions, 49 changer transitions 3/166 dead transitions. [2024-01-27 15:20:37,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 166 transitions, 2288 flow [2024-01-27 15:20:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:20:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:20:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2024-01-27 15:20:37,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641304347826087 [2024-01-27 15:20:37,109 INFO L175 Difference]: Start difference. First operand has 145 places, 109 transitions, 1265 flow. Second operand 16 states and 134 transitions. [2024-01-27 15:20:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 166 transitions, 2288 flow [2024-01-27 15:20:37,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 166 transitions, 2197 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-27 15:20:37,136 INFO L231 Difference]: Finished difference. Result has 152 places, 115 transitions, 1434 flow [2024-01-27 15:20:37,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1434, PETRI_PLACES=152, PETRI_TRANSITIONS=115} [2024-01-27 15:20:37,136 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2024-01-27 15:20:37,136 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 115 transitions, 1434 flow [2024-01-27 15:20:37,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:37,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:37,137 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:37,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:37,348 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,SelfDestructingSolverStorable39 [2024-01-27 15:20:37,348 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:37,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash 969960062, now seen corresponding path program 32 times [2024-01-27 15:20:37,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:37,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909195766] [2024-01-27 15:20:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:37,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909195766] [2024-01-27 15:20:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909195766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593494400] [2024-01-27 15:20:37,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:37,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:37,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:37,812 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:37,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 15:20:38,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:38,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:38,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:38,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:38,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:38,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:38,300 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:38,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593494400] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:38,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:20:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200480611] [2024-01-27 15:20:38,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:38,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:38,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:38,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 115 transitions, 1434 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:38,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:38,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:38,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:38,755 INFO L124 PetriNetUnfolderBase]: 390/730 cut-off events. [2024-01-27 15:20:38,755 INFO L125 PetriNetUnfolderBase]: For 14545/14545 co-relation queries the response was YES. [2024-01-27 15:20:38,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5643 conditions, 730 events. 390/730 cut-off events. For 14545/14545 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3329 event pairs, 91 based on Foata normal form. 6/736 useless extension candidates. Maximal degree in co-relation 5542. Up to 372 conditions per place. [2024-01-27 15:20:38,760 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 101 selfloop transitions, 41 changer transitions 1/144 dead transitions. [2024-01-27 15:20:38,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 144 transitions, 1998 flow [2024-01-27 15:20:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-01-27 15:20:38,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-01-27 15:20:38,761 INFO L175 Difference]: Start difference. First operand has 152 places, 115 transitions, 1434 flow. Second operand 9 states and 84 transitions. [2024-01-27 15:20:38,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 144 transitions, 1998 flow [2024-01-27 15:20:38,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 144 transitions, 1817 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-01-27 15:20:38,789 INFO L231 Difference]: Finished difference. Result has 150 places, 116 transitions, 1372 flow [2024-01-27 15:20:38,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1372, PETRI_PLACES=150, PETRI_TRANSITIONS=116} [2024-01-27 15:20:38,790 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2024-01-27 15:20:38,790 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 116 transitions, 1372 flow [2024-01-27 15:20:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:38,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:38,790 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:38,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:39,003 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:39,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1075607409, now seen corresponding path program 33 times [2024-01-27 15:20:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:39,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164373456] [2024-01-27 15:20:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:39,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:39,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164373456] [2024-01-27 15:20:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164373456] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798154857] [2024-01-27 15:20:39,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:39,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:39,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:39,320 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:39,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 15:20:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:20:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:39,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:20:39,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:39,659 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:20:39,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:20:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:39,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:39,758 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:39,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798154857] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:39,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:39,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-01-27 15:20:39,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575840239] [2024-01-27 15:20:39,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:39,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:20:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:20:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:20:39,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:39,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 116 transitions, 1372 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:39,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:39,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:39,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:40,040 INFO L124 PetriNetUnfolderBase]: 396/740 cut-off events. [2024-01-27 15:20:40,040 INFO L125 PetriNetUnfolderBase]: For 14705/14705 co-relation queries the response was YES. [2024-01-27 15:20:40,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 740 events. 396/740 cut-off events. For 14705/14705 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3388 event pairs, 154 based on Foata normal form. 4/744 useless extension candidates. Maximal degree in co-relation 5568. Up to 625 conditions per place. [2024-01-27 15:20:40,047 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 105 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-01-27 15:20:40,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 130 transitions, 1796 flow [2024-01-27 15:20:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-01-27 15:20:40,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-01-27 15:20:40,048 INFO L175 Difference]: Start difference. First operand has 150 places, 116 transitions, 1372 flow. Second operand 9 states and 69 transitions. [2024-01-27 15:20:40,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 130 transitions, 1796 flow [2024-01-27 15:20:40,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 130 transitions, 1690 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:40,078 INFO L231 Difference]: Finished difference. Result has 152 places, 117 transitions, 1351 flow [2024-01-27 15:20:40,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1351, PETRI_PLACES=152, PETRI_TRANSITIONS=117} [2024-01-27 15:20:40,079 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2024-01-27 15:20:40,079 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 117 transitions, 1351 flow [2024-01-27 15:20:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:40,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:40,080 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:40,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:40,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:40,291 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:40,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -255085987, now seen corresponding path program 34 times [2024-01-27 15:20:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:40,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241518614] [2024-01-27 15:20:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:40,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:20:40,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:40,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241518614] [2024-01-27 15:20:40,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241518614] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:40,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378694524] [2024-01-27 15:20:40,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:40,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:40,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:40,984 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:40,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 15:20:41,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:41,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:41,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:41,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:41,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:41,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:41,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:41,420 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:41,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:41,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378694524] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:41,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:41,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2024-01-27 15:20:41,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22044217] [2024-01-27 15:20:41,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:41,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:20:41,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:41,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:20:41,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:20:41,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:41,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 117 transitions, 1351 flow. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:41,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:41,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:41,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:41,992 INFO L124 PetriNetUnfolderBase]: 392/745 cut-off events. [2024-01-27 15:20:41,992 INFO L125 PetriNetUnfolderBase]: For 13516/13516 co-relation queries the response was YES. [2024-01-27 15:20:41,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5540 conditions, 745 events. 392/745 cut-off events. For 13516/13516 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3397 event pairs, 132 based on Foata normal form. 8/753 useless extension candidates. Maximal degree in co-relation 5376. Up to 566 conditions per place. [2024-01-27 15:20:41,997 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 97 selfloop transitions, 53 changer transitions 7/158 dead transitions. [2024-01-27 15:20:41,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 158 transitions, 2089 flow [2024-01-27 15:20:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:20:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:20:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 158 transitions. [2024-01-27 15:20:41,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2747826086956522 [2024-01-27 15:20:41,998 INFO L175 Difference]: Start difference. First operand has 152 places, 117 transitions, 1351 flow. Second operand 25 states and 158 transitions. [2024-01-27 15:20:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 158 transitions, 2089 flow [2024-01-27 15:20:42,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 158 transitions, 2000 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:42,031 INFO L231 Difference]: Finished difference. Result has 171 places, 130 transitions, 1526 flow [2024-01-27 15:20:42,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1526, PETRI_PLACES=171, PETRI_TRANSITIONS=130} [2024-01-27 15:20:42,032 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 148 predicate places. [2024-01-27 15:20:42,032 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 130 transitions, 1526 flow [2024-01-27 15:20:42,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:42,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:42,032 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:42,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:42,240 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,SelfDestructingSolverStorable42 [2024-01-27 15:20:42,240 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:42,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash 500120592, now seen corresponding path program 35 times [2024-01-27 15:20:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762534559] [2024-01-27 15:20:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:42,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762534559] [2024-01-27 15:20:42,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762534559] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667704190] [2024-01-27 15:20:42,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:42,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:42,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:42,629 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:42,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-27 15:20:42,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:42,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:42,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:20:42,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:42,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:42,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:43,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:43,130 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:43,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667704190] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:43,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:43,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-01-27 15:20:43,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906604921] [2024-01-27 15:20:43,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:43,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:20:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:20:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:20:43,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:43,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 130 transitions, 1526 flow. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:43,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:43,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:43,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:43,476 INFO L124 PetriNetUnfolderBase]: 392/740 cut-off events. [2024-01-27 15:20:43,476 INFO L125 PetriNetUnfolderBase]: For 13818/13818 co-relation queries the response was YES. [2024-01-27 15:20:43,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 740 events. 392/740 cut-off events. For 13818/13818 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3349 event pairs, 143 based on Foata normal form. 6/746 useless extension candidates. Maximal degree in co-relation 5406. Up to 599 conditions per place. [2024-01-27 15:20:43,481 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 115 selfloop transitions, 30 changer transitions 0/146 dead transitions. [2024-01-27 15:20:43,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 146 transitions, 1920 flow [2024-01-27 15:20:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-01-27 15:20:43,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526570048309179 [2024-01-27 15:20:43,482 INFO L175 Difference]: Start difference. First operand has 171 places, 130 transitions, 1526 flow. Second operand 9 states and 73 transitions. [2024-01-27 15:20:43,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 146 transitions, 1920 flow [2024-01-27 15:20:43,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 146 transitions, 1700 flow, removed 56 selfloop flow, removed 19 redundant places. [2024-01-27 15:20:43,510 INFO L231 Difference]: Finished difference. Result has 160 places, 131 transitions, 1409 flow [2024-01-27 15:20:43,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1409, PETRI_PLACES=160, PETRI_TRANSITIONS=131} [2024-01-27 15:20:43,511 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2024-01-27 15:20:43,511 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 131 transitions, 1409 flow [2024-01-27 15:20:43,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:43,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:43,512 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:43,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:43,725 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,SelfDestructingSolverStorable43 [2024-01-27 15:20:43,725 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:43,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1542163790, now seen corresponding path program 36 times [2024-01-27 15:20:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:43,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130499908] [2024-01-27 15:20:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130499908] [2024-01-27 15:20:44,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130499908] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886728667] [2024-01-27 15:20:44,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:44,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:44,144 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:44,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-27 15:20:44,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:20:44,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:44,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:44,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:44,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:44,577 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:44,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886728667] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:44,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:44,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:20:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859266402] [2024-01-27 15:20:44,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:44,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:44,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:44,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 131 transitions, 1409 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:44,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:44,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:44,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:44,992 INFO L124 PetriNetUnfolderBase]: 393/750 cut-off events. [2024-01-27 15:20:44,992 INFO L125 PetriNetUnfolderBase]: For 13386/13386 co-relation queries the response was YES. [2024-01-27 15:20:44,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 750 events. 393/750 cut-off events. For 13386/13386 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3473 event pairs, 78 based on Foata normal form. 2/752 useless extension candidates. Maximal degree in co-relation 5356. Up to 374 conditions per place. [2024-01-27 15:20:44,996 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 103 selfloop transitions, 47 changer transitions 9/160 dead transitions. [2024-01-27 15:20:44,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 160 transitions, 1935 flow [2024-01-27 15:20:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-01-27 15:20:44,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719806763285024 [2024-01-27 15:20:44,997 INFO L175 Difference]: Start difference. First operand has 160 places, 131 transitions, 1409 flow. Second operand 9 states and 77 transitions. [2024-01-27 15:20:44,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 160 transitions, 1935 flow [2024-01-27 15:20:45,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 1848 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-01-27 15:20:45,021 INFO L231 Difference]: Finished difference. Result has 164 places, 132 transitions, 1501 flow [2024-01-27 15:20:45,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1501, PETRI_PLACES=164, PETRI_TRANSITIONS=132} [2024-01-27 15:20:45,021 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 141 predicate places. [2024-01-27 15:20:45,021 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 132 transitions, 1501 flow [2024-01-27 15:20:45,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:45,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:45,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:45,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-27 15:20:45,233 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:45,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 707839252, now seen corresponding path program 37 times [2024-01-27 15:20:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250151280] [2024-01-27 15:20:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:45,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:45,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250151280] [2024-01-27 15:20:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250151280] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070988811] [2024-01-27 15:20:45,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:45,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:45,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:45,584 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:45,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-27 15:20:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:45,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:45,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:45,876 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:20:45,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:20:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:45,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:46,023 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:46,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:46,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070988811] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:46,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:46,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-27 15:20:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396150850] [2024-01-27 15:20:46,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:46,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:46,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 132 transitions, 1501 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:46,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:46,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:46,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:46,371 INFO L124 PetriNetUnfolderBase]: 398/752 cut-off events. [2024-01-27 15:20:46,371 INFO L125 PetriNetUnfolderBase]: For 14867/14867 co-relation queries the response was YES. [2024-01-27 15:20:46,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5739 conditions, 752 events. 398/752 cut-off events. For 14867/14867 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3422 event pairs, 150 based on Foata normal form. 6/758 useless extension candidates. Maximal degree in co-relation 5654. Up to 636 conditions per place. [2024-01-27 15:20:46,375 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 125 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-01-27 15:20:46,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 150 transitions, 1920 flow [2024-01-27 15:20:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-01-27 15:20:46,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-27 15:20:46,376 INFO L175 Difference]: Start difference. First operand has 164 places, 132 transitions, 1501 flow. Second operand 9 states and 72 transitions. [2024-01-27 15:20:46,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 150 transitions, 1920 flow [2024-01-27 15:20:46,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 150 transitions, 1826 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-01-27 15:20:46,403 INFO L231 Difference]: Finished difference. Result has 165 places, 133 transitions, 1497 flow [2024-01-27 15:20:46,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1497, PETRI_PLACES=165, PETRI_TRANSITIONS=133} [2024-01-27 15:20:46,404 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 142 predicate places. [2024-01-27 15:20:46,404 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 133 transitions, 1497 flow [2024-01-27 15:20:46,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:46,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:46,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:46,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-27 15:20:46,615 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:46,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 548008670, now seen corresponding path program 38 times [2024-01-27 15:20:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086579441] [2024-01-27 15:20:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086579441] [2024-01-27 15:20:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086579441] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872037990] [2024-01-27 15:20:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:46,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:46,970 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:46,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-27 15:20:47,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:47,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:47,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:47,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:47,410 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:47,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872037990] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:47,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-27 15:20:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019048730] [2024-01-27 15:20:47,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:47,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:47,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 133 transitions, 1497 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:47,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:47,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:47,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:47,730 INFO L124 PetriNetUnfolderBase]: 396/750 cut-off events. [2024-01-27 15:20:47,731 INFO L125 PetriNetUnfolderBase]: For 10898/10898 co-relation queries the response was YES. [2024-01-27 15:20:47,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5326 conditions, 750 events. 396/750 cut-off events. For 10898/10898 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3426 event pairs, 149 based on Foata normal form. 2/752 useless extension candidates. Maximal degree in co-relation 5242. Up to 639 conditions per place. [2024-01-27 15:20:47,735 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 112 selfloop transitions, 24 changer transitions 4/141 dead transitions. [2024-01-27 15:20:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 141 transitions, 1801 flow [2024-01-27 15:20:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 64 transitions. [2024-01-27 15:20:47,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30917874396135264 [2024-01-27 15:20:47,736 INFO L175 Difference]: Start difference. First operand has 165 places, 133 transitions, 1497 flow. Second operand 9 states and 64 transitions. [2024-01-27 15:20:47,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 141 transitions, 1801 flow [2024-01-27 15:20:47,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 141 transitions, 1727 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:47,759 INFO L231 Difference]: Finished difference. Result has 166 places, 130 transitions, 1439 flow [2024-01-27 15:20:47,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1439, PETRI_PLACES=166, PETRI_TRANSITIONS=130} [2024-01-27 15:20:47,759 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 143 predicate places. [2024-01-27 15:20:47,760 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 130 transitions, 1439 flow [2024-01-27 15:20:47,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:47,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:47,760 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:47,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:47,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:47,971 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:47,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1745966262, now seen corresponding path program 39 times [2024-01-27 15:20:47,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:47,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466579903] [2024-01-27 15:20:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466579903] [2024-01-27 15:20:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466579903] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284936806] [2024-01-27 15:20:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:48,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:48,338 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:48,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-27 15:20:48,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:20:48,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:48,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:48,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:48,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:48,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:48,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:48,784 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:48,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:48,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284936806] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:48,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:48,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-27 15:20:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109898877] [2024-01-27 15:20:48,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:48,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:20:48,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:20:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:20:48,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:48,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 130 transitions, 1439 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:48,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:48,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:48,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:49,276 INFO L124 PetriNetUnfolderBase]: 412/783 cut-off events. [2024-01-27 15:20:49,276 INFO L125 PetriNetUnfolderBase]: For 11784/11784 co-relation queries the response was YES. [2024-01-27 15:20:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5465 conditions, 783 events. 412/783 cut-off events. For 11784/11784 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3619 event pairs, 143 based on Foata normal form. 6/789 useless extension candidates. Maximal degree in co-relation 5381. Up to 625 conditions per place. [2024-01-27 15:20:49,281 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 132 selfloop transitions, 32 changer transitions 0/165 dead transitions. [2024-01-27 15:20:49,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 165 transitions, 1966 flow [2024-01-27 15:20:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:20:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:20:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 106 transitions. [2024-01-27 15:20:49,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35451505016722407 [2024-01-27 15:20:49,282 INFO L175 Difference]: Start difference. First operand has 166 places, 130 transitions, 1439 flow. Second operand 13 states and 106 transitions. [2024-01-27 15:20:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 165 transitions, 1966 flow [2024-01-27 15:20:49,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 165 transitions, 1918 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:20:49,304 INFO L231 Difference]: Finished difference. Result has 170 places, 133 transitions, 1520 flow [2024-01-27 15:20:49,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1520, PETRI_PLACES=170, PETRI_TRANSITIONS=133} [2024-01-27 15:20:49,305 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 147 predicate places. [2024-01-27 15:20:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 133 transitions, 1520 flow [2024-01-27 15:20:49,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:49,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:49,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:49,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-01-27 15:20:49,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-27 15:20:49,517 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:49,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2091963794, now seen corresponding path program 40 times [2024-01-27 15:20:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:49,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480355256] [2024-01-27 15:20:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:49,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480355256] [2024-01-27 15:20:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480355256] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:49,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935144194] [2024-01-27 15:20:49,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:49,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:49,893 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:49,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-27 15:20:50,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:50,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:50,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:50,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:50,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:50,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:50,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:50,337 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:50,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:50,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935144194] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:50,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:50,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524973779] [2024-01-27 15:20:50,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:50,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:50,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:50,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 133 transitions, 1520 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:50,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:50,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:50,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:50,753 INFO L124 PetriNetUnfolderBase]: 408/770 cut-off events. [2024-01-27 15:20:50,754 INFO L125 PetriNetUnfolderBase]: For 11653/11653 co-relation queries the response was YES. [2024-01-27 15:20:50,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5530 conditions, 770 events. 408/770 cut-off events. For 11653/11653 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3534 event pairs, 147 based on Foata normal form. 2/772 useless extension candidates. Maximal degree in co-relation 5444. Up to 649 conditions per place. [2024-01-27 15:20:50,758 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 116 selfloop transitions, 27 changer transitions 2/146 dead transitions. [2024-01-27 15:20:50,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 146 transitions, 1865 flow [2024-01-27 15:20:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:20:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:20:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2024-01-27 15:20:50,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-01-27 15:20:50,759 INFO L175 Difference]: Start difference. First operand has 170 places, 133 transitions, 1520 flow. Second operand 10 states and 74 transitions. [2024-01-27 15:20:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 146 transitions, 1865 flow [2024-01-27 15:20:50,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 146 transitions, 1764 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-01-27 15:20:50,781 INFO L231 Difference]: Finished difference. Result has 169 places, 131 transitions, 1452 flow [2024-01-27 15:20:50,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1452, PETRI_PLACES=169, PETRI_TRANSITIONS=131} [2024-01-27 15:20:50,782 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 146 predicate places. [2024-01-27 15:20:50,782 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 131 transitions, 1452 flow [2024-01-27 15:20:50,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:50,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:50,782 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:50,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-27 15:20:50,994 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:50,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1006933988, now seen corresponding path program 41 times [2024-01-27 15:20:50,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:50,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404486365] [2024-01-27 15:20:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:50,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:51,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:51,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404486365] [2024-01-27 15:20:51,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404486365] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:51,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477215784] [2024-01-27 15:20:51,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:51,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:51,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:51,428 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:51,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-27 15:20:51,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:51,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:20:51,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:51,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:51,986 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:51,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477215784] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:52,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:52,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:20:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378444823] [2024-01-27 15:20:52,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:20:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:20:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:20:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 131 transitions, 1452 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:52,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:52,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:52,449 INFO L124 PetriNetUnfolderBase]: 407/774 cut-off events. [2024-01-27 15:20:52,450 INFO L125 PetriNetUnfolderBase]: For 10164/10164 co-relation queries the response was YES. [2024-01-27 15:20:52,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 774 events. 407/774 cut-off events. For 10164/10164 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3574 event pairs, 88 based on Foata normal form. 2/776 useless extension candidates. Maximal degree in co-relation 5304. Up to 392 conditions per place. [2024-01-27 15:20:52,455 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 96 selfloop transitions, 47 changer transitions 8/152 dead transitions. [2024-01-27 15:20:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 152 transitions, 1898 flow [2024-01-27 15:20:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:20:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:20:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-01-27 15:20:52,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2024-01-27 15:20:52,456 INFO L175 Difference]: Start difference. First operand has 169 places, 131 transitions, 1452 flow. Second operand 9 states and 75 transitions. [2024-01-27 15:20:52,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 152 transitions, 1898 flow [2024-01-27 15:20:52,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 152 transitions, 1842 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:52,487 INFO L231 Difference]: Finished difference. Result has 168 places, 131 transitions, 1497 flow [2024-01-27 15:20:52,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1497, PETRI_PLACES=168, PETRI_TRANSITIONS=131} [2024-01-27 15:20:52,488 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 145 predicate places. [2024-01-27 15:20:52,488 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 131 transitions, 1497 flow [2024-01-27 15:20:52,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:52,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:52,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-27 15:20:52,703 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:52,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash 96219382, now seen corresponding path program 42 times [2024-01-27 15:20:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723267101] [2024-01-27 15:20:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:53,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:53,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723267101] [2024-01-27 15:20:53,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723267101] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:53,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272710816] [2024-01-27 15:20:53,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:53,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:53,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:53,094 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:53,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-27 15:20:53,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:20:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:53,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:53,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:53,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:53,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:53,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:53,573 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-27 15:20:53,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-27 15:20:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272710816] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:53,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:53,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:20:53,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928539102] [2024-01-27 15:20:53,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:53,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:53,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 131 transitions, 1497 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:53,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:53,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:53,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:53,961 INFO L124 PetriNetUnfolderBase]: 400/749 cut-off events. [2024-01-27 15:20:53,961 INFO L125 PetriNetUnfolderBase]: For 10742/10742 co-relation queries the response was YES. [2024-01-27 15:20:53,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 749 events. 400/749 cut-off events. For 10742/10742 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3388 event pairs, 84 based on Foata normal form. 2/751 useless extension candidates. Maximal degree in co-relation 5273. Up to 392 conditions per place. [2024-01-27 15:20:53,965 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 103 selfloop transitions, 48 changer transitions 6/158 dead transitions. [2024-01-27 15:20:53,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 158 transitions, 1977 flow [2024-01-27 15:20:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:20:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:20:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-01-27 15:20:53,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826086956521739 [2024-01-27 15:20:53,966 INFO L175 Difference]: Start difference. First operand has 168 places, 131 transitions, 1497 flow. Second operand 10 states and 88 transitions. [2024-01-27 15:20:53,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 158 transitions, 1977 flow [2024-01-27 15:20:53,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 158 transitions, 1873 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:53,993 INFO L231 Difference]: Finished difference. Result has 169 places, 131 transitions, 1495 flow [2024-01-27 15:20:53,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1495, PETRI_PLACES=169, PETRI_TRANSITIONS=131} [2024-01-27 15:20:53,993 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 146 predicate places. [2024-01-27 15:20:53,993 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 131 transitions, 1495 flow [2024-01-27 15:20:53,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:53,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:53,994 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:54,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:54,205 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:54,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash 909763475, now seen corresponding path program 43 times [2024-01-27 15:20:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:54,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621713769] [2024-01-27 15:20:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:54,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:54,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:54,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621713769] [2024-01-27 15:20:54,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621713769] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:54,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380453578] [2024-01-27 15:20:54,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:54,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:54,605 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:54,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-27 15:20:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:54,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:54,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:54,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:54,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-27 15:20:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:54,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:55,084 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:55,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:20:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:55,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380453578] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:55,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:55,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:20:55,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647408832] [2024-01-27 15:20:55,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:55,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:55,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:55,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:55,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 131 transitions, 1495 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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 15:20:55,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:55,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:55,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:55,490 INFO L124 PetriNetUnfolderBase]: 384/715 cut-off events. [2024-01-27 15:20:55,491 INFO L125 PetriNetUnfolderBase]: For 8901/8901 co-relation queries the response was YES. [2024-01-27 15:20:55,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 715 events. 384/715 cut-off events. For 8901/8901 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3152 event pairs, 129 based on Foata normal form. 4/719 useless extension candidates. Maximal degree in co-relation 4940. Up to 596 conditions per place. [2024-01-27 15:20:55,495 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 112 selfloop transitions, 27 changer transitions 4/144 dead transitions. [2024-01-27 15:20:55,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 144 transitions, 1852 flow [2024-01-27 15:20:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:20:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:20:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 75 transitions. [2024-01-27 15:20:55,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-27 15:20:55,496 INFO L175 Difference]: Start difference. First operand has 169 places, 131 transitions, 1495 flow. Second operand 10 states and 75 transitions. [2024-01-27 15:20:55,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 144 transitions, 1852 flow [2024-01-27 15:20:55,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 144 transitions, 1738 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-01-27 15:20:55,514 INFO L231 Difference]: Finished difference. Result has 167 places, 129 transitions, 1414 flow [2024-01-27 15:20:55,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1414, PETRI_PLACES=167, PETRI_TRANSITIONS=129} [2024-01-27 15:20:55,515 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 144 predicate places. [2024-01-27 15:20:55,515 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 129 transitions, 1414 flow [2024-01-27 15:20:55,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 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 15:20:55,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:55,515 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:55,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:55,725 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:55,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1236983780, now seen corresponding path program 44 times [2024-01-27 15:20:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:55,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552315711] [2024-01-27 15:20:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:20:56,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552315711] [2024-01-27 15:20:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552315711] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054684167] [2024-01-27 15:20:56,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:56,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:56,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:56,532 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:56,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-27 15:20:56,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:56,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:56,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:20:56,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:56,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:56,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:20:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:56,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:56,967 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:20:56,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:20:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:57,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054684167] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:57,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:57,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 25 [2024-01-27 15:20:57,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525170914] [2024-01-27 15:20:57,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:57,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:20:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:20:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:20:57,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:57,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 129 transitions, 1414 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:57,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:57,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:57,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:57,558 INFO L124 PetriNetUnfolderBase]: 379/697 cut-off events. [2024-01-27 15:20:57,559 INFO L125 PetriNetUnfolderBase]: For 8508/8508 co-relation queries the response was YES. [2024-01-27 15:20:57,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4822 conditions, 697 events. 379/697 cut-off events. For 8508/8508 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3004 event pairs, 123 based on Foata normal form. 2/699 useless extension candidates. Maximal degree in co-relation 4736. Up to 560 conditions per place. [2024-01-27 15:20:57,563 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 97 selfloop transitions, 48 changer transitions 2/148 dead transitions. [2024-01-27 15:20:57,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 148 transitions, 1803 flow [2024-01-27 15:20:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:20:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:20:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 145 transitions. [2024-01-27 15:20:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26268115942028986 [2024-01-27 15:20:57,564 INFO L175 Difference]: Start difference. First operand has 167 places, 129 transitions, 1414 flow. Second operand 24 states and 145 transitions. [2024-01-27 15:20:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 148 transitions, 1803 flow [2024-01-27 15:20:57,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 148 transitions, 1743 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:57,584 INFO L231 Difference]: Finished difference. Result has 179 places, 127 transitions, 1429 flow [2024-01-27 15:20:57,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1429, PETRI_PLACES=179, PETRI_TRANSITIONS=127} [2024-01-27 15:20:57,585 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 156 predicate places. [2024-01-27 15:20:57,585 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 127 transitions, 1429 flow [2024-01-27 15:20:57,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:57,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:57,585 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:57,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:57,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:57,797 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:57,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1174001159, now seen corresponding path program 45 times [2024-01-27 15:20:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:57,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464555977] [2024-01-27 15:20:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:58,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:58,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464555977] [2024-01-27 15:20:58,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464555977] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729370938] [2024-01-27 15:20:58,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:58,170 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-27 15:20:58,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:20:58,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:58,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:20:58,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:58,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:58,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:20:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:58,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:58,703 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:20:58,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:20:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:58,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729370938] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:58,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:20:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532318450] [2024-01-27 15:20:58,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:20:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:20:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:20:58,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:20:58,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 127 transitions, 1429 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:58,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:58,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:20:58,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:59,070 INFO L124 PetriNetUnfolderBase]: 364/669 cut-off events. [2024-01-27 15:20:59,070 INFO L125 PetriNetUnfolderBase]: For 7656/7656 co-relation queries the response was YES. [2024-01-27 15:20:59,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 669 events. 364/669 cut-off events. For 7656/7656 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2844 event pairs, 26 based on Foata normal form. 8/677 useless extension candidates. Maximal degree in co-relation 4574. Up to 260 conditions per place. [2024-01-27 15:20:59,074 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 102 selfloop transitions, 52 changer transitions 4/159 dead transitions. [2024-01-27 15:20:59,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 159 transitions, 1949 flow [2024-01-27 15:20:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:20:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:20:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2024-01-27 15:20:59,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-27 15:20:59,083 INFO L175 Difference]: Start difference. First operand has 179 places, 127 transitions, 1429 flow. Second operand 14 states and 112 transitions. [2024-01-27 15:20:59,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 159 transitions, 1949 flow [2024-01-27 15:20:59,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 159 transitions, 1853 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-01-27 15:20:59,104 INFO L231 Difference]: Finished difference. Result has 167 places, 124 transitions, 1410 flow [2024-01-27 15:20:59,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1410, PETRI_PLACES=167, PETRI_TRANSITIONS=124} [2024-01-27 15:20:59,104 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 144 predicate places. [2024-01-27 15:20:59,104 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 124 transitions, 1410 flow [2024-01-27 15:20:59,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:59,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:59,105 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:59,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-01-27 15:20:59,317 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:20:59,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1031176711, now seen corresponding path program 46 times [2024-01-27 15:20:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867159139] [2024-01-27 15:20:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:20:59,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867159139] [2024-01-27 15:20:59,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867159139] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381044778] [2024-01-27 15:20:59,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:59,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:59,667 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:59,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-01-27 15:20:59,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:59,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:20:59,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:00,012 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:21:00,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:21:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:00,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:00,121 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:21:00,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:21:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:00,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381044778] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:00,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:00,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-27 15:21:00,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130189285] [2024-01-27 15:21:00,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:00,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:21:00,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:00,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:21:00,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:21:00,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:00,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 124 transitions, 1410 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:00,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:00,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:00,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:00,446 INFO L124 PetriNetUnfolderBase]: 381/694 cut-off events. [2024-01-27 15:21:00,446 INFO L125 PetriNetUnfolderBase]: For 8278/8278 co-relation queries the response was YES. [2024-01-27 15:21:00,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 694 events. 381/694 cut-off events. For 8278/8278 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2963 event pairs, 32 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 4911. Up to 302 conditions per place. [2024-01-27 15:21:00,450 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 102 selfloop transitions, 52 changer transitions 0/155 dead transitions. [2024-01-27 15:21:00,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 155 transitions, 2000 flow [2024-01-27 15:21:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:21:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:21:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 95 transitions. [2024-01-27 15:21:00,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2024-01-27 15:21:00,451 INFO L175 Difference]: Start difference. First operand has 167 places, 124 transitions, 1410 flow. Second operand 12 states and 95 transitions. [2024-01-27 15:21:00,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 155 transitions, 2000 flow [2024-01-27 15:21:00,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 155 transitions, 1891 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-01-27 15:21:00,471 INFO L231 Difference]: Finished difference. Result has 167 places, 128 transitions, 1485 flow [2024-01-27 15:21:00,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1485, PETRI_PLACES=167, PETRI_TRANSITIONS=128} [2024-01-27 15:21:00,472 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 144 predicate places. [2024-01-27 15:21:00,472 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 128 transitions, 1485 flow [2024-01-27 15:21:00,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:00,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:00,472 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:00,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-01-27 15:21:00,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-01-27 15:21:00,679 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:00,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -284759405, now seen corresponding path program 47 times [2024-01-27 15:21:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:00,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457427728] [2024-01-27 15:21:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:00,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:01,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:01,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457427728] [2024-01-27 15:21:01,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457427728] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:01,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634519411] [2024-01-27 15:21:01,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:21:01,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:01,011 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:01,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-01-27 15:21:01,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:21:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:01,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:21:01,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:01,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:01,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-27 15:21:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:01,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:01,534 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:21:01,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:21:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:01,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634519411] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:01,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:01,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-27 15:21:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668219120] [2024-01-27 15:21:01,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:01,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:21:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:21:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:21:01,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:01,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 128 transitions, 1485 flow. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:01,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:01,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:01,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:01,871 INFO L124 PetriNetUnfolderBase]: 381/687 cut-off events. [2024-01-27 15:21:01,871 INFO L125 PetriNetUnfolderBase]: For 8926/8926 co-relation queries the response was YES. [2024-01-27 15:21:01,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 687 events. 381/687 cut-off events. For 8926/8926 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2923 event pairs, 117 based on Foata normal form. 4/691 useless extension candidates. Maximal degree in co-relation 4945. Up to 552 conditions per place. [2024-01-27 15:21:01,875 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 113 selfloop transitions, 31 changer transitions 0/145 dead transitions. [2024-01-27 15:21:01,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 145 transitions, 1936 flow [2024-01-27 15:21:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:21:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:21:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2024-01-27 15:21:01,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201581027667984 [2024-01-27 15:21:01,876 INFO L175 Difference]: Start difference. First operand has 167 places, 128 transitions, 1485 flow. Second operand 11 states and 81 transitions. [2024-01-27 15:21:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 145 transitions, 1936 flow [2024-01-27 15:21:01,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 145 transitions, 1819 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-01-27 15:21:01,895 INFO L231 Difference]: Finished difference. Result has 167 places, 129 transitions, 1457 flow [2024-01-27 15:21:01,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1457, PETRI_PLACES=167, PETRI_TRANSITIONS=129} [2024-01-27 15:21:01,896 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 144 predicate places. [2024-01-27 15:21:01,896 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 129 transitions, 1457 flow [2024-01-27 15:21:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:01,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:01,896 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:01,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:02,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-27 15:21:02,109 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:02,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash 759168953, now seen corresponding path program 48 times [2024-01-27 15:21:02,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:02,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276137095] [2024-01-27 15:21:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:02,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276137095] [2024-01-27 15:21:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276137095] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230799087] [2024-01-27 15:21:02,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:21:02,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:02,464 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:02,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-01-27 15:21:02,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:21:02,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:02,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:21:02,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:02,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:02,943 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:21:02,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:21:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230799087] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:02,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:02,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-27 15:21:02,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501518246] [2024-01-27 15:21:02,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:21:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:21:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:21:02,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:02,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 129 transitions, 1457 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:02,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:02,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:02,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:03,263 INFO L124 PetriNetUnfolderBase]: 399/710 cut-off events. [2024-01-27 15:21:03,264 INFO L125 PetriNetUnfolderBase]: For 8220/8220 co-relation queries the response was YES. [2024-01-27 15:21:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5193 conditions, 710 events. 399/710 cut-off events. For 8220/8220 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3024 event pairs, 24 based on Foata normal form. 4/714 useless extension candidates. Maximal degree in co-relation 5106. Up to 306 conditions per place. [2024-01-27 15:21:03,268 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 104 selfloop transitions, 51 changer transitions 0/156 dead transitions. [2024-01-27 15:21:03,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 156 transitions, 2007 flow [2024-01-27 15:21:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:21:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:21:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 82 transitions. [2024-01-27 15:21:03,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3565217391304348 [2024-01-27 15:21:03,269 INFO L175 Difference]: Start difference. First operand has 167 places, 129 transitions, 1457 flow. Second operand 10 states and 82 transitions. [2024-01-27 15:21:03,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 156 transitions, 2007 flow [2024-01-27 15:21:03,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 156 transitions, 1886 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-01-27 15:21:03,291 INFO L231 Difference]: Finished difference. Result has 164 places, 132 transitions, 1507 flow [2024-01-27 15:21:03,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1507, PETRI_PLACES=164, PETRI_TRANSITIONS=132} [2024-01-27 15:21:03,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 141 predicate places. [2024-01-27 15:21:03,291 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 132 transitions, 1507 flow [2024-01-27 15:21:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:03,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:03,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:03,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-01-27 15:21:03,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-01-27 15:21:03,504 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:03,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1442368972, now seen corresponding path program 49 times [2024-01-27 15:21:03,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:03,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144900906] [2024-01-27 15:21:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:03,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:04,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144900906] [2024-01-27 15:21:04,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144900906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460994342] [2024-01-27 15:21:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:21:04,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:04,036 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:04,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-01-27 15:21:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:04,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:04,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:04,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:04,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:04,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:04,741 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:21:04,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-01-27 15:21:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460994342] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:04,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:04,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-27 15:21:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957958471] [2024-01-27 15:21:04,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:21:04,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:04,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 132 transitions, 1507 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:04,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:04,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:04,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:05,650 INFO L124 PetriNetUnfolderBase]: 547/974 cut-off events. [2024-01-27 15:21:05,650 INFO L125 PetriNetUnfolderBase]: For 10185/10185 co-relation queries the response was YES. [2024-01-27 15:21:05,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 974 events. 547/974 cut-off events. For 10185/10185 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4610 event pairs, 36 based on Foata normal form. 1/975 useless extension candidates. Maximal degree in co-relation 6775. Up to 379 conditions per place. [2024-01-27 15:21:05,656 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 141 selfloop transitions, 70 changer transitions 3/215 dead transitions. [2024-01-27 15:21:05,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 215 transitions, 2770 flow [2024-01-27 15:21:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:21:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:21:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-01-27 15:21:05,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35038363171355497 [2024-01-27 15:21:05,657 INFO L175 Difference]: Start difference. First operand has 164 places, 132 transitions, 1507 flow. Second operand 17 states and 137 transitions. [2024-01-27 15:21:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 215 transitions, 2770 flow [2024-01-27 15:21:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 215 transitions, 2619 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-27 15:21:05,680 INFO L231 Difference]: Finished difference. Result has 177 places, 150 transitions, 1852 flow [2024-01-27 15:21:05,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1852, PETRI_PLACES=177, PETRI_TRANSITIONS=150} [2024-01-27 15:21:05,681 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 154 predicate places. [2024-01-27 15:21:05,681 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 150 transitions, 1852 flow [2024-01-27 15:21:05,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:05,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:05,682 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:05,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-01-27 15:21:05,894 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:05,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1485493804, now seen corresponding path program 50 times [2024-01-27 15:21:05,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:05,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683867007] [2024-01-27 15:21:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:21:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683867007] [2024-01-27 15:21:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683867007] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019089343] [2024-01-27 15:21:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:21:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:06,546 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:06,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-01-27 15:21:06,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:21:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:06,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:21:06,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:06,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:06,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:21:07,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:07,264 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:07,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019089343] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:07,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 32 [2024-01-27 15:21:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683686317] [2024-01-27 15:21:07,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:07,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:21:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:21:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:21:07,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:07,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 150 transitions, 1852 flow. Second operand has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:07,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:07,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:08,284 INFO L124 PetriNetUnfolderBase]: 623/1114 cut-off events. [2024-01-27 15:21:08,284 INFO L125 PetriNetUnfolderBase]: For 12826/12826 co-relation queries the response was YES. [2024-01-27 15:21:08,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8209 conditions, 1114 events. 623/1114 cut-off events. For 12826/12826 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5411 event pairs, 68 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 8117. Up to 716 conditions per place. [2024-01-27 15:21:08,292 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 117 selfloop transitions, 97 changer transitions 6/221 dead transitions. [2024-01-27 15:21:08,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 221 transitions, 2917 flow [2024-01-27 15:21:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:21:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:21:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 199 transitions. [2024-01-27 15:21:08,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32045088566827695 [2024-01-27 15:21:08,293 INFO L175 Difference]: Start difference. First operand has 177 places, 150 transitions, 1852 flow. Second operand 27 states and 199 transitions. [2024-01-27 15:21:08,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 221 transitions, 2917 flow [2024-01-27 15:21:08,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 221 transitions, 2602 flow, removed 83 selfloop flow, removed 9 redundant places. [2024-01-27 15:21:08,331 INFO L231 Difference]: Finished difference. Result has 199 places, 171 transitions, 2171 flow [2024-01-27 15:21:08,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2171, PETRI_PLACES=199, PETRI_TRANSITIONS=171} [2024-01-27 15:21:08,332 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 176 predicate places. [2024-01-27 15:21:08,332 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 171 transitions, 2171 flow [2024-01-27 15:21:08,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:08,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:08,333 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:08,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-01-27 15:21:08,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-01-27 15:21:08,540 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:08,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1935732812, now seen corresponding path program 51 times [2024-01-27 15:21:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210662063] [2024-01-27 15:21:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:09,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:09,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210662063] [2024-01-27 15:21:09,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210662063] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:09,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007909650] [2024-01-27 15:21:09,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:21:09,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:09,445 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:09,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-01-27 15:21:09,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:21:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:09,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:21:09,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:09,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:09,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:21:09,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:10,136 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:10,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:10,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007909650] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:10,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:10,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 36 [2024-01-27 15:21:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816221868] [2024-01-27 15:21:10,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:21:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:21:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:21:10,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:10,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 171 transitions, 2171 flow. Second operand has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:10,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:10,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:10,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:11,414 INFO L124 PetriNetUnfolderBase]: 627/1132 cut-off events. [2024-01-27 15:21:11,414 INFO L125 PetriNetUnfolderBase]: For 14292/14292 co-relation queries the response was YES. [2024-01-27 15:21:11,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8283 conditions, 1132 events. 627/1132 cut-off events. For 14292/14292 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5598 event pairs, 76 based on Foata normal form. 2/1134 useless extension candidates. Maximal degree in co-relation 8186. Up to 708 conditions per place. [2024-01-27 15:21:11,422 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 118 selfloop transitions, 97 changer transitions 7/223 dead transitions. [2024-01-27 15:21:11,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 223 transitions, 2905 flow [2024-01-27 15:21:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:21:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:21:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 195 transitions. [2024-01-27 15:21:11,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-27 15:21:11,423 INFO L175 Difference]: Start difference. First operand has 199 places, 171 transitions, 2171 flow. Second operand 26 states and 195 transitions. [2024-01-27 15:21:11,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 223 transitions, 2905 flow [2024-01-27 15:21:11,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 223 transitions, 2609 flow, removed 105 selfloop flow, removed 16 redundant places. [2024-01-27 15:21:11,467 INFO L231 Difference]: Finished difference. Result has 210 places, 173 transitions, 2108 flow [2024-01-27 15:21:11,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2108, PETRI_PLACES=210, PETRI_TRANSITIONS=173} [2024-01-27 15:21:11,467 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 187 predicate places. [2024-01-27 15:21:11,468 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 173 transitions, 2108 flow [2024-01-27 15:21:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:11,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:11,468 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:11,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:11,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:11,669 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:11,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash -897595152, now seen corresponding path program 52 times [2024-01-27 15:21:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:11,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548733475] [2024-01-27 15:21:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:11,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:12,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548733475] [2024-01-27 15:21:12,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548733475] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:12,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575333272] [2024-01-27 15:21:12,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:21:12,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:12,391 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:12,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-01-27 15:21:12,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:21:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:12,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:12,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:12,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:12,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:12,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:13,150 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:13,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:13,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575333272] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:13,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:13,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-27 15:21:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480646743] [2024-01-27 15:21:13,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:13,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:13,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:21:13,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:13,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 173 transitions, 2108 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 15:21:13,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:13,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:13,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:13,977 INFO L124 PetriNetUnfolderBase]: 646/1168 cut-off events. [2024-01-27 15:21:13,977 INFO L125 PetriNetUnfolderBase]: For 12792/12792 co-relation queries the response was YES. [2024-01-27 15:21:13,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8171 conditions, 1168 events. 646/1168 cut-off events. For 12792/12792 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5827 event pairs, 86 based on Foata normal form. 1/1169 useless extension candidates. Maximal degree in co-relation 8072. Up to 856 conditions per place. [2024-01-27 15:21:13,985 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 138 selfloop transitions, 67 changer transitions 3/209 dead transitions. [2024-01-27 15:21:13,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 2777 flow [2024-01-27 15:21:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:21:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:21:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 111 transitions. [2024-01-27 15:21:13,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447204968944099 [2024-01-27 15:21:13,985 INFO L175 Difference]: Start difference. First operand has 210 places, 173 transitions, 2108 flow. Second operand 14 states and 111 transitions. [2024-01-27 15:21:13,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 2777 flow [2024-01-27 15:21:14,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 209 transitions, 2617 flow, removed 6 selfloop flow, removed 22 redundant places. [2024-01-27 15:21:14,021 INFO L231 Difference]: Finished difference. Result has 205 places, 185 transitions, 2263 flow [2024-01-27 15:21:14,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2263, PETRI_PLACES=205, PETRI_TRANSITIONS=185} [2024-01-27 15:21:14,022 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2024-01-27 15:21:14,022 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 185 transitions, 2263 flow [2024-01-27 15:21:14,022 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 15:21:14,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:14,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:14,232 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1129665422, now seen corresponding path program 53 times [2024-01-27 15:21:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:14,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774440833] [2024-01-27 15:21:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:14,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774440833] [2024-01-27 15:21:14,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774440833] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819758848] [2024-01-27 15:21:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:21:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:14,684 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:14,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-01-27 15:21:15,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:21:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:15,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:21:15,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:15,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:15,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-27 15:21:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:15,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:15,442 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:15,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819758848] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:15,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:15,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-01-27 15:21:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668682750] [2024-01-27 15:21:15,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:21:15,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:21:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:21:15,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:15,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 185 transitions, 2263 flow. Second operand has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:15,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:15,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:15,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:16,297 INFO L124 PetriNetUnfolderBase]: 710/1286 cut-off events. [2024-01-27 15:21:16,297 INFO L125 PetriNetUnfolderBase]: For 16101/16101 co-relation queries the response was YES. [2024-01-27 15:21:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9368 conditions, 1286 events. 710/1286 cut-off events. For 16101/16101 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6498 event pairs, 77 based on Foata normal form. 3/1289 useless extension candidates. Maximal degree in co-relation 9266. Up to 858 conditions per place. [2024-01-27 15:21:16,306 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 163 selfloop transitions, 77 changer transitions 4/245 dead transitions. [2024-01-27 15:21:16,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 245 transitions, 3263 flow [2024-01-27 15:21:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:21:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:21:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 168 transitions. [2024-01-27 15:21:16,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652173913043478 [2024-01-27 15:21:16,307 INFO L175 Difference]: Start difference. First operand has 205 places, 185 transitions, 2263 flow. Second operand 20 states and 168 transitions. [2024-01-27 15:21:16,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 245 transitions, 3263 flow [2024-01-27 15:21:16,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 245 transitions, 3087 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-01-27 15:21:16,351 INFO L231 Difference]: Finished difference. Result has 219 places, 194 transitions, 2418 flow [2024-01-27 15:21:16,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2418, PETRI_PLACES=219, PETRI_TRANSITIONS=194} [2024-01-27 15:21:16,351 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 196 predicate places. [2024-01-27 15:21:16,351 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 194 transitions, 2418 flow [2024-01-27 15:21:16,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:16,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:16,352 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:16,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:16,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:16,563 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:16,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash 910006987, now seen corresponding path program 54 times [2024-01-27 15:21:16,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:16,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196825351] [2024-01-27 15:21:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196825351] [2024-01-27 15:21:16,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196825351] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960131827] [2024-01-27 15:21:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:21:16,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:16,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:16,976 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:16,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-01-27 15:21:17,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:21:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:17,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:21:17,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:17,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:17,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:21:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:17,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:17,703 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:21:17,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:21:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:17,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960131827] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:17,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:17,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 23 [2024-01-27 15:21:17,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988383613] [2024-01-27 15:21:17,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:17,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:21:17,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:21:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:21:17,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:17,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 194 transitions, 2418 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:17,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:17,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:17,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:18,523 INFO L124 PetriNetUnfolderBase]: 738/1342 cut-off events. [2024-01-27 15:21:18,523 INFO L125 PetriNetUnfolderBase]: For 18975/18975 co-relation queries the response was YES. [2024-01-27 15:21:18,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9923 conditions, 1342 events. 738/1342 cut-off events. For 18975/18975 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6922 event pairs, 85 based on Foata normal form. 18/1360 useless extension candidates. Maximal degree in co-relation 9818. Up to 843 conditions per place. [2024-01-27 15:21:18,533 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 162 selfloop transitions, 89 changer transitions 1/253 dead transitions. [2024-01-27 15:21:18,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 253 transitions, 3462 flow [2024-01-27 15:21:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:21:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:21:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 159 transitions. [2024-01-27 15:21:18,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456521739130435 [2024-01-27 15:21:18,534 INFO L175 Difference]: Start difference. First operand has 219 places, 194 transitions, 2418 flow. Second operand 20 states and 159 transitions. [2024-01-27 15:21:18,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 253 transitions, 3462 flow [2024-01-27 15:21:18,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 253 transitions, 3285 flow, removed 31 selfloop flow, removed 16 redundant places. [2024-01-27 15:21:18,584 INFO L231 Difference]: Finished difference. Result has 227 places, 206 transitions, 2686 flow [2024-01-27 15:21:18,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2686, PETRI_PLACES=227, PETRI_TRANSITIONS=206} [2024-01-27 15:21:18,584 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 204 predicate places. [2024-01-27 15:21:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 206 transitions, 2686 flow [2024-01-27 15:21:18,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:18,585 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:18,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:18,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-01-27 15:21:18,797 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1424481208, now seen corresponding path program 55 times [2024-01-27 15:21:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035224604] [2024-01-27 15:21:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:18,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:19,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:19,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035224604] [2024-01-27 15:21:19,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035224604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:19,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147336971] [2024-01-27 15:21:19,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:21:19,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:19,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:19,270 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:19,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-01-27 15:21:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:19,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:19,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:19,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:19,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:19,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:19,972 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:19,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147336971] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:20,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:20,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-27 15:21:20,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986876100] [2024-01-27 15:21:20,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:21:20,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:20,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 206 transitions, 2686 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 15:21:20,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:20,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:20,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:20,729 INFO L124 PetriNetUnfolderBase]: 743/1354 cut-off events. [2024-01-27 15:21:20,729 INFO L125 PetriNetUnfolderBase]: For 18761/18761 co-relation queries the response was YES. [2024-01-27 15:21:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10448 conditions, 1354 events. 743/1354 cut-off events. For 18761/18761 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6997 event pairs, 112 based on Foata normal form. 1/1355 useless extension candidates. Maximal degree in co-relation 10341. Up to 1017 conditions per place. [2024-01-27 15:21:20,739 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 160 selfloop transitions, 67 changer transitions 5/233 dead transitions. [2024-01-27 15:21:20,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 233 transitions, 3330 flow [2024-01-27 15:21:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:21:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:21:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 114 transitions. [2024-01-27 15:21:20,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33043478260869563 [2024-01-27 15:21:20,741 INFO L175 Difference]: Start difference. First operand has 227 places, 206 transitions, 2686 flow. Second operand 15 states and 114 transitions. [2024-01-27 15:21:20,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 233 transitions, 3330 flow [2024-01-27 15:21:20,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 233 transitions, 2859 flow, removed 101 selfloop flow, removed 24 redundant places. [2024-01-27 15:21:20,792 INFO L231 Difference]: Finished difference. Result has 219 places, 207 transitions, 2402 flow [2024-01-27 15:21:20,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2402, PETRI_PLACES=219, PETRI_TRANSITIONS=207} [2024-01-27 15:21:20,794 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 196 predicate places. [2024-01-27 15:21:20,794 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 207 transitions, 2402 flow [2024-01-27 15:21:20,795 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 15:21:20,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:20,795 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:20,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:21,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-01-27 15:21:21,007 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:21,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash 489668684, now seen corresponding path program 56 times [2024-01-27 15:21:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:21,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489356209] [2024-01-27 15:21:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:21,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489356209] [2024-01-27 15:21:21,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489356209] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851374923] [2024-01-27 15:21:21,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:21:21,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:21,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:21,482 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:21,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-01-27 15:21:21,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:21:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:21,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:21:21,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:21,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:21,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:21:21,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:22,285 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:22,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851374923] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:22,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:22,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 25 [2024-01-27 15:21:22,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153546240] [2024-01-27 15:21:22,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:22,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:21:22,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:22,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:21:22,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:21:22,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:22,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 207 transitions, 2402 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:22,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:22,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:22,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:23,329 INFO L124 PetriNetUnfolderBase]: 813/1483 cut-off events. [2024-01-27 15:21:23,329 INFO L125 PetriNetUnfolderBase]: For 20377/20377 co-relation queries the response was YES. [2024-01-27 15:21:23,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10937 conditions, 1483 events. 813/1483 cut-off events. For 20377/20377 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7903 event pairs, 113 based on Foata normal form. 2/1485 useless extension candidates. Maximal degree in co-relation 10838. Up to 1257 conditions per place. [2024-01-27 15:21:23,340 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 207 selfloop transitions, 58 changer transitions 4/270 dead transitions. [2024-01-27 15:21:23,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 270 transitions, 3531 flow [2024-01-27 15:21:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:21:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:21:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 159 transitions. [2024-01-27 15:21:23,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456521739130435 [2024-01-27 15:21:23,341 INFO L175 Difference]: Start difference. First operand has 219 places, 207 transitions, 2402 flow. Second operand 20 states and 159 transitions. [2024-01-27 15:21:23,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 270 transitions, 3531 flow [2024-01-27 15:21:23,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 270 transitions, 3373 flow, removed 16 selfloop flow, removed 13 redundant places. [2024-01-27 15:21:23,412 INFO L231 Difference]: Finished difference. Result has 232 places, 230 transitions, 2805 flow [2024-01-27 15:21:23,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2805, PETRI_PLACES=232, PETRI_TRANSITIONS=230} [2024-01-27 15:21:23,413 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 209 predicate places. [2024-01-27 15:21:23,413 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 230 transitions, 2805 flow [2024-01-27 15:21:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:23,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:23,413 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:23,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-01-27 15:21:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:23,620 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:23,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1287107910, now seen corresponding path program 57 times [2024-01-27 15:21:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:23,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97832487] [2024-01-27 15:21:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:23,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:24,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:24,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97832487] [2024-01-27 15:21:24,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97832487] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996903135] [2024-01-27 15:21:24,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:21:24,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:24,816 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:24,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-01-27 15:21:25,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:21:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:25,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:21:25,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:25,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:25,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:25,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:25,618 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:25,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:25,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996903135] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:25,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:25,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 38 [2024-01-27 15:21:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742209807] [2024-01-27 15:21:25,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:25,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:21:25,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:21:25,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:21:25,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:25,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 230 transitions, 2805 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:25,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:25,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:25,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:27,158 INFO L124 PetriNetUnfolderBase]: 904/1653 cut-off events. [2024-01-27 15:21:27,158 INFO L125 PetriNetUnfolderBase]: For 29114/29114 co-relation queries the response was YES. [2024-01-27 15:21:27,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12995 conditions, 1653 events. 904/1653 cut-off events. For 29114/29114 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9097 event pairs, 128 based on Foata normal form. 4/1657 useless extension candidates. Maximal degree in co-relation 12890. Up to 1437 conditions per place. [2024-01-27 15:21:27,169 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 215 selfloop transitions, 68 changer transitions 6/290 dead transitions. [2024-01-27 15:21:27,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 290 transitions, 4125 flow [2024-01-27 15:21:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:21:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:21:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 204 transitions. [2024-01-27 15:21:27,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2861150070126227 [2024-01-27 15:21:27,171 INFO L175 Difference]: Start difference. First operand has 232 places, 230 transitions, 2805 flow. Second operand 31 states and 204 transitions. [2024-01-27 15:21:27,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 290 transitions, 4125 flow [2024-01-27 15:21:27,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 290 transitions, 3814 flow, removed 106 selfloop flow, removed 12 redundant places. [2024-01-27 15:21:27,252 INFO L231 Difference]: Finished difference. Result has 255 places, 250 transitions, 3088 flow [2024-01-27 15:21:27,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3088, PETRI_PLACES=255, PETRI_TRANSITIONS=250} [2024-01-27 15:21:27,253 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 232 predicate places. [2024-01-27 15:21:27,253 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 250 transitions, 3088 flow [2024-01-27 15:21:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:27,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:27,253 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:27,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:27,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:27,466 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1947844656, now seen corresponding path program 58 times [2024-01-27 15:21:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130644121] [2024-01-27 15:21:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:21:28,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130644121] [2024-01-27 15:21:28,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130644121] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067860334] [2024-01-27 15:21:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:21:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:28,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:28,315 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:28,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-01-27 15:21:28,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:21:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:28,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:28,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:28,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:28,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:28,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:29,072 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:29,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:29,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067860334] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:29,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:29,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-01-27 15:21:29,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646116728] [2024-01-27 15:21:29,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:21:29,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:21:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:21:29,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:29,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 250 transitions, 3088 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:29,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:29,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:29,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:30,318 INFO L124 PetriNetUnfolderBase]: 910/1680 cut-off events. [2024-01-27 15:21:30,318 INFO L125 PetriNetUnfolderBase]: For 34481/34481 co-relation queries the response was YES. [2024-01-27 15:21:30,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13341 conditions, 1680 events. 910/1680 cut-off events. For 34481/34481 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9330 event pairs, 140 based on Foata normal form. 3/1683 useless extension candidates. Maximal degree in co-relation 13229. Up to 1425 conditions per place. [2024-01-27 15:21:30,331 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 219 selfloop transitions, 67 changer transitions 3/290 dead transitions. [2024-01-27 15:21:30,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 290 transitions, 4134 flow [2024-01-27 15:21:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:21:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:21:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 168 transitions. [2024-01-27 15:21:30,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-01-27 15:21:30,332 INFO L175 Difference]: Start difference. First operand has 255 places, 250 transitions, 3088 flow. Second operand 24 states and 168 transitions. [2024-01-27 15:21:30,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 290 transitions, 4134 flow [2024-01-27 15:21:30,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 290 transitions, 3778 flow, removed 143 selfloop flow, removed 20 redundant places. [2024-01-27 15:21:30,412 INFO L231 Difference]: Finished difference. Result has 261 places, 255 transitions, 3030 flow [2024-01-27 15:21:30,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3030, PETRI_PLACES=261, PETRI_TRANSITIONS=255} [2024-01-27 15:21:30,412 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2024-01-27 15:21:30,412 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 255 transitions, 3030 flow [2024-01-27 15:21:30,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:30,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:30,413 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:30,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:30,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-01-27 15:21:30,627 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:30,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash 180420016, now seen corresponding path program 59 times [2024-01-27 15:21:30,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:30,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258551986] [2024-01-27 15:21:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:30,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:31,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258551986] [2024-01-27 15:21:31,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258551986] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634422094] [2024-01-27 15:21:31,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:21:31,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:31,065 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:31,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-01-27 15:21:31,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:21:31,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:31,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:21:31,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:31,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:31,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-27 15:21:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:31,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:31,795 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:31,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:31,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634422094] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:31,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:31,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-01-27 15:21:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383201603] [2024-01-27 15:21:31,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:21:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:21:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:21:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 255 transitions, 3030 flow. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:31,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:31,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:32,643 INFO L124 PetriNetUnfolderBase]: 958/1769 cut-off events. [2024-01-27 15:21:32,644 INFO L125 PetriNetUnfolderBase]: For 35609/35609 co-relation queries the response was YES. [2024-01-27 15:21:32,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13937 conditions, 1769 events. 958/1769 cut-off events. For 35609/35609 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9983 event pairs, 148 based on Foata normal form. 2/1771 useless extension candidates. Maximal degree in co-relation 13823. Up to 1539 conditions per place. [2024-01-27 15:21:32,658 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 253 selfloop transitions, 49 changer transitions 3/306 dead transitions. [2024-01-27 15:21:32,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 306 transitions, 4225 flow [2024-01-27 15:21:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:21:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:21:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 150 transitions. [2024-01-27 15:21:32,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34324942791762014 [2024-01-27 15:21:32,659 INFO L175 Difference]: Start difference. First operand has 261 places, 255 transitions, 3030 flow. Second operand 19 states and 150 transitions. [2024-01-27 15:21:32,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 306 transitions, 4225 flow [2024-01-27 15:21:32,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 306 transitions, 4083 flow, removed 26 selfloop flow, removed 19 redundant places. [2024-01-27 15:21:32,744 INFO L231 Difference]: Finished difference. Result has 264 places, 266 transitions, 3253 flow [2024-01-27 15:21:32,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3253, PETRI_PLACES=264, PETRI_TRANSITIONS=266} [2024-01-27 15:21:32,744 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 241 predicate places. [2024-01-27 15:21:32,744 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 266 transitions, 3253 flow [2024-01-27 15:21:32,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:32,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:32,745 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:32,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:32,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-01-27 15:21:32,958 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:32,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash 894225290, now seen corresponding path program 60 times [2024-01-27 15:21:32,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:32,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262927543] [2024-01-27 15:21:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:32,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:33,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262927543] [2024-01-27 15:21:33,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262927543] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:33,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589950743] [2024-01-27 15:21:33,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:21:33,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:33,351 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:33,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-01-27 15:21:33,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:21:33,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:33,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-27 15:21:33,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:33,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:33,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:21:33,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:34,009 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:34,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:34,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589950743] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:34,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:34,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 22 [2024-01-27 15:21:34,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741027400] [2024-01-27 15:21:34,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:34,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:21:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:21:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:21:34,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:34,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 266 transitions, 3253 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:34,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:34,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:34,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:34,891 INFO L124 PetriNetUnfolderBase]: 970/1799 cut-off events. [2024-01-27 15:21:34,891 INFO L125 PetriNetUnfolderBase]: For 39768/39768 co-relation queries the response was YES. [2024-01-27 15:21:34,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 1799 events. 970/1799 cut-off events. For 39768/39768 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10238 event pairs, 154 based on Foata normal form. 2/1801 useless extension candidates. Maximal degree in co-relation 14426. Up to 1539 conditions per place. [2024-01-27 15:21:34,907 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 248 selfloop transitions, 54 changer transitions 3/306 dead transitions. [2024-01-27 15:21:34,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 306 transitions, 4284 flow [2024-01-27 15:21:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:21:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:21:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-01-27 15:21:34,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318077803203661 [2024-01-27 15:21:34,909 INFO L175 Difference]: Start difference. First operand has 264 places, 266 transitions, 3253 flow. Second operand 19 states and 145 transitions. [2024-01-27 15:21:34,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 306 transitions, 4284 flow [2024-01-27 15:21:35,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 306 transitions, 4114 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-01-27 15:21:35,009 INFO L231 Difference]: Finished difference. Result has 272 places, 268 transitions, 3272 flow [2024-01-27 15:21:35,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3272, PETRI_PLACES=272, PETRI_TRANSITIONS=268} [2024-01-27 15:21:35,009 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 249 predicate places. [2024-01-27 15:21:35,009 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 268 transitions, 3272 flow [2024-01-27 15:21:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:35,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:35,010 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:35,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-01-27 15:21:35,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:35,212 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:35,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash 862715978, now seen corresponding path program 61 times [2024-01-27 15:21:35,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665398647] [2024-01-27 15:21:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:35,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:35,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665398647] [2024-01-27 15:21:35,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665398647] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:35,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868706471] [2024-01-27 15:21:35,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:21:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:35,746 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:35,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-01-27 15:21:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:36,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:36,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:36,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:36,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:36,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:36,505 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:36,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:36,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868706471] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:36,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:36,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-01-27 15:21:36,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711363483] [2024-01-27 15:21:36,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:36,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:21:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:21:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:21:36,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:36,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 268 transitions, 3272 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:36,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:36,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:36,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:37,905 INFO L124 PetriNetUnfolderBase]: 1000/1876 cut-off events. [2024-01-27 15:21:37,905 INFO L125 PetriNetUnfolderBase]: For 45136/45136 co-relation queries the response was YES. [2024-01-27 15:21:37,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15283 conditions, 1876 events. 1000/1876 cut-off events. For 45136/45136 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10980 event pairs, 173 based on Foata normal form. 3/1879 useless extension candidates. Maximal degree in co-relation 15164. Up to 1556 conditions per place. [2024-01-27 15:21:37,919 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 254 selfloop transitions, 56 changer transitions 6/317 dead transitions. [2024-01-27 15:21:37,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 317 transitions, 4409 flow [2024-01-27 15:21:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:21:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:21:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 160 transitions. [2024-01-27 15:21:37,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-27 15:21:37,920 INFO L175 Difference]: Start difference. First operand has 272 places, 268 transitions, 3272 flow. Second operand 20 states and 160 transitions. [2024-01-27 15:21:37,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 317 transitions, 4409 flow [2024-01-27 15:21:38,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 317 transitions, 4319 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-01-27 15:21:38,034 INFO L231 Difference]: Finished difference. Result has 280 places, 273 transitions, 3486 flow [2024-01-27 15:21:38,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3486, PETRI_PLACES=280, PETRI_TRANSITIONS=273} [2024-01-27 15:21:38,035 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 257 predicate places. [2024-01-27 15:21:38,035 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 273 transitions, 3486 flow [2024-01-27 15:21:38,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:38,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:38,035 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:38,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-01-27 15:21:38,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-01-27 15:21:38,248 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:38,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1179510436, now seen corresponding path program 62 times [2024-01-27 15:21:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001502511] [2024-01-27 15:21:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:38,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:39,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001502511] [2024-01-27 15:21:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001502511] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824090788] [2024-01-27 15:21:39,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:21:39,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:39,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:39,212 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:39,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-01-27 15:21:39,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:21:39,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:39,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:21:39,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:39,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:39,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:21:39,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:40,014 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:40,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824090788] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:40,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:40,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 37 [2024-01-27 15:21:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846174895] [2024-01-27 15:21:40,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:21:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:21:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:21:40,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:40,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 273 transitions, 3486 flow. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:40,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:40,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:40,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:41,214 INFO L124 PetriNetUnfolderBase]: 1078/2023 cut-off events. [2024-01-27 15:21:41,214 INFO L125 PetriNetUnfolderBase]: For 53900/53900 co-relation queries the response was YES. [2024-01-27 15:21:41,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17305 conditions, 2023 events. 1078/2023 cut-off events. For 53900/53900 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12003 event pairs, 364 based on Foata normal form. 3/2026 useless extension candidates. Maximal degree in co-relation 17182. Up to 1741 conditions per place. [2024-01-27 15:21:41,232 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 265 selfloop transitions, 64 changer transitions 3/333 dead transitions. [2024-01-27 15:21:41,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 333 transitions, 5063 flow [2024-01-27 15:21:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:21:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:21:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 168 transitions. [2024-01-27 15:21:41,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33201581027667987 [2024-01-27 15:21:41,234 INFO L175 Difference]: Start difference. First operand has 280 places, 273 transitions, 3486 flow. Second operand 22 states and 168 transitions. [2024-01-27 15:21:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 333 transitions, 5063 flow [2024-01-27 15:21:41,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 333 transitions, 4936 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-01-27 15:21:41,375 INFO L231 Difference]: Finished difference. Result has 291 places, 287 transitions, 3925 flow [2024-01-27 15:21:41,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3925, PETRI_PLACES=291, PETRI_TRANSITIONS=287} [2024-01-27 15:21:41,377 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 268 predicate places. [2024-01-27 15:21:41,377 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 287 transitions, 3925 flow [2024-01-27 15:21:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:41,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:41,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:41,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:41,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:41,590 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:41,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:41,591 INFO L85 PathProgramCache]: Analyzing trace with hash -805945150, now seen corresponding path program 63 times [2024-01-27 15:21:41,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:41,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313069336] [2024-01-27 15:21:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:41,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:42,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313069336] [2024-01-27 15:21:42,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313069336] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861068345] [2024-01-27 15:21:42,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:21:42,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:42,564 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:42,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-01-27 15:21:42,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:21:42,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:42,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:21:42,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:42,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:42,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:42,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:43,346 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:21:43,348 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-01-27 15:21:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861068345] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:43,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 33 [2024-01-27 15:21:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760904755] [2024-01-27 15:21:43,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:21:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:43,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:21:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:21:43,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:43,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 287 transitions, 3925 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:43,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:43,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:43,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:44,531 INFO L124 PetriNetUnfolderBase]: 1186/2214 cut-off events. [2024-01-27 15:21:44,531 INFO L125 PetriNetUnfolderBase]: For 67215/67215 co-relation queries the response was YES. [2024-01-27 15:21:44,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19879 conditions, 2214 events. 1186/2214 cut-off events. For 67215/67215 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13408 event pairs, 214 based on Foata normal form. 1/2215 useless extension candidates. Maximal degree in co-relation 19752. Up to 904 conditions per place. [2024-01-27 15:21:44,553 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 213 selfloop transitions, 127 changer transitions 1/342 dead transitions. [2024-01-27 15:21:44,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 342 transitions, 5531 flow [2024-01-27 15:21:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:21:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:21:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 132 transitions. [2024-01-27 15:21:44,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30205949656750575 [2024-01-27 15:21:44,580 INFO L175 Difference]: Start difference. First operand has 291 places, 287 transitions, 3925 flow. Second operand 19 states and 132 transitions. [2024-01-27 15:21:44,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 342 transitions, 5531 flow [2024-01-27 15:21:44,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 342 transitions, 5257 flow, removed 108 selfloop flow, removed 13 redundant places. [2024-01-27 15:21:44,749 INFO L231 Difference]: Finished difference. Result has 300 places, 299 transitions, 4283 flow [2024-01-27 15:21:44,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4283, PETRI_PLACES=300, PETRI_TRANSITIONS=299} [2024-01-27 15:21:44,750 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2024-01-27 15:21:44,750 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 299 transitions, 4283 flow [2024-01-27 15:21:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:44,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:44,750 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:44,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-01-27 15:21:44,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:44,956 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:44,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2079140696, now seen corresponding path program 64 times [2024-01-27 15:21:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:44,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854067635] [2024-01-27 15:21:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854067635] [2024-01-27 15:21:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854067635] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636095967] [2024-01-27 15:21:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:21:45,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:45,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:45,408 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:45,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-01-27 15:21:45,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:21:45,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:45,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:45,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:45,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:45,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:45,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:46,094 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:46,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:46,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636095967] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:46,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:46,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-27 15:21:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662842846] [2024-01-27 15:21:46,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:21:46,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:46,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 299 transitions, 4283 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 15:21:46,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:46,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:46,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:47,274 INFO L124 PetriNetUnfolderBase]: 1268/2372 cut-off events. [2024-01-27 15:21:47,275 INFO L125 PetriNetUnfolderBase]: For 75493/75493 co-relation queries the response was YES. [2024-01-27 15:21:47,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22043 conditions, 2372 events. 1268/2372 cut-off events. For 75493/75493 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14583 event pairs, 360 based on Foata normal form. 4/2376 useless extension candidates. Maximal degree in co-relation 21912. Up to 1752 conditions per place. [2024-01-27 15:21:47,300 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 272 selfloop transitions, 95 changer transitions 7/375 dead transitions. [2024-01-27 15:21:47,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 375 transitions, 6205 flow [2024-01-27 15:21:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:21:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:21:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 178 transitions. [2024-01-27 15:21:47,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35177865612648224 [2024-01-27 15:21:47,306 INFO L175 Difference]: Start difference. First operand has 300 places, 299 transitions, 4283 flow. Second operand 22 states and 178 transitions. [2024-01-27 15:21:47,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 375 transitions, 6205 flow [2024-01-27 15:21:47,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 375 transitions, 6020 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-01-27 15:21:47,503 INFO L231 Difference]: Finished difference. Result has 316 places, 318 transitions, 4916 flow [2024-01-27 15:21:47,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4916, PETRI_PLACES=316, PETRI_TRANSITIONS=318} [2024-01-27 15:21:47,504 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 293 predicate places. [2024-01-27 15:21:47,504 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 318 transitions, 4916 flow [2024-01-27 15:21:47,504 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 15:21:47,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:47,504 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:47,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-01-27 15:21:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-01-27 15:21:47,716 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1857849708, now seen corresponding path program 65 times [2024-01-27 15:21:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598108164] [2024-01-27 15:21:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:48,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598108164] [2024-01-27 15:21:48,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598108164] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353259287] [2024-01-27 15:21:48,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:21:48,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:48,187 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:48,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-01-27 15:21:48,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:21:48,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:48,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:21:48,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:48,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:48,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-27 15:21:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:48,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:48,933 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:21:48,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:21:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:49,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353259287] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:49,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:49,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 27 [2024-01-27 15:21:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632039446] [2024-01-27 15:21:49,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:21:49,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:49,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 318 transitions, 4916 flow. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:49,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:49,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:49,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:50,166 INFO L124 PetriNetUnfolderBase]: 1316/2461 cut-off events. [2024-01-27 15:21:50,166 INFO L125 PetriNetUnfolderBase]: For 93841/93841 co-relation queries the response was YES. [2024-01-27 15:21:50,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24137 conditions, 2461 events. 1316/2461 cut-off events. For 93841/93841 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15247 event pairs, 380 based on Foata normal form. 2/2463 useless extension candidates. Maximal degree in co-relation 24001. Up to 1850 conditions per place. [2024-01-27 15:21:50,189 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 274 selfloop transitions, 97 changer transitions 3/375 dead transitions. [2024-01-27 15:21:50,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 375 transitions, 6450 flow [2024-01-27 15:21:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:21:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:21:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2024-01-27 15:21:50,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33747412008281574 [2024-01-27 15:21:50,191 INFO L175 Difference]: Start difference. First operand has 316 places, 318 transitions, 4916 flow. Second operand 21 states and 163 transitions. [2024-01-27 15:21:50,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 375 transitions, 6450 flow [2024-01-27 15:21:50,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 375 transitions, 6052 flow, removed 172 selfloop flow, removed 11 redundant places. [2024-01-27 15:21:50,481 INFO L231 Difference]: Finished difference. Result has 328 places, 327 transitions, 5011 flow [2024-01-27 15:21:50,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5011, PETRI_PLACES=328, PETRI_TRANSITIONS=327} [2024-01-27 15:21:50,482 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 305 predicate places. [2024-01-27 15:21:50,482 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 327 transitions, 5011 flow [2024-01-27 15:21:50,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:50,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:50,482 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:50,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:50,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:50,695 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:50,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1300838970, now seen corresponding path program 66 times [2024-01-27 15:21:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:50,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59962175] [2024-01-27 15:21:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:21:51,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59962175] [2024-01-27 15:21:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59962175] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555084635] [2024-01-27 15:21:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:21:51,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:51,583 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:51,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-01-27 15:21:51,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:21:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:51,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:21:51,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:52,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:52,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:52,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:52,383 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:52,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:52,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555084635] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:52,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:52,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2024-01-27 15:21:52,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350055502] [2024-01-27 15:21:52,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:52,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:21:52,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:21:52,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:21:52,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:52,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 327 transitions, 5011 flow. Second operand has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:52,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:52,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:52,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:53,690 INFO L124 PetriNetUnfolderBase]: 1333/2493 cut-off events. [2024-01-27 15:21:53,690 INFO L125 PetriNetUnfolderBase]: For 92494/92494 co-relation queries the response was YES. [2024-01-27 15:21:53,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24173 conditions, 2493 events. 1333/2493 cut-off events. For 92494/92494 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15490 event pairs, 400 based on Foata normal form. 1/2494 useless extension candidates. Maximal degree in co-relation 24034. Up to 1981 conditions per place. [2024-01-27 15:21:53,718 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 258 selfloop transitions, 102 changer transitions 4/365 dead transitions. [2024-01-27 15:21:53,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 365 transitions, 6279 flow [2024-01-27 15:21:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:21:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:21:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 140 transitions. [2024-01-27 15:21:53,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2898550724637681 [2024-01-27 15:21:53,719 INFO L175 Difference]: Start difference. First operand has 328 places, 327 transitions, 5011 flow. Second operand 21 states and 140 transitions. [2024-01-27 15:21:53,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 365 transitions, 6279 flow [2024-01-27 15:21:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 365 transitions, 6064 flow, removed 70 selfloop flow, removed 14 redundant places. [2024-01-27 15:21:54,016 INFO L231 Difference]: Finished difference. Result has 337 places, 338 transitions, 5372 flow [2024-01-27 15:21:54,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5372, PETRI_PLACES=337, PETRI_TRANSITIONS=338} [2024-01-27 15:21:54,017 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 314 predicate places. [2024-01-27 15:21:54,017 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 338 transitions, 5372 flow [2024-01-27 15:21:54,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:54,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:54,017 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:54,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:54,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:54,230 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:54,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:54,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2108330046, now seen corresponding path program 67 times [2024-01-27 15:21:54,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:54,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133586233] [2024-01-27 15:21:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:54,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:21:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133586233] [2024-01-27 15:21:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133586233] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365041447] [2024-01-27 15:21:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:21:55,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:55,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:55,026 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:55,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-01-27 15:21:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:55,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:21:55,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:55,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:55,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:21:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:55,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:55,764 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:55,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365041447] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:55,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-01-27 15:21:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584805563] [2024-01-27 15:21:55,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:21:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:21:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:21:55,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:55,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 338 transitions, 5372 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:55,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:55,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:55,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:57,246 INFO L124 PetriNetUnfolderBase]: 1404/2624 cut-off events. [2024-01-27 15:21:57,247 INFO L125 PetriNetUnfolderBase]: For 108043/108043 co-relation queries the response was YES. [2024-01-27 15:21:57,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26244 conditions, 2624 events. 1404/2624 cut-off events. For 108043/108043 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16515 event pairs, 470 based on Foata normal form. 2/2626 useless extension candidates. Maximal degree in co-relation 26101. Up to 2367 conditions per place. [2024-01-27 15:21:57,274 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 316 selfloop transitions, 78 changer transitions 5/400 dead transitions. [2024-01-27 15:21:57,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 400 transitions, 7207 flow [2024-01-27 15:21:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:21:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:21:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 180 transitions. [2024-01-27 15:21:57,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3010033444816054 [2024-01-27 15:21:57,275 INFO L175 Difference]: Start difference. First operand has 337 places, 338 transitions, 5372 flow. Second operand 26 states and 180 transitions. [2024-01-27 15:21:57,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 400 transitions, 7207 flow [2024-01-27 15:21:57,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 400 transitions, 6749 flow, removed 135 selfloop flow, removed 14 redundant places. [2024-01-27 15:21:57,604 INFO L231 Difference]: Finished difference. Result has 353 places, 362 transitions, 5895 flow [2024-01-27 15:21:57,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5895, PETRI_PLACES=353, PETRI_TRANSITIONS=362} [2024-01-27 15:21:57,605 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 330 predicate places. [2024-01-27 15:21:57,605 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 362 transitions, 5895 flow [2024-01-27 15:21:57,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:57,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:57,605 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:57,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:57,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:57,817 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:21:57,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:57,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1677971022, now seen corresponding path program 68 times [2024-01-27 15:21:57,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:57,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668945832] [2024-01-27 15:21:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:57,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668945832] [2024-01-27 15:21:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668945832] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659184565] [2024-01-27 15:21:58,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:21:58,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:58,314 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:58,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-01-27 15:21:58,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:21:58,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:58,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:21:58,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:58,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:58,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:21:58,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:59,124 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:21:59,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:21:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:21:59,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659184565] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:59,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:59,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-01-27 15:21:59,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756166097] [2024-01-27 15:21:59,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:21:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:21:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:21:59,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:21:59,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 362 transitions, 5895 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:59,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:59,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:21:59,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:00,266 INFO L124 PetriNetUnfolderBase]: 1406/2633 cut-off events. [2024-01-27 15:22:00,267 INFO L125 PetriNetUnfolderBase]: For 107063/107063 co-relation queries the response was YES. [2024-01-27 15:22:00,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25996 conditions, 2633 events. 1406/2633 cut-off events. For 107063/107063 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 16635 event pairs, 394 based on Foata normal form. 1/2634 useless extension candidates. Maximal degree in co-relation 25849. Up to 2108 conditions per place. [2024-01-27 15:22:00,297 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 292 selfloop transitions, 93 changer transitions 1/387 dead transitions. [2024-01-27 15:22:00,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 387 transitions, 6876 flow [2024-01-27 15:22:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:22:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:22:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 108 transitions. [2024-01-27 15:22:00,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3130434782608696 [2024-01-27 15:22:00,299 INFO L175 Difference]: Start difference. First operand has 353 places, 362 transitions, 5895 flow. Second operand 15 states and 108 transitions. [2024-01-27 15:22:00,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 387 transitions, 6876 flow [2024-01-27 15:22:00,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 387 transitions, 6269 flow, removed 271 selfloop flow, removed 15 redundant places. [2024-01-27 15:22:00,718 INFO L231 Difference]: Finished difference. Result has 355 places, 367 transitions, 5595 flow [2024-01-27 15:22:00,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5595, PETRI_PLACES=355, PETRI_TRANSITIONS=367} [2024-01-27 15:22:00,718 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 332 predicate places. [2024-01-27 15:22:00,719 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 367 transitions, 5595 flow [2024-01-27 15:22:00,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:00,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:00,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:00,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:00,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-01-27 15:22:00,931 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:00,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1918777734, now seen corresponding path program 69 times [2024-01-27 15:22:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:00,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39410961] [2024-01-27 15:22:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:01,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39410961] [2024-01-27 15:22:01,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39410961] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322341494] [2024-01-27 15:22:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:22:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:01,356 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:01,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-01-27 15:22:01,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:22:01,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:01,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:22:01,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:01,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:01,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:22:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:01,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:02,130 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:22:02,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:22:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322341494] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:02,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:02,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-01-27 15:22:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581102157] [2024-01-27 15:22:02,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:02,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:22:02,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:22:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:22:02,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:02,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 367 transitions, 5595 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:02,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:02,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:02,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:03,408 INFO L124 PetriNetUnfolderBase]: 1416/2680 cut-off events. [2024-01-27 15:22:03,408 INFO L125 PetriNetUnfolderBase]: For 103946/103946 co-relation queries the response was YES. [2024-01-27 15:22:03,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25684 conditions, 2680 events. 1416/2680 cut-off events. For 103946/103946 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17253 event pairs, 480 based on Foata normal form. 3/2681 useless extension candidates. Maximal degree in co-relation 25537. Up to 2355 conditions per place. [2024-01-27 15:22:03,437 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 338 selfloop transitions, 65 changer transitions 6/410 dead transitions. [2024-01-27 15:22:03,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 410 transitions, 6898 flow [2024-01-27 15:22:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:22:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:22:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 152 transitions. [2024-01-27 15:22:03,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33043478260869563 [2024-01-27 15:22:03,438 INFO L175 Difference]: Start difference. First operand has 355 places, 367 transitions, 5595 flow. Second operand 20 states and 152 transitions. [2024-01-27 15:22:03,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 410 transitions, 6898 flow [2024-01-27 15:22:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 410 transitions, 6662 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-01-27 15:22:03,801 INFO L231 Difference]: Finished difference. Result has 367 places, 373 transitions, 5732 flow [2024-01-27 15:22:03,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5359, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5732, PETRI_PLACES=367, PETRI_TRANSITIONS=373} [2024-01-27 15:22:03,801 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 344 predicate places. [2024-01-27 15:22:03,801 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 373 transitions, 5732 flow [2024-01-27 15:22:03,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:03,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:03,802 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:03,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:04,005 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:04,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1717366014, now seen corresponding path program 70 times [2024-01-27 15:22:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627805448] [2024-01-27 15:22:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:04,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627805448] [2024-01-27 15:22:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627805448] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065177348] [2024-01-27 15:22:04,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:22:04,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:04,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:04,446 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:04,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-01-27 15:22:04,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:22:04,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:04,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:22:04,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:04,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:04,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:22:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:04,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:05,267 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:22:05,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-01-27 15:22:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065177348] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:05,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:05,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-01-27 15:22:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383175680] [2024-01-27 15:22:05,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:22:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:22:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:22:05,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:05,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 373 transitions, 5732 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:05,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:05,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:05,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:06,699 INFO L124 PetriNetUnfolderBase]: 1478/2798 cut-off events. [2024-01-27 15:22:06,708 INFO L125 PetriNetUnfolderBase]: For 114691/114691 co-relation queries the response was YES. [2024-01-27 15:22:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 2798 events. 1478/2798 cut-off events. For 114691/114691 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18216 event pairs, 482 based on Foata normal form. 2/2800 useless extension candidates. Maximal degree in co-relation 27071. Up to 2518 conditions per place. [2024-01-27 15:22:06,746 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 372 selfloop transitions, 57 changer transitions 4/434 dead transitions. [2024-01-27 15:22:06,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 434 transitions, 7496 flow [2024-01-27 15:22:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:22:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:22:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 155 transitions. [2024-01-27 15:22:06,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35469107551487417 [2024-01-27 15:22:06,748 INFO L175 Difference]: Start difference. First operand has 367 places, 373 transitions, 5732 flow. Second operand 19 states and 155 transitions. [2024-01-27 15:22:06,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 434 transitions, 7496 flow [2024-01-27 15:22:07,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 434 transitions, 7316 flow, removed 58 selfloop flow, removed 14 redundant places. [2024-01-27 15:22:07,244 INFO L231 Difference]: Finished difference. Result has 376 places, 390 transitions, 6245 flow [2024-01-27 15:22:07,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6245, PETRI_PLACES=376, PETRI_TRANSITIONS=390} [2024-01-27 15:22:07,245 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 353 predicate places. [2024-01-27 15:22:07,245 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 390 transitions, 6245 flow [2024-01-27 15:22:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:07,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:07,245 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:07,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:07,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:07,459 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:07,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash -823682054, now seen corresponding path program 71 times [2024-01-27 15:22:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:07,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932065985] [2024-01-27 15:22:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932065985] [2024-01-27 15:22:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932065985] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804633664] [2024-01-27 15:22:07,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:22:07,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:07,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:07,916 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:07,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-01-27 15:22:08,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:22:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:08,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:22:08,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:08,464 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:22:08,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-01-27 15:22:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:08,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:08,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:08,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2024-01-27 15:22:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:08,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804633664] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:08,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:08,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-01-27 15:22:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79629093] [2024-01-27 15:22:08,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:08,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:22:08,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:22:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:22:08,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:08,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 390 transitions, 6245 flow. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:08,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:08,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:08,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:10,380 INFO L124 PetriNetUnfolderBase]: 1503/2856 cut-off events. [2024-01-27 15:22:10,380 INFO L125 PetriNetUnfolderBase]: For 130267/130267 co-relation queries the response was YES. [2024-01-27 15:22:10,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28938 conditions, 2856 events. 1503/2856 cut-off events. For 130267/130267 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18784 event pairs, 674 based on Foata normal form. 4/2858 useless extension candidates. Maximal degree in co-relation 28783. Up to 2588 conditions per place. [2024-01-27 15:22:10,416 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 380 selfloop transitions, 54 changer transitions 13/448 dead transitions. [2024-01-27 15:22:10,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 448 transitions, 8086 flow [2024-01-27 15:22:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:22:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:22:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 153 transitions. [2024-01-27 15:22:10,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3501144164759725 [2024-01-27 15:22:10,418 INFO L175 Difference]: Start difference. First operand has 376 places, 390 transitions, 6245 flow. Second operand 19 states and 153 transitions. [2024-01-27 15:22:10,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 448 transitions, 8086 flow [2024-01-27 15:22:11,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 448 transitions, 7680 flow, removed 177 selfloop flow, removed 10 redundant places. [2024-01-27 15:22:11,063 INFO L231 Difference]: Finished difference. Result has 390 places, 403 transitions, 6538 flow [2024-01-27 15:22:11,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6538, PETRI_PLACES=390, PETRI_TRANSITIONS=403} [2024-01-27 15:22:11,064 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 367 predicate places. [2024-01-27 15:22:11,064 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 403 transitions, 6538 flow [2024-01-27 15:22:11,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:11,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:11,064 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:11,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:11,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-01-27 15:22:11,280 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:11,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1177965944, now seen corresponding path program 72 times [2024-01-27 15:22:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:11,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744165564] [2024-01-27 15:22:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:11,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744165564] [2024-01-27 15:22:11,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744165564] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739412355] [2024-01-27 15:22:11,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:22:11,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:11,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:11,767 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:11,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-01-27 15:22:12,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:22:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:12,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-27 15:22:12,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:12,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:12,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:22:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-01-27 15:22:12,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:12,514 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-27 15:22:12,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-27 15:22:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739412355] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:12,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:12,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 10] total 29 [2024-01-27 15:22:12,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912642466] [2024-01-27 15:22:12,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:12,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:22:12,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:22:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:22:12,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:12,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 403 transitions, 6538 flow. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:12,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:12,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:12,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:13,872 INFO L124 PetriNetUnfolderBase]: 1518/2882 cut-off events. [2024-01-27 15:22:13,872 INFO L125 PetriNetUnfolderBase]: For 135995/135995 co-relation queries the response was YES. [2024-01-27 15:22:13,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29320 conditions, 2882 events. 1518/2882 cut-off events. For 135995/135995 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18923 event pairs, 500 based on Foata normal form. 2/2882 useless extension candidates. Maximal degree in co-relation 29159. Up to 2584 conditions per place. [2024-01-27 15:22:13,908 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 366 selfloop transitions, 71 changer transitions 5/443 dead transitions. [2024-01-27 15:22:13,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 443 transitions, 7919 flow [2024-01-27 15:22:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:22:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:22:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 161 transitions. [2024-01-27 15:22:13,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-01-27 15:22:13,910 INFO L175 Difference]: Start difference. First operand has 390 places, 403 transitions, 6538 flow. Second operand 22 states and 161 transitions. [2024-01-27 15:22:13,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 443 transitions, 7919 flow [2024-01-27 15:22:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 443 transitions, 7362 flow, removed 255 selfloop flow, removed 11 redundant places. [2024-01-27 15:22:14,535 INFO L231 Difference]: Finished difference. Result has 401 places, 405 transitions, 6287 flow [2024-01-27 15:22:14,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6287, PETRI_PLACES=401, PETRI_TRANSITIONS=405} [2024-01-27 15:22:14,536 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 378 predicate places. [2024-01-27 15:22:14,536 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 405 transitions, 6287 flow [2024-01-27 15:22:14,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:14,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:14,537 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:14,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-01-27 15:22:14,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:14,749 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:14,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash -804230342, now seen corresponding path program 73 times [2024-01-27 15:22:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:14,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101176231] [2024-01-27 15:22:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:14,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101176231] [2024-01-27 15:22:15,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101176231] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080883246] [2024-01-27 15:22:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:22:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:15,237 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:15,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-01-27 15:22:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:15,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:22:15,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:15,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:15,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-27 15:22:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:15,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:16,053 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:22:16,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:22:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:16,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080883246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:16,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:16,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-27 15:22:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412736725] [2024-01-27 15:22:16,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:16,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:22:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:22:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:22:16,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:16,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 405 transitions, 6287 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 15:22:16,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:16,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:16,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:17,296 INFO L124 PetriNetUnfolderBase]: 1512/2876 cut-off events. [2024-01-27 15:22:17,296 INFO L125 PetriNetUnfolderBase]: For 130800/130800 co-relation queries the response was YES. [2024-01-27 15:22:17,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28613 conditions, 2876 events. 1512/2876 cut-off events. For 130800/130800 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18909 event pairs, 428 based on Foata normal form. 1/2875 useless extension candidates. Maximal degree in co-relation 28449. Up to 2327 conditions per place. [2024-01-27 15:22:17,324 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 332 selfloop transitions, 91 changer transitions 6/430 dead transitions. [2024-01-27 15:22:17,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 430 transitions, 7377 flow [2024-01-27 15:22:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:22:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:22:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2024-01-27 15:22:17,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33229813664596275 [2024-01-27 15:22:17,325 INFO L175 Difference]: Start difference. First operand has 401 places, 405 transitions, 6287 flow. Second operand 14 states and 107 transitions. [2024-01-27 15:22:17,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 430 transitions, 7377 flow [2024-01-27 15:22:17,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 430 transitions, 7181 flow, removed 50 selfloop flow, removed 19 redundant places. [2024-01-27 15:22:17,841 INFO L231 Difference]: Finished difference. Result has 396 places, 405 transitions, 6325 flow [2024-01-27 15:22:17,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6325, PETRI_PLACES=396, PETRI_TRANSITIONS=405} [2024-01-27 15:22:17,842 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2024-01-27 15:22:17,842 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 405 transitions, 6325 flow [2024-01-27 15:22:17,842 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 15:22:17,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:17,842 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:17,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:18,054 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:18,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1003560740, now seen corresponding path program 74 times [2024-01-27 15:22:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:18,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651400217] [2024-01-27 15:22:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651400217] [2024-01-27 15:22:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651400217] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428177278] [2024-01-27 15:22:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:22:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:18,634 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:18,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-01-27 15:22:19,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:22:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:19,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:22:19,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:19,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:19,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:22:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:22:19,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:19,454 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-27 15:22:19,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-27 15:22:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:19,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428177278] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:19,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:19,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-01-27 15:22:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746212412] [2024-01-27 15:22:19,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:19,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:22:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:22:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:22:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 405 transitions, 6325 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:19,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:19,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:19,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:20,938 INFO L124 PetriNetUnfolderBase]: 1514/2885 cut-off events. [2024-01-27 15:22:20,939 INFO L125 PetriNetUnfolderBase]: For 131755/131755 co-relation queries the response was YES. [2024-01-27 15:22:20,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 2885 events. 1514/2885 cut-off events. For 131755/131755 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19062 event pairs, 492 based on Foata normal form. 2/2885 useless extension candidates. Maximal degree in co-relation 28688. Up to 2560 conditions per place. [2024-01-27 15:22:20,973 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 386 selfloop transitions, 61 changer transitions 5/453 dead transitions. [2024-01-27 15:22:20,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 453 transitions, 7804 flow [2024-01-27 15:22:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:22:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:22:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2024-01-27 15:22:20,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33747412008281574 [2024-01-27 15:22:20,976 INFO L175 Difference]: Start difference. First operand has 396 places, 405 transitions, 6325 flow. Second operand 21 states and 163 transitions. [2024-01-27 15:22:20,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 453 transitions, 7804 flow [2024-01-27 15:22:21,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 453 transitions, 7582 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-01-27 15:22:21,520 INFO L231 Difference]: Finished difference. Result has 406 places, 406 transitions, 6336 flow [2024-01-27 15:22:21,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6103, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6336, PETRI_PLACES=406, PETRI_TRANSITIONS=406} [2024-01-27 15:22:21,521 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 383 predicate places. [2024-01-27 15:22:21,521 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 406 transitions, 6336 flow [2024-01-27 15:22:21,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:21,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:21,521 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:21,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:21,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:21,734 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:21,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash -548684270, now seen corresponding path program 75 times [2024-01-27 15:22:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:21,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239576641] [2024-01-27 15:22:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:21,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:22,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239576641] [2024-01-27 15:22:22,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239576641] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443346512] [2024-01-27 15:22:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:22:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:22,319 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:22,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-01-27 15:22:22,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:22:22,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:22,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:22:22,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:22,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:22,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:22:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:22,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:23,098 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:22:23,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:22:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:23,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443346512] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:23,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:23,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-01-27 15:22:23,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115493175] [2024-01-27 15:22:23,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:23,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:22:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:22:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:22:23,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:23,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 406 transitions, 6336 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:23,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:23,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:23,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:24,280 INFO L124 PetriNetUnfolderBase]: 1524/2910 cut-off events. [2024-01-27 15:22:24,280 INFO L125 PetriNetUnfolderBase]: For 134181/134181 co-relation queries the response was YES. [2024-01-27 15:22:24,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29248 conditions, 2910 events. 1524/2910 cut-off events. For 134181/134181 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19307 event pairs, 456 based on Foata normal form. 4/2912 useless extension candidates. Maximal degree in co-relation 29082. Up to 1389 conditions per place. [2024-01-27 15:22:24,321 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 301 selfloop transitions, 141 changer transitions 2/445 dead transitions. [2024-01-27 15:22:24,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 445 transitions, 7891 flow [2024-01-27 15:22:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:22:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:22:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-01-27 15:22:24,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42292490118577075 [2024-01-27 15:22:24,322 INFO L175 Difference]: Start difference. First operand has 406 places, 406 transitions, 6336 flow. Second operand 11 states and 107 transitions. [2024-01-27 15:22:24,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 445 transitions, 7891 flow [2024-01-27 15:22:24,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 445 transitions, 7758 flow, removed 28 selfloop flow, removed 17 redundant places. [2024-01-27 15:22:24,942 INFO L231 Difference]: Finished difference. Result has 400 places, 407 transitions, 6545 flow [2024-01-27 15:22:24,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6545, PETRI_PLACES=400, PETRI_TRANSITIONS=407} [2024-01-27 15:22:24,942 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 377 predicate places. [2024-01-27 15:22:24,942 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 407 transitions, 6545 flow [2024-01-27 15:22:24,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:24,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:24,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:24,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-01-27 15:22:25,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2024-01-27 15:22:25,155 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:25,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -452731671, now seen corresponding path program 76 times [2024-01-27 15:22:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887637326] [2024-01-27 15:22:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:22:25,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:25,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887637326] [2024-01-27 15:22:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887637326] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:25,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546854480] [2024-01-27 15:22:25,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:22:25,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:25,859 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:25,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-01-27 15:22:26,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:22:26,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:26,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:22:26,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:26,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:26,451 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:22:26,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:22:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:26,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546854480] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:26,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:26,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-01-27 15:22:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139101548] [2024-01-27 15:22:26,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:26,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:22:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:22:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:22:26,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 407 transitions, 6545 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 15:22:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:27,739 INFO L124 PetriNetUnfolderBase]: 1564/2980 cut-off events. [2024-01-27 15:22:27,739 INFO L125 PetriNetUnfolderBase]: For 138610/138610 co-relation queries the response was YES. [2024-01-27 15:22:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30358 conditions, 2980 events. 1564/2980 cut-off events. For 138610/138610 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19800 event pairs, 290 based on Foata normal form. 6/2984 useless extension candidates. Maximal degree in co-relation 30191. Up to 1333 conditions per place. [2024-01-27 15:22:27,768 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 293 selfloop transitions, 158 changer transitions 1/453 dead transitions. [2024-01-27 15:22:27,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 453 transitions, 8271 flow [2024-01-27 15:22:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:22:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:22:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 134 transitions. [2024-01-27 15:22:27,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32367149758454106 [2024-01-27 15:22:27,769 INFO L175 Difference]: Start difference. First operand has 400 places, 407 transitions, 6545 flow. Second operand 18 states and 134 transitions. [2024-01-27 15:22:27,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 453 transitions, 8271 flow [2024-01-27 15:22:28,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 453 transitions, 8073 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-01-27 15:22:28,378 INFO L231 Difference]: Finished difference. Result has 412 places, 412 transitions, 6828 flow [2024-01-27 15:22:28,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6347, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6828, PETRI_PLACES=412, PETRI_TRANSITIONS=412} [2024-01-27 15:22:28,379 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 389 predicate places. [2024-01-27 15:22:28,379 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 412 transitions, 6828 flow [2024-01-27 15:22:28,379 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 15:22:28,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:28,380 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:28,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:28,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:28,583 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:28,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1306168710, now seen corresponding path program 77 times [2024-01-27 15:22:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:28,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846790740] [2024-01-27 15:22:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846790740] [2024-01-27 15:22:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846790740] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325317510] [2024-01-27 15:22:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:22:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:29,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:29,754 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:29,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-01-27 15:22:30,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:22:30,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:30,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:22:30,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:30,460 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:22:30,460 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 26 treesize of output 14 [2024-01-27 15:22:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:30,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:30,675 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:22:30,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:22:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325317510] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:30,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:30,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 38 [2024-01-27 15:22:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115069927] [2024-01-27 15:22:30,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:30,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:22:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:22:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:22:30,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:30,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 412 transitions, 6828 flow. Second operand has 38 states, 38 states have (on average 4.7368421052631575) internal successors, (180), 38 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:30,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:30,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:30,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:32,285 INFO L124 PetriNetUnfolderBase]: 1572/3005 cut-off events. [2024-01-27 15:22:32,286 INFO L125 PetriNetUnfolderBase]: For 144901/144901 co-relation queries the response was YES. [2024-01-27 15:22:32,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31124 conditions, 3005 events. 1572/3005 cut-off events. For 144901/144901 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20207 event pairs, 234 based on Foata normal form. 4/3007 useless extension candidates. Maximal degree in co-relation 30953. Up to 1451 conditions per place. [2024-01-27 15:22:32,325 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 293 selfloop transitions, 173 changer transitions 26/493 dead transitions. [2024-01-27 15:22:32,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 493 transitions, 9033 flow [2024-01-27 15:22:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:22:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:22:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 158 transitions. [2024-01-27 15:22:32,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29867674858223064 [2024-01-27 15:22:32,327 INFO L175 Difference]: Start difference. First operand has 412 places, 412 transitions, 6828 flow. Second operand 23 states and 158 transitions. [2024-01-27 15:22:32,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 493 transitions, 9033 flow [2024-01-27 15:22:33,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 493 transitions, 8753 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-01-27 15:22:33,103 INFO L231 Difference]: Finished difference. Result has 424 places, 411 transitions, 6869 flow [2024-01-27 15:22:33,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6869, PETRI_PLACES=424, PETRI_TRANSITIONS=411} [2024-01-27 15:22:33,104 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 401 predicate places. [2024-01-27 15:22:33,104 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 411 transitions, 6869 flow [2024-01-27 15:22:33,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7368421052631575) internal successors, (180), 38 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:33,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:33,104 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:33,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:33,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:33,317 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:33,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:33,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1352671783, now seen corresponding path program 78 times [2024-01-27 15:22:33,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:33,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364510273] [2024-01-27 15:22:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:33,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:22:34,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364510273] [2024-01-27 15:22:34,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364510273] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436043151] [2024-01-27 15:22:34,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:22:34,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:34,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:34,051 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-01-27 15:22:34,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:22:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:34,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:22:34,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:34,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:34,820 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:22:34,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:22:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:34,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436043151] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:34,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:34,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-01-27 15:22:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976095230] [2024-01-27 15:22:34,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:34,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:22:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:22:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:22:34,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:34,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 411 transitions, 6869 flow. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:34,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:34,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:34,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:36,070 INFO L124 PetriNetUnfolderBase]: 1576/3004 cut-off events. [2024-01-27 15:22:36,071 INFO L125 PetriNetUnfolderBase]: For 147060/147060 co-relation queries the response was YES. [2024-01-27 15:22:36,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31424 conditions, 3004 events. 1576/3004 cut-off events. For 147060/147060 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19985 event pairs, 282 based on Foata normal form. 6/3008 useless extension candidates. Maximal degree in co-relation 31249. Up to 1343 conditions per place. [2024-01-27 15:22:36,107 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 295 selfloop transitions, 164 changer transitions 1/461 dead transitions. [2024-01-27 15:22:36,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 461 transitions, 8593 flow [2024-01-27 15:22:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:22:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:22:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 152 transitions. [2024-01-27 15:22:36,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33043478260869563 [2024-01-27 15:22:36,109 INFO L175 Difference]: Start difference. First operand has 424 places, 411 transitions, 6869 flow. Second operand 20 states and 152 transitions. [2024-01-27 15:22:36,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 461 transitions, 8593 flow [2024-01-27 15:22:36,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 461 transitions, 8260 flow, removed 3 selfloop flow, removed 21 redundant places. [2024-01-27 15:22:36,905 INFO L231 Difference]: Finished difference. Result has 420 places, 413 transitions, 6949 flow [2024-01-27 15:22:36,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6949, PETRI_PLACES=420, PETRI_TRANSITIONS=413} [2024-01-27 15:22:36,905 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 397 predicate places. [2024-01-27 15:22:36,905 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 413 transitions, 6949 flow [2024-01-27 15:22:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:36,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:36,906 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:36,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-01-27 15:22:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-01-27 15:22:37,119 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:37,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash -559206557, now seen corresponding path program 79 times [2024-01-27 15:22:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:37,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450967053] [2024-01-27 15:22:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:38,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450967053] [2024-01-27 15:22:38,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450967053] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405003725] [2024-01-27 15:22:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:22:38,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:38,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:38,266 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:38,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-01-27 15:22:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:38,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:22:38,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:38,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:38,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:22:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:38,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:39,015 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:22:39,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:22:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:39,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405003725] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:39,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:39,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-01-27 15:22:39,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623953058] [2024-01-27 15:22:39,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:39,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:22:39,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:22:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:22:39,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:39,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 413 transitions, 6949 flow. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:39,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:39,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:39,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:40,615 INFO L124 PetriNetUnfolderBase]: 1588/3031 cut-off events. [2024-01-27 15:22:40,616 INFO L125 PetriNetUnfolderBase]: For 158108/158108 co-relation queries the response was YES. [2024-01-27 15:22:40,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32280 conditions, 3031 events. 1588/3031 cut-off events. For 158108/158108 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20249 event pairs, 276 based on Foata normal form. 4/3033 useless extension candidates. Maximal degree in co-relation 32108. Up to 1287 conditions per place. [2024-01-27 15:22:40,655 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 296 selfloop transitions, 173 changer transitions 7/477 dead transitions. [2024-01-27 15:22:40,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 477 transitions, 8929 flow [2024-01-27 15:22:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:22:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:22:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 181 transitions. [2024-01-27 15:22:40,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34215500945179583 [2024-01-27 15:22:40,657 INFO L175 Difference]: Start difference. First operand has 420 places, 413 transitions, 6949 flow. Second operand 23 states and 181 transitions. [2024-01-27 15:22:40,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 477 transitions, 8929 flow [2024-01-27 15:22:41,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 477 transitions, 8623 flow, removed 20 selfloop flow, removed 17 redundant places. [2024-01-27 15:22:41,481 INFO L231 Difference]: Finished difference. Result has 428 places, 415 transitions, 7125 flow [2024-01-27 15:22:41,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6643, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7125, PETRI_PLACES=428, PETRI_TRANSITIONS=415} [2024-01-27 15:22:41,481 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 405 predicate places. [2024-01-27 15:22:41,482 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 415 transitions, 7125 flow [2024-01-27 15:22:41,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:41,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:41,482 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:41,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:41,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:41,695 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:41,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1374594320, now seen corresponding path program 80 times [2024-01-27 15:22:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:41,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490050494] [2024-01-27 15:22:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:42,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:42,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490050494] [2024-01-27 15:22:42,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490050494] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:42,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141789974] [2024-01-27 15:22:42,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:22:42,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:42,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:42,322 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:42,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-01-27 15:22:42,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:22:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:42,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:22:42,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:42,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:42,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:22:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:22:42,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:43,131 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:22:43,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:22:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141789974] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:43,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:43,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 25 [2024-01-27 15:22:43,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528509768] [2024-01-27 15:22:43,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:43,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:22:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:22:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:22:43,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:43,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 415 transitions, 7125 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:43,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:43,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:43,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:44,697 INFO L124 PetriNetUnfolderBase]: 1581/3021 cut-off events. [2024-01-27 15:22:44,697 INFO L125 PetriNetUnfolderBase]: For 170201/170201 co-relation queries the response was YES. [2024-01-27 15:22:44,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32860 conditions, 3021 events. 1581/3021 cut-off events. For 170201/170201 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20237 event pairs, 500 based on Foata normal form. 4/3023 useless extension candidates. Maximal degree in co-relation 32686. Up to 1513 conditions per place. [2024-01-27 15:22:44,740 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 303 selfloop transitions, 145 changer transitions 5/454 dead transitions. [2024-01-27 15:22:44,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 454 transitions, 8631 flow [2024-01-27 15:22:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:22:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:22:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 116 transitions. [2024-01-27 15:22:44,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879598662207358 [2024-01-27 15:22:44,741 INFO L175 Difference]: Start difference. First operand has 428 places, 415 transitions, 7125 flow. Second operand 13 states and 116 transitions. [2024-01-27 15:22:44,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 454 transitions, 8631 flow [2024-01-27 15:22:45,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 454 transitions, 8104 flow, removed 65 selfloop flow, removed 20 redundant places. [2024-01-27 15:22:45,907 INFO L231 Difference]: Finished difference. Result has 419 places, 414 transitions, 6901 flow [2024-01-27 15:22:45,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6618, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6901, PETRI_PLACES=419, PETRI_TRANSITIONS=414} [2024-01-27 15:22:45,907 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 396 predicate places. [2024-01-27 15:22:45,908 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 414 transitions, 6901 flow [2024-01-27 15:22:45,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:45,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:45,908 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:45,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:46,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:46,120 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:46,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash 327959723, now seen corresponding path program 81 times [2024-01-27 15:22:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:46,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318651457] [2024-01-27 15:22:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:46,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:47,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:47,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318651457] [2024-01-27 15:22:47,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318651457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:47,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750050295] [2024-01-27 15:22:47,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:22:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:47,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:47,098 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:47,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-01-27 15:22:47,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:22:47,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:47,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:22:47,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:47,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:47,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:22:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:22:47,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:48,034 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:22:48,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:22:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750050295] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:48,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:48,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 10] total 39 [2024-01-27 15:22:48,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299584636] [2024-01-27 15:22:48,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:22:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:22:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2024-01-27 15:22:48,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:48,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 414 transitions, 6901 flow. Second operand has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:48,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:48,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:48,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:50,145 INFO L124 PetriNetUnfolderBase]: 1728/3295 cut-off events. [2024-01-27 15:22:50,145 INFO L125 PetriNetUnfolderBase]: For 174581/174581 co-relation queries the response was YES. [2024-01-27 15:22:50,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35304 conditions, 3295 events. 1728/3295 cut-off events. For 174581/174581 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22499 event pairs, 174 based on Foata normal form. 16/3309 useless extension candidates. Maximal degree in co-relation 35131. Up to 1321 conditions per place. [2024-01-27 15:22:50,189 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 313 selfloop transitions, 269 changer transitions 14/597 dead transitions. [2024-01-27 15:22:50,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 597 transitions, 11113 flow [2024-01-27 15:22:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:22:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:22:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 290 transitions. [2024-01-27 15:22:50,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3407755581668625 [2024-01-27 15:22:50,191 INFO L175 Difference]: Start difference. First operand has 419 places, 414 transitions, 6901 flow. Second operand 37 states and 290 transitions. [2024-01-27 15:22:50,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 597 transitions, 11113 flow [2024-01-27 15:22:51,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 597 transitions, 10775 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-01-27 15:22:51,081 INFO L231 Difference]: Finished difference. Result has 451 places, 480 transitions, 9037 flow [2024-01-27 15:22:51,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9037, PETRI_PLACES=451, PETRI_TRANSITIONS=480} [2024-01-27 15:22:51,082 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 428 predicate places. [2024-01-27 15:22:51,082 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 480 transitions, 9037 flow [2024-01-27 15:22:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:51,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:51,083 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:51,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:51,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-01-27 15:22:51,296 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:51,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:51,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1516515229, now seen corresponding path program 82 times [2024-01-27 15:22:51,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:51,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294499740] [2024-01-27 15:22:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:51,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:51,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294499740] [2024-01-27 15:22:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294499740] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848596641] [2024-01-27 15:22:51,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:22:51,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:51,806 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:51,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-01-27 15:22:52,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:22:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:52,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:22:52,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:52,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:52,582 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:22:52,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:22:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848596641] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:52,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:52,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-27 15:22:52,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595312479] [2024-01-27 15:22:52,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:52,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:22:52,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:22:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:22:52,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:52,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 480 transitions, 9037 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:52,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:52,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:53,910 INFO L124 PetriNetUnfolderBase]: 1759/3330 cut-off events. [2024-01-27 15:22:53,910 INFO L125 PetriNetUnfolderBase]: For 215535/215535 co-relation queries the response was YES. [2024-01-27 15:22:53,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38745 conditions, 3330 events. 1759/3330 cut-off events. For 215535/215535 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22532 event pairs, 280 based on Foata normal form. 6/3334 useless extension candidates. Maximal degree in co-relation 38563. Up to 1474 conditions per place. [2024-01-27 15:22:53,955 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 378 selfloop transitions, 161 changer transitions 0/540 dead transitions. [2024-01-27 15:22:53,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 540 transitions, 11064 flow [2024-01-27 15:22:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:22:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:22:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 143 transitions. [2024-01-27 15:22:53,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38858695652173914 [2024-01-27 15:22:53,956 INFO L175 Difference]: Start difference. First operand has 451 places, 480 transitions, 9037 flow. Second operand 16 states and 143 transitions. [2024-01-27 15:22:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 540 transitions, 11064 flow [2024-01-27 15:22:55,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 540 transitions, 9992 flow, removed 401 selfloop flow, removed 23 redundant places. [2024-01-27 15:22:55,214 INFO L231 Difference]: Finished difference. Result has 443 places, 487 transitions, 8521 flow [2024-01-27 15:22:55,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8034, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8521, PETRI_PLACES=443, PETRI_TRANSITIONS=487} [2024-01-27 15:22:55,215 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 420 predicate places. [2024-01-27 15:22:55,215 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 487 transitions, 8521 flow [2024-01-27 15:22:55,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:55,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:55,215 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:55,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:55,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:55,422 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:22:55,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1234736358, now seen corresponding path program 83 times [2024-01-27 15:22:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110060176] [2024-01-27 15:22:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:55,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110060176] [2024-01-27 15:22:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110060176] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271722979] [2024-01-27 15:22:56,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:22:56,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:56,473 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:56,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-01-27 15:22:56,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:22:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:56,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:22:56,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:57,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:57,217 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:22:57,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:22:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:22:57,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271722979] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:57,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:57,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 38 [2024-01-27 15:22:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391356576] [2024-01-27 15:22:57,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:57,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:22:57,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:22:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:22:57,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:22:57,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 487 transitions, 8521 flow. Second operand has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:57,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:57,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:22:57,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:58,918 INFO L124 PetriNetUnfolderBase]: 1749/3309 cut-off events. [2024-01-27 15:22:58,918 INFO L125 PetriNetUnfolderBase]: For 197633/197633 co-relation queries the response was YES. [2024-01-27 15:22:58,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36325 conditions, 3309 events. 1749/3309 cut-off events. For 197633/197633 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22338 event pairs, 542 based on Foata normal form. 4/3311 useless extension candidates. Maximal degree in co-relation 36144. Up to 1698 conditions per place. [2024-01-27 15:22:58,959 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 345 selfloop transitions, 156 changer transitions 12/514 dead transitions. [2024-01-27 15:22:58,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 514 transitions, 9884 flow [2024-01-27 15:22:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:22:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:22:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 146 transitions. [2024-01-27 15:22:58,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2885375494071146 [2024-01-27 15:22:58,960 INFO L175 Difference]: Start difference. First operand has 443 places, 487 transitions, 8521 flow. Second operand 22 states and 146 transitions. [2024-01-27 15:22:58,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 514 transitions, 9884 flow [2024-01-27 15:22:59,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 514 transitions, 9541 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-01-27 15:22:59,842 INFO L231 Difference]: Finished difference. Result has 450 places, 483 transitions, 8432 flow [2024-01-27 15:22:59,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8167, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8432, PETRI_PLACES=450, PETRI_TRANSITIONS=483} [2024-01-27 15:22:59,843 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 427 predicate places. [2024-01-27 15:22:59,843 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 483 transitions, 8432 flow [2024-01-27 15:22:59,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:59,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:59,844 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:59,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:00,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:00,056 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:00,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:00,057 INFO L85 PathProgramCache]: Analyzing trace with hash 33136807, now seen corresponding path program 84 times [2024-01-27 15:23:00,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:00,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108457558] [2024-01-27 15:23:00,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:00,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:23:01,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:01,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108457558] [2024-01-27 15:23:01,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108457558] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:01,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920556216] [2024-01-27 15:23:01,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:23:01,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:01,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:01,083 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:01,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-01-27 15:23:01,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:23:01,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:01,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-27 15:23:01,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:01,761 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:23:01,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:23:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:01,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:02,195 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:23:02,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:23:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:02,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920556216] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:02,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:02,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 11] total 38 [2024-01-27 15:23:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348676984] [2024-01-27 15:23:02,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:23:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:23:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:23:02,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:02,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 483 transitions, 8432 flow. Second operand has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:02,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:02,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:02,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:04,286 INFO L124 PetriNetUnfolderBase]: 1772/3346 cut-off events. [2024-01-27 15:23:04,287 INFO L125 PetriNetUnfolderBase]: For 205346/205346 co-relation queries the response was YES. [2024-01-27 15:23:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36776 conditions, 3346 events. 1772/3346 cut-off events. For 205346/205346 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22620 event pairs, 718 based on Foata normal form. 10/3354 useless extension candidates. Maximal degree in co-relation 36593. Up to 2852 conditions per place. [2024-01-27 15:23:04,335 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 414 selfloop transitions, 120 changer transitions 0/535 dead transitions. [2024-01-27 15:23:04,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 535 transitions, 10132 flow [2024-01-27 15:23:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:23:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:23:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 199 transitions. [2024-01-27 15:23:04,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2983508245877061 [2024-01-27 15:23:04,336 INFO L175 Difference]: Start difference. First operand has 450 places, 483 transitions, 8432 flow. Second operand 29 states and 199 transitions. [2024-01-27 15:23:04,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 535 transitions, 10132 flow [2024-01-27 15:23:05,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 535 transitions, 9820 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-01-27 15:23:05,425 INFO L231 Difference]: Finished difference. Result has 459 places, 491 transitions, 8636 flow [2024-01-27 15:23:05,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8120, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8636, PETRI_PLACES=459, PETRI_TRANSITIONS=491} [2024-01-27 15:23:05,425 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 436 predicate places. [2024-01-27 15:23:05,425 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 491 transitions, 8636 flow [2024-01-27 15:23:05,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:05,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:05,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:05,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:05,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:05,636 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:05,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1763273912, now seen corresponding path program 85 times [2024-01-27 15:23:05,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:05,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427870929] [2024-01-27 15:23:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:05,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:06,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427870929] [2024-01-27 15:23:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427870929] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941575417] [2024-01-27 15:23:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:23:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:06,173 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:06,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-01-27 15:23:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:06,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:23:06,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:06,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:06,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:23:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:06,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:06,896 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:23:06,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:23:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:06,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941575417] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:06,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:06,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-01-27 15:23:06,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704177352] [2024-01-27 15:23:06,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:06,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:23:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:23:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:23:06,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:06,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 491 transitions, 8636 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:06,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:06,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:06,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:08,324 INFO L124 PetriNetUnfolderBase]: 1797/3401 cut-off events. [2024-01-27 15:23:08,324 INFO L125 PetriNetUnfolderBase]: For 227102/227102 co-relation queries the response was YES. [2024-01-27 15:23:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38282 conditions, 3401 events. 1797/3401 cut-off events. For 227102/227102 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23149 event pairs, 733 based on Foata normal form. 4/3403 useless extension candidates. Maximal degree in co-relation 38095. Up to 2901 conditions per place. [2024-01-27 15:23:08,366 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 429 selfloop transitions, 91 changer transitions 0/521 dead transitions. [2024-01-27 15:23:08,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 521 transitions, 10208 flow [2024-01-27 15:23:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:23:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:23:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-01-27 15:23:08,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.383399209486166 [2024-01-27 15:23:08,368 INFO L175 Difference]: Start difference. First operand has 459 places, 491 transitions, 8636 flow. Second operand 11 states and 97 transitions. [2024-01-27 15:23:08,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 521 transitions, 10208 flow [2024-01-27 15:23:09,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 521 transitions, 9864 flow, removed 81 selfloop flow, removed 24 redundant places. [2024-01-27 15:23:09,363 INFO L231 Difference]: Finished difference. Result has 446 places, 492 transitions, 8541 flow [2024-01-27 15:23:09,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8292, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8541, PETRI_PLACES=446, PETRI_TRANSITIONS=492} [2024-01-27 15:23:09,363 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 423 predicate places. [2024-01-27 15:23:09,363 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 492 transitions, 8541 flow [2024-01-27 15:23:09,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:09,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:09,364 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:09,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-01-27 15:23:09,576 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:09,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash -248629662, now seen corresponding path program 86 times [2024-01-27 15:23:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369986697] [2024-01-27 15:23:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369986697] [2024-01-27 15:23:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369986697] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317438725] [2024-01-27 15:23:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:23:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:09,999 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:10,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-01-27 15:23:10,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:23:10,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:10,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:23:10,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:23:10,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:10,640 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:23:10,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:23:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317438725] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:10,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-01-27 15:23:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234440951] [2024-01-27 15:23:10,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:23:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:23:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:23:10,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:10,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 492 transitions, 8541 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 15:23:10,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:10,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:10,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:12,335 INFO L124 PetriNetUnfolderBase]: 1845/3491 cut-off events. [2024-01-27 15:23:12,335 INFO L125 PetriNetUnfolderBase]: For 242019/242019 co-relation queries the response was YES. [2024-01-27 15:23:12,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39760 conditions, 3491 events. 1845/3491 cut-off events. For 242019/242019 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23834 event pairs, 722 based on Foata normal form. 8/3497 useless extension candidates. Maximal degree in co-relation 39575. Up to 2864 conditions per place. [2024-01-27 15:23:12,382 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 440 selfloop transitions, 115 changer transitions 6/562 dead transitions. [2024-01-27 15:23:12,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 562 transitions, 11352 flow [2024-01-27 15:23:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:23:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:23:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 176 transitions. [2024-01-27 15:23:12,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-27 15:23:12,383 INFO L175 Difference]: Start difference. First operand has 446 places, 492 transitions, 8541 flow. Second operand 22 states and 176 transitions. [2024-01-27 15:23:12,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 562 transitions, 11352 flow [2024-01-27 15:23:13,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 562 transitions, 11153 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-01-27 15:23:13,335 INFO L231 Difference]: Finished difference. Result has 461 places, 498 transitions, 8866 flow [2024-01-27 15:23:13,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8342, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8866, PETRI_PLACES=461, PETRI_TRANSITIONS=498} [2024-01-27 15:23:13,335 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 438 predicate places. [2024-01-27 15:23:13,335 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 498 transitions, 8866 flow [2024-01-27 15:23:13,336 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 15:23:13,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:13,336 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:13,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:13,548 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:13,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash -561525818, now seen corresponding path program 87 times [2024-01-27 15:23:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:13,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839401116] [2024-01-27 15:23:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:23:14,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:14,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839401116] [2024-01-27 15:23:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839401116] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:14,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616674438] [2024-01-27 15:23:14,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:23:14,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:14,240 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-01-27 15:23:14,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:23:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:14,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-27 15:23:14,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:14,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:14,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:23:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:23:14,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:15,200 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:23:15,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:23:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:15,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616674438] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:15,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:15,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 34 [2024-01-27 15:23:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860471154] [2024-01-27 15:23:15,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:23:15,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:23:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:23:15,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:15,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 498 transitions, 8866 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:15,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:15,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:15,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:17,802 INFO L124 PetriNetUnfolderBase]: 1915/3665 cut-off events. [2024-01-27 15:23:17,802 INFO L125 PetriNetUnfolderBase]: For 288213/288213 co-relation queries the response was YES. [2024-01-27 15:23:17,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43648 conditions, 3665 events. 1915/3665 cut-off events. For 288213/288213 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25487 event pairs, 374 based on Foata normal form. 16/3679 useless extension candidates. Maximal degree in co-relation 43460. Up to 2804 conditions per place. [2024-01-27 15:23:17,854 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 455 selfloop transitions, 152 changer transitions 18/626 dead transitions. [2024-01-27 15:23:17,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 626 transitions, 13567 flow [2024-01-27 15:23:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:23:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:23:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 306 transitions. [2024-01-27 15:23:17,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411371237458194 [2024-01-27 15:23:17,856 INFO L175 Difference]: Start difference. First operand has 461 places, 498 transitions, 8866 flow. Second operand 39 states and 306 transitions. [2024-01-27 15:23:17,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 626 transitions, 13567 flow [2024-01-27 15:23:19,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 626 transitions, 13081 flow, removed 156 selfloop flow, removed 17 redundant places. [2024-01-27 15:23:19,133 INFO L231 Difference]: Finished difference. Result has 493 places, 518 transitions, 9872 flow [2024-01-27 15:23:19,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9872, PETRI_PLACES=493, PETRI_TRANSITIONS=518} [2024-01-27 15:23:19,133 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 470 predicate places. [2024-01-27 15:23:19,133 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 518 transitions, 9872 flow [2024-01-27 15:23:19,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:19,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:19,134 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:19,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:19,347 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:19,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1959414369, now seen corresponding path program 88 times [2024-01-27 15:23:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:19,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647432084] [2024-01-27 15:23:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:23:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647432084] [2024-01-27 15:23:20,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647432084] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777076610] [2024-01-27 15:23:20,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:23:20,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:20,051 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-01-27 15:23:20,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:23:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:20,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:23:20,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:20,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:20,740 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:23:20,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:23:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777076610] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:20,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:20,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-01-27 15:23:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846480495] [2024-01-27 15:23:20,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:20,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:23:20,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:23:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:23:20,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:20,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 518 transitions, 9872 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:20,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:20,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:20,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:22,397 INFO L124 PetriNetUnfolderBase]: 1911/3647 cut-off events. [2024-01-27 15:23:22,398 INFO L125 PetriNetUnfolderBase]: For 319499/319499 co-relation queries the response was YES. [2024-01-27 15:23:22,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44853 conditions, 3647 events. 1911/3647 cut-off events. For 319499/319499 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25278 event pairs, 783 based on Foata normal form. 6/3651 useless extension candidates. Maximal degree in co-relation 44653. Up to 3139 conditions per place. [2024-01-27 15:23:22,457 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 442 selfloop transitions, 111 changer transitions 0/554 dead transitions. [2024-01-27 15:23:22,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 554 transitions, 11487 flow [2024-01-27 15:23:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:23:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:23:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2024-01-27 15:23:22,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3309178743961353 [2024-01-27 15:23:22,458 INFO L175 Difference]: Start difference. First operand has 493 places, 518 transitions, 9872 flow. Second operand 18 states and 137 transitions. [2024-01-27 15:23:22,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 554 transitions, 11487 flow [2024-01-27 15:23:24,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 554 transitions, 10451 flow, removed 402 selfloop flow, removed 24 redundant places. [2024-01-27 15:23:24,157 INFO L231 Difference]: Finished difference. Result has 485 places, 520 transitions, 9155 flow [2024-01-27 15:23:24,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9155, PETRI_PLACES=485, PETRI_TRANSITIONS=520} [2024-01-27 15:23:24,158 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 462 predicate places. [2024-01-27 15:23:24,158 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 520 transitions, 9155 flow [2024-01-27 15:23:24,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:24,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:24,159 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:24,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-01-27 15:23:24,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:24,372 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:24,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1671372062, now seen corresponding path program 89 times [2024-01-27 15:23:24,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:24,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195221156] [2024-01-27 15:23:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:24,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195221156] [2024-01-27 15:23:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195221156] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056023208] [2024-01-27 15:23:24,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:23:24,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:24,853 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:24,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-01-27 15:23:25,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:23:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:25,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:23:25,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:25,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:25,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-27 15:23:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:25,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:25,609 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:23:25,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:23:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:25,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056023208] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:25,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:25,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:23:25,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279442094] [2024-01-27 15:23:25,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:25,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:23:25,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:25,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:23:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:23:25,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:25,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 520 transitions, 9155 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:25,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:27,631 INFO L124 PetriNetUnfolderBase]: 2036/3926 cut-off events. [2024-01-27 15:23:27,631 INFO L125 PetriNetUnfolderBase]: For 345838/345838 co-relation queries the response was YES. [2024-01-27 15:23:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47367 conditions, 3926 events. 2036/3926 cut-off events. For 345838/345838 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27883 event pairs, 819 based on Foata normal form. 12/3936 useless extension candidates. Maximal degree in co-relation 47169. Up to 3235 conditions per place. [2024-01-27 15:23:27,678 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 504 selfloop transitions, 108 changer transitions 1/614 dead transitions. [2024-01-27 15:23:27,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 614 transitions, 12422 flow [2024-01-27 15:23:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:23:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:23:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 188 transitions. [2024-01-27 15:23:27,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38923395445134573 [2024-01-27 15:23:27,680 INFO L175 Difference]: Start difference. First operand has 485 places, 520 transitions, 9155 flow. Second operand 21 states and 188 transitions. [2024-01-27 15:23:27,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 614 transitions, 12422 flow [2024-01-27 15:23:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 614 transitions, 12120 flow, removed 23 selfloop flow, removed 17 redundant places. [2024-01-27 15:23:29,143 INFO L231 Difference]: Finished difference. Result has 494 places, 538 transitions, 9614 flow [2024-01-27 15:23:29,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8853, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9614, PETRI_PLACES=494, PETRI_TRANSITIONS=538} [2024-01-27 15:23:29,144 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 471 predicate places. [2024-01-27 15:23:29,144 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 538 transitions, 9614 flow [2024-01-27 15:23:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:29,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:29,144 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:29,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:29,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:29,353 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:29,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash 534360963, now seen corresponding path program 90 times [2024-01-27 15:23:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731493007] [2024-01-27 15:23:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:29,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:29,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731493007] [2024-01-27 15:23:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731493007] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173014790] [2024-01-27 15:23:29,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:23:29,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:29,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:29,881 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:29,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-01-27 15:23:30,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:23:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:30,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:23:30,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:30,610 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:23:30,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:23:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:30,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:30,719 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:23:30,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:23:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:30,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173014790] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:30,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:30,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-01-27 15:23:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014522276] [2024-01-27 15:23:30,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:30,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:23:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:23:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:23:30,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:30,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 538 transitions, 9614 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:30,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:30,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:30,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:32,523 INFO L124 PetriNetUnfolderBase]: 2054/3948 cut-off events. [2024-01-27 15:23:32,523 INFO L125 PetriNetUnfolderBase]: For 378801/378801 co-relation queries the response was YES. [2024-01-27 15:23:32,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48597 conditions, 3948 events. 2054/3948 cut-off events. For 378801/378801 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28013 event pairs, 806 based on Foata normal form. 26/3972 useless extension candidates. Maximal degree in co-relation 48395. Up to 3217 conditions per place. [2024-01-27 15:23:32,580 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 471 selfloop transitions, 126 changer transitions 0/598 dead transitions. [2024-01-27 15:23:32,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 598 transitions, 11963 flow [2024-01-27 15:23:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:23:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:23:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 163 transitions. [2024-01-27 15:23:32,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37299771167048057 [2024-01-27 15:23:32,581 INFO L175 Difference]: Start difference. First operand has 494 places, 538 transitions, 9614 flow. Second operand 19 states and 163 transitions. [2024-01-27 15:23:32,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 598 transitions, 11963 flow [2024-01-27 15:23:34,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 598 transitions, 11638 flow, removed 107 selfloop flow, removed 11 redundant places. [2024-01-27 15:23:34,191 INFO L231 Difference]: Finished difference. Result has 502 places, 540 transitions, 9739 flow [2024-01-27 15:23:34,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9282, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9739, PETRI_PLACES=502, PETRI_TRANSITIONS=540} [2024-01-27 15:23:34,192 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 479 predicate places. [2024-01-27 15:23:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 540 transitions, 9739 flow [2024-01-27 15:23:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:34,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:34,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:34,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-01-27 15:23:34,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-01-27 15:23:34,406 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:34,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1644636329, now seen corresponding path program 91 times [2024-01-27 15:23:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:34,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742965593] [2024-01-27 15:23:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:34,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:23:35,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742965593] [2024-01-27 15:23:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742965593] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14730865] [2024-01-27 15:23:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:23:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:35,156 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:35,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-01-27 15:23:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:35,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:23:35,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:35,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:35,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:23:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:35,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:35,911 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:23:35,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:23:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:35,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14730865] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:35,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:35,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-01-27 15:23:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368820708] [2024-01-27 15:23:35,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:23:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:23:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:23:35,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:35,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 540 transitions, 9739 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:35,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:35,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:35,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:37,889 INFO L124 PetriNetUnfolderBase]: 2088/4015 cut-off events. [2024-01-27 15:23:37,889 INFO L125 PetriNetUnfolderBase]: For 395355/395355 co-relation queries the response was YES. [2024-01-27 15:23:37,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50108 conditions, 4015 events. 2088/4015 cut-off events. For 395355/395355 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28630 event pairs, 859 based on Foata normal form. 6/4019 useless extension candidates. Maximal degree in co-relation 49902. Up to 3406 conditions per place. [2024-01-27 15:23:37,953 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 465 selfloop transitions, 124 changer transitions 0/590 dead transitions. [2024-01-27 15:23:37,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 590 transitions, 11716 flow [2024-01-27 15:23:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:23:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:23:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2024-01-27 15:23:37,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2024-01-27 15:23:37,955 INFO L175 Difference]: Start difference. First operand has 502 places, 540 transitions, 9739 flow. Second operand 21 states and 162 transitions. [2024-01-27 15:23:37,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 590 transitions, 11716 flow [2024-01-27 15:23:40,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 590 transitions, 11439 flow, removed 59 selfloop flow, removed 14 redundant places. [2024-01-27 15:23:40,108 INFO L231 Difference]: Finished difference. Result has 510 places, 545 transitions, 9901 flow [2024-01-27 15:23:40,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9462, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9901, PETRI_PLACES=510, PETRI_TRANSITIONS=545} [2024-01-27 15:23:40,110 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 487 predicate places. [2024-01-27 15:23:40,111 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 545 transitions, 9901 flow [2024-01-27 15:23:40,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:40,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:40,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:40,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:40,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-01-27 15:23:40,317 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:40,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1808997615, now seen corresponding path program 92 times [2024-01-27 15:23:40,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021773104] [2024-01-27 15:23:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021773104] [2024-01-27 15:23:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021773104] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555603250] [2024-01-27 15:23:40,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:23:40,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:40,865 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:40,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-01-27 15:23:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:23:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:41,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:23:41,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:41,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:41,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:23:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:23:41,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:41,585 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:23:41,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:23:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:41,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555603250] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:41,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:41,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 23 [2024-01-27 15:23:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280200322] [2024-01-27 15:23:41,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:41,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:23:41,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:23:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:23:41,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:41,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 545 transitions, 9901 flow. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:41,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:41,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:41,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:43,604 INFO L124 PetriNetUnfolderBase]: 2110/4054 cut-off events. [2024-01-27 15:23:43,604 INFO L125 PetriNetUnfolderBase]: For 432464/432464 co-relation queries the response was YES. [2024-01-27 15:23:43,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51099 conditions, 4054 events. 2110/4054 cut-off events. For 432464/432464 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28893 event pairs, 736 based on Foata normal form. 54/4106 useless extension candidates. Maximal degree in co-relation 50891. Up to 3113 conditions per place. [2024-01-27 15:23:43,670 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 486 selfloop transitions, 164 changer transitions 3/654 dead transitions. [2024-01-27 15:23:43,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 654 transitions, 13120 flow [2024-01-27 15:23:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:23:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:23:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 263 transitions. [2024-01-27 15:23:43,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688639551192146 [2024-01-27 15:23:43,671 INFO L175 Difference]: Start difference. First operand has 510 places, 545 transitions, 9901 flow. Second operand 31 states and 263 transitions. [2024-01-27 15:23:43,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 654 transitions, 13120 flow [2024-01-27 15:23:45,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 654 transitions, 12694 flow, removed 97 selfloop flow, removed 17 redundant places. [2024-01-27 15:23:45,785 INFO L231 Difference]: Finished difference. Result has 531 places, 558 transitions, 10464 flow [2024-01-27 15:23:45,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9377, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=10464, PETRI_PLACES=531, PETRI_TRANSITIONS=558} [2024-01-27 15:23:45,786 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 508 predicate places. [2024-01-27 15:23:45,786 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 558 transitions, 10464 flow [2024-01-27 15:23:45,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:45,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:45,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:45,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-01-27 15:23:46,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-01-27 15:23:46,001 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:46,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash -947448057, now seen corresponding path program 93 times [2024-01-27 15:23:46,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:46,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807713030] [2024-01-27 15:23:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:46,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:23:47,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:47,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807713030] [2024-01-27 15:23:47,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807713030] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:47,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975499612] [2024-01-27 15:23:47,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:23:47,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:47,475 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:47,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-01-27 15:23:47,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:23:47,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:47,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-27 15:23:47,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:48,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:48,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:23:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:23:48,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:48,410 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:23:48,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:23:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975499612] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:48,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 10] total 37 [2024-01-27 15:23:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672526541] [2024-01-27 15:23:48,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:48,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:23:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:23:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:23:48,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:48,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 558 transitions, 10464 flow. Second operand has 37 states, 37 states have (on average 4.621621621621622) internal successors, (171), 37 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:48,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:48,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:50,876 INFO L124 PetriNetUnfolderBase]: 2075/3984 cut-off events. [2024-01-27 15:23:50,876 INFO L125 PetriNetUnfolderBase]: For 467641/467641 co-relation queries the response was YES. [2024-01-27 15:23:50,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52319 conditions, 3984 events. 2075/3984 cut-off events. For 467641/467641 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28227 event pairs, 844 based on Foata normal form. 14/3996 useless extension candidates. Maximal degree in co-relation 52103. Up to 3385 conditions per place. [2024-01-27 15:23:50,946 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 457 selfloop transitions, 119 changer transitions 19/596 dead transitions. [2024-01-27 15:23:50,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 596 transitions, 12229 flow [2024-01-27 15:23:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:23:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:23:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 194 transitions. [2024-01-27 15:23:50,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2908545727136432 [2024-01-27 15:23:50,948 INFO L175 Difference]: Start difference. First operand has 531 places, 558 transitions, 10464 flow. Second operand 29 states and 194 transitions. [2024-01-27 15:23:50,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 596 transitions, 12229 flow [2024-01-27 15:23:53,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 596 transitions, 11496 flow, removed 256 selfloop flow, removed 23 redundant places. [2024-01-27 15:23:53,365 INFO L231 Difference]: Finished difference. Result has 535 places, 547 transitions, 9809 flow [2024-01-27 15:23:53,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9683, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9809, PETRI_PLACES=535, PETRI_TRANSITIONS=547} [2024-01-27 15:23:53,369 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 512 predicate places. [2024-01-27 15:23:53,369 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 547 transitions, 9809 flow [2024-01-27 15:23:53,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.621621621621622) internal successors, (171), 37 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:53,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:53,370 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:53,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:53,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:53,570 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:53,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash -200718644, now seen corresponding path program 94 times [2024-01-27 15:23:53,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:53,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070337904] [2024-01-27 15:23:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:54,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070337904] [2024-01-27 15:23:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070337904] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311405643] [2024-01-27 15:23:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:23:54,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:54,075 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:54,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-01-27 15:23:54,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:23:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:54,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:23:54,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:54,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:54,771 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:23:54,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:23:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:23:54,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311405643] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:54,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:54,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-27 15:23:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657439182] [2024-01-27 15:23:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:54,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:23:54,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:23:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:23:54,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:23:54,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 547 transitions, 9809 flow. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:54,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:54,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:23:54,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:56,627 INFO L124 PetriNetUnfolderBase]: 2032/3903 cut-off events. [2024-01-27 15:23:56,627 INFO L125 PetriNetUnfolderBase]: For 429519/429519 co-relation queries the response was YES. [2024-01-27 15:23:56,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49512 conditions, 3903 events. 2032/3903 cut-off events. For 429519/429519 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27498 event pairs, 828 based on Foata normal form. 16/3917 useless extension candidates. Maximal degree in co-relation 49292. Up to 3386 conditions per place. [2024-01-27 15:23:56,688 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 464 selfloop transitions, 101 changer transitions 21/587 dead transitions. [2024-01-27 15:23:56,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 587 transitions, 11444 flow [2024-01-27 15:23:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:23:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:23:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 149 transitions. [2024-01-27 15:23:56,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3239130434782609 [2024-01-27 15:23:56,690 INFO L175 Difference]: Start difference. First operand has 535 places, 547 transitions, 9809 flow. Second operand 20 states and 149 transitions. [2024-01-27 15:23:56,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 587 transitions, 11444 flow [2024-01-27 15:23:58,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 587 transitions, 11160 flow, removed 16 selfloop flow, removed 26 redundant places. [2024-01-27 15:23:58,949 INFO L231 Difference]: Finished difference. Result has 525 places, 540 transitions, 9626 flow [2024-01-27 15:23:58,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9479, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9626, PETRI_PLACES=525, PETRI_TRANSITIONS=540} [2024-01-27 15:23:58,950 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 502 predicate places. [2024-01-27 15:23:58,950 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 540 transitions, 9626 flow [2024-01-27 15:23:58,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:58,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:58,950 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:58,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:59,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-01-27 15:23:59,164 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:23:59,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1418534301, now seen corresponding path program 95 times [2024-01-27 15:23:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:59,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375235638] [2024-01-27 15:23:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:59,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:00,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:00,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375235638] [2024-01-27 15:24:00,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375235638] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:00,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686027112] [2024-01-27 15:24:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:24:00,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:00,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:00,034 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:00,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-01-27 15:24:00,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:24:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:00,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:24:00,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:00,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:00,821 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:24:00,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:24:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:00,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686027112] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:00,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:00,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 37 [2024-01-27 15:24:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273999854] [2024-01-27 15:24:00,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:00,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:24:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:24:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:24:00,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:00,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 540 transitions, 9626 flow. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:00,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:00,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:00,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:02,631 INFO L124 PetriNetUnfolderBase]: 2009/3847 cut-off events. [2024-01-27 15:24:02,631 INFO L125 PetriNetUnfolderBase]: For 434486/434486 co-relation queries the response was YES. [2024-01-27 15:24:02,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49192 conditions, 3847 events. 2009/3847 cut-off events. For 434486/434486 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26836 event pairs, 834 based on Foata normal form. 4/3849 useless extension candidates. Maximal degree in co-relation 48972. Up to 3409 conditions per place. [2024-01-27 15:24:02,691 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 454 selfloop transitions, 107 changer transitions 12/574 dead transitions. [2024-01-27 15:24:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 574 transitions, 11188 flow [2024-01-27 15:24:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:24:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:24:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 156 transitions. [2024-01-27 15:24:02,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948960302457467 [2024-01-27 15:24:02,692 INFO L175 Difference]: Start difference. First operand has 525 places, 540 transitions, 9626 flow. Second operand 23 states and 156 transitions. [2024-01-27 15:24:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 574 transitions, 11188 flow [2024-01-27 15:24:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 574 transitions, 10853 flow, removed 62 selfloop flow, removed 17 redundant places. [2024-01-27 15:24:04,920 INFO L231 Difference]: Finished difference. Result has 529 places, 541 transitions, 9540 flow [2024-01-27 15:24:04,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9299, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9540, PETRI_PLACES=529, PETRI_TRANSITIONS=541} [2024-01-27 15:24:04,920 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 506 predicate places. [2024-01-27 15:24:04,920 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 541 transitions, 9540 flow [2024-01-27 15:24:04,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:04,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:04,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:04,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-01-27 15:24:05,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-01-27 15:24:05,128 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:05,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:05,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1940398076, now seen corresponding path program 96 times [2024-01-27 15:24:05,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:05,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568302894] [2024-01-27 15:24:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:05,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568302894] [2024-01-27 15:24:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568302894] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400722170] [2024-01-27 15:24:05,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:24:05,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:05,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:05,989 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:05,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-01-27 15:24:06,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:24:06,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:06,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:24:06,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:06,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:06,715 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:24:06,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:24:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:06,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400722170] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:06,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:06,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 31 [2024-01-27 15:24:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162620617] [2024-01-27 15:24:06,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:06,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:24:06,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:24:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:24:06,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:06,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 541 transitions, 9540 flow. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:06,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:06,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:06,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:09,048 INFO L124 PetriNetUnfolderBase]: 2115/4044 cut-off events. [2024-01-27 15:24:09,048 INFO L125 PetriNetUnfolderBase]: For 484934/484934 co-relation queries the response was YES. [2024-01-27 15:24:09,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53263 conditions, 4044 events. 2115/4044 cut-off events. For 484934/484934 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28394 event pairs, 897 based on Foata normal form. 12/4054 useless extension candidates. Maximal degree in co-relation 53060. Up to 3578 conditions per place. [2024-01-27 15:24:09,107 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 545 selfloop transitions, 78 changer transitions 5/629 dead transitions. [2024-01-27 15:24:09,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 629 transitions, 13714 flow [2024-01-27 15:24:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:24:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:24:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 199 transitions. [2024-01-27 15:24:09,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34608695652173915 [2024-01-27 15:24:09,109 INFO L175 Difference]: Start difference. First operand has 529 places, 541 transitions, 9540 flow. Second operand 25 states and 199 transitions. [2024-01-27 15:24:09,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 629 transitions, 13714 flow [2024-01-27 15:24:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 629 transitions, 13481 flow, removed 12 selfloop flow, removed 19 redundant places. [2024-01-27 15:24:11,363 INFO L231 Difference]: Finished difference. Result has 536 places, 555 transitions, 10300 flow [2024-01-27 15:24:11,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9284, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10300, PETRI_PLACES=536, PETRI_TRANSITIONS=555} [2024-01-27 15:24:11,364 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 513 predicate places. [2024-01-27 15:24:11,364 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 555 transitions, 10300 flow [2024-01-27 15:24:11,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:11,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:11,366 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:11,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2024-01-27 15:24:11,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:11,569 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:11,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash 452769220, now seen corresponding path program 97 times [2024-01-27 15:24:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179993319] [2024-01-27 15:24:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:24:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:12,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179993319] [2024-01-27 15:24:12,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179993319] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:12,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411382945] [2024-01-27 15:24:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:24:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:12,334 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:12,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-01-27 15:24:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:12,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:24:12,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:12,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:24:12,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:24:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:12,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:13,049 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:24:13,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:24:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:13,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411382945] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:13,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:13,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-01-27 15:24:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398431793] [2024-01-27 15:24:13,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:24:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:24:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:24:13,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:13,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 555 transitions, 10300 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:13,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:13,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:13,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:14,934 INFO L124 PetriNetUnfolderBase]: 2099/4024 cut-off events. [2024-01-27 15:24:14,934 INFO L125 PetriNetUnfolderBase]: For 500481/500481 co-relation queries the response was YES. [2024-01-27 15:24:14,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53609 conditions, 4024 events. 2099/4024 cut-off events. For 500481/500481 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28294 event pairs, 936 based on Foata normal form. 12/4034 useless extension candidates. Maximal degree in co-relation 53382. Up to 3642 conditions per place. [2024-01-27 15:24:15,000 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 528 selfloop transitions, 76 changer transitions 3/608 dead transitions. [2024-01-27 15:24:15,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 608 transitions, 12685 flow [2024-01-27 15:24:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:24:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:24:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 164 transitions. [2024-01-27 15:24:15,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33954451345755693 [2024-01-27 15:24:15,001 INFO L175 Difference]: Start difference. First operand has 536 places, 555 transitions, 10300 flow. Second operand 21 states and 164 transitions. [2024-01-27 15:24:15,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 608 transitions, 12685 flow [2024-01-27 15:24:17,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 608 transitions, 12111 flow, removed 233 selfloop flow, removed 14 redundant places. [2024-01-27 15:24:17,192 INFO L231 Difference]: Finished difference. Result has 545 places, 556 transitions, 9968 flow [2024-01-27 15:24:17,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9709, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9968, PETRI_PLACES=545, PETRI_TRANSITIONS=556} [2024-01-27 15:24:17,192 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 522 predicate places. [2024-01-27 15:24:17,193 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 556 transitions, 9968 flow [2024-01-27 15:24:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:17,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:17,193 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:17,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:17,406 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:17,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1863120296, now seen corresponding path program 98 times [2024-01-27 15:24:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098262689] [2024-01-27 15:24:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:17,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098262689] [2024-01-27 15:24:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098262689] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006980030] [2024-01-27 15:24:17,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:24:17,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:17,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:17,906 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:17,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-01-27 15:24:18,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:24:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:18,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:24:18,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:18,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:24:18,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:24:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:24:18,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:18,621 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:24:18,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:24:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:18,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006980030] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:18,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 23 [2024-01-27 15:24:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230966039] [2024-01-27 15:24:18,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:24:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:24:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:24:18,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:18,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 556 transitions, 9968 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:18,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:18,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:18,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:20,575 INFO L124 PetriNetUnfolderBase]: 2136/4106 cut-off events. [2024-01-27 15:24:20,575 INFO L125 PetriNetUnfolderBase]: For 514343/514343 co-relation queries the response was YES. [2024-01-27 15:24:20,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54621 conditions, 4106 events. 2136/4106 cut-off events. For 514343/514343 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29065 event pairs, 944 based on Foata normal form. 8/4112 useless extension candidates. Maximal degree in co-relation 54389. Up to 3692 conditions per place. [2024-01-27 15:24:20,642 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 543 selfloop transitions, 68 changer transitions 8/620 dead transitions. [2024-01-27 15:24:20,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 620 transitions, 12808 flow [2024-01-27 15:24:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:24:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:24:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 163 transitions. [2024-01-27 15:24:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37299771167048057 [2024-01-27 15:24:20,643 INFO L175 Difference]: Start difference. First operand has 545 places, 556 transitions, 9968 flow. Second operand 19 states and 163 transitions. [2024-01-27 15:24:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 620 transitions, 12808 flow [2024-01-27 15:24:23,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 620 transitions, 12619 flow, removed 31 selfloop flow, removed 15 redundant places. [2024-01-27 15:24:23,318 INFO L231 Difference]: Finished difference. Result has 551 places, 560 transitions, 10184 flow [2024-01-27 15:24:23,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9779, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10184, PETRI_PLACES=551, PETRI_TRANSITIONS=560} [2024-01-27 15:24:23,318 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 528 predicate places. [2024-01-27 15:24:23,319 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 560 transitions, 10184 flow [2024-01-27 15:24:23,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:23,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:23,319 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:23,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-01-27 15:24:23,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-01-27 15:24:23,532 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:23,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1816713642, now seen corresponding path program 99 times [2024-01-27 15:24:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828435902] [2024-01-27 15:24:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:24:24,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828435902] [2024-01-27 15:24:24,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828435902] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802212623] [2024-01-27 15:24:24,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:24:24,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:24,184 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:24,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-01-27 15:24:24,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:24:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:24,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:24:24,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:24,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:24:24,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:24:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:24:24,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:24,963 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:24:24,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:24:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802212623] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:25,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:25,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 27 [2024-01-27 15:24:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115736234] [2024-01-27 15:24:25,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:25,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:24:25,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:25,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:24:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:24:25,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:25,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 560 transitions, 10184 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:25,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:27,113 INFO L124 PetriNetUnfolderBase]: 2137/4128 cut-off events. [2024-01-27 15:24:27,114 INFO L125 PetriNetUnfolderBase]: For 546151/546151 co-relation queries the response was YES. [2024-01-27 15:24:27,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55934 conditions, 4128 events. 2137/4128 cut-off events. For 546151/546151 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29387 event pairs, 922 based on Foata normal form. 26/4152 useless extension candidates. Maximal degree in co-relation 55701. Up to 3647 conditions per place. [2024-01-27 15:24:27,198 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 542 selfloop transitions, 92 changer transitions 3/638 dead transitions. [2024-01-27 15:24:27,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 638 transitions, 13914 flow [2024-01-27 15:24:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:24:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:24:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 224 transitions. [2024-01-27 15:24:27,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335832083958021 [2024-01-27 15:24:27,200 INFO L175 Difference]: Start difference. First operand has 551 places, 560 transitions, 10184 flow. Second operand 29 states and 224 transitions. [2024-01-27 15:24:27,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 638 transitions, 13914 flow [2024-01-27 15:24:29,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 638 transitions, 13557 flow, removed 115 selfloop flow, removed 15 redundant places. [2024-01-27 15:24:29,818 INFO L231 Difference]: Finished difference. Result has 574 places, 572 transitions, 10614 flow [2024-01-27 15:24:29,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9798, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10614, PETRI_PLACES=574, PETRI_TRANSITIONS=572} [2024-01-27 15:24:29,819 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 551 predicate places. [2024-01-27 15:24:29,819 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 572 transitions, 10614 flow [2024-01-27 15:24:29,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:29,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:29,819 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:29,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-01-27 15:24:30,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:30,033 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:30,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1892487058, now seen corresponding path program 100 times [2024-01-27 15:24:30,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:30,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169610727] [2024-01-27 15:24:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:30,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169610727] [2024-01-27 15:24:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169610727] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069405563] [2024-01-27 15:24:30,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:24:30,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:30,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:30,476 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:30,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-01-27 15:24:30,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:24:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:30,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:24:30,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:31,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:31,151 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:24:31,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:24:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:31,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069405563] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:31,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-27 15:24:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35150200] [2024-01-27 15:24:31,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:31,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:24:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:24:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:24:31,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:31,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 572 transitions, 10614 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:31,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:31,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:31,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:33,145 INFO L124 PetriNetUnfolderBase]: 2129/4138 cut-off events. [2024-01-27 15:24:33,146 INFO L125 PetriNetUnfolderBase]: For 565150/565150 co-relation queries the response was YES. [2024-01-27 15:24:33,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57204 conditions, 4138 events. 2129/4138 cut-off events. For 565150/565150 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29676 event pairs, 976 based on Foata normal form. 8/4144 useless extension candidates. Maximal degree in co-relation 56960. Up to 3852 conditions per place. [2024-01-27 15:24:33,220 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 555 selfloop transitions, 53 changer transitions 17/626 dead transitions. [2024-01-27 15:24:33,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 626 transitions, 13071 flow [2024-01-27 15:24:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:24:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:24:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 155 transitions. [2024-01-27 15:24:33,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-01-27 15:24:33,222 INFO L175 Difference]: Start difference. First operand has 574 places, 572 transitions, 10614 flow. Second operand 20 states and 155 transitions. [2024-01-27 15:24:33,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 626 transitions, 13071 flow [2024-01-27 15:24:36,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 626 transitions, 12532 flow, removed 222 selfloop flow, removed 16 redundant places. [2024-01-27 15:24:36,631 INFO L231 Difference]: Finished difference. Result has 581 places, 574 transitions, 10363 flow [2024-01-27 15:24:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10114, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10363, PETRI_PLACES=581, PETRI_TRANSITIONS=574} [2024-01-27 15:24:36,631 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 558 predicate places. [2024-01-27 15:24:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 574 transitions, 10363 flow [2024-01-27 15:24:36,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:36,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:36,633 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:36,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-01-27 15:24:36,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:36,848 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:36,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2088494178, now seen corresponding path program 101 times [2024-01-27 15:24:36,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:36,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604281008] [2024-01-27 15:24:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:36,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604281008] [2024-01-27 15:24:37,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604281008] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467063699] [2024-01-27 15:24:37,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:24:37,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:37,356 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:37,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-01-27 15:24:37,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:24:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:37,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:24:37,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:38,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:38,163 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:24:38,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:24:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467063699] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:38,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:24:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554627593] [2024-01-27 15:24:38,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:24:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:24:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:24:38,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:38,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 574 transitions, 10363 flow. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:38,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:38,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:38,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:40,146 INFO L124 PetriNetUnfolderBase]: 2128/4123 cut-off events. [2024-01-27 15:24:40,146 INFO L125 PetriNetUnfolderBase]: For 574239/574239 co-relation queries the response was YES. [2024-01-27 15:24:40,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57217 conditions, 4123 events. 2128/4123 cut-off events. For 574239/574239 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29377 event pairs, 974 based on Foata normal form. 8/4129 useless extension candidates. Maximal degree in co-relation 56968. Up to 3857 conditions per place. [2024-01-27 15:24:40,223 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 556 selfloop transitions, 54 changer transitions 4/615 dead transitions. [2024-01-27 15:24:40,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 615 transitions, 13012 flow [2024-01-27 15:24:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:24:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:24:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 152 transitions. [2024-01-27 15:24:40,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3146997929606625 [2024-01-27 15:24:40,224 INFO L175 Difference]: Start difference. First operand has 581 places, 574 transitions, 10363 flow. Second operand 21 states and 152 transitions. [2024-01-27 15:24:40,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 615 transitions, 13012 flow [2024-01-27 15:24:43,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 615 transitions, 12768 flow, removed 78 selfloop flow, removed 12 redundant places. [2024-01-27 15:24:43,362 INFO L231 Difference]: Finished difference. Result has 589 places, 576 transitions, 10367 flow [2024-01-27 15:24:43,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10367, PETRI_PLACES=589, PETRI_TRANSITIONS=576} [2024-01-27 15:24:43,363 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 566 predicate places. [2024-01-27 15:24:43,363 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 576 transitions, 10367 flow [2024-01-27 15:24:43,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:43,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:43,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:43,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-01-27 15:24:43,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-01-27 15:24:43,576 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:43,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:43,577 INFO L85 PathProgramCache]: Analyzing trace with hash 959115486, now seen corresponding path program 102 times [2024-01-27 15:24:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201480836] [2024-01-27 15:24:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:43,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:44,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201480836] [2024-01-27 15:24:44,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201480836] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:44,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116373244] [2024-01-27 15:24:44,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:24:44,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:44,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:44,799 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:44,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-01-27 15:24:45,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:24:45,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:45,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:24:45,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:45,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:24:45,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:24:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:45,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:45,588 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:24:45,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:24:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116373244] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:45,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:45,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 32 [2024-01-27 15:24:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633353129] [2024-01-27 15:24:45,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:24:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:24:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:24:45,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:45,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 576 transitions, 10367 flow. Second operand has 32 states, 32 states have (on average 4.6875) internal successors, (150), 32 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:45,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:45,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:45,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:48,056 INFO L124 PetriNetUnfolderBase]: 2165/4205 cut-off events. [2024-01-27 15:24:48,057 INFO L125 PetriNetUnfolderBase]: For 598796/598796 co-relation queries the response was YES. [2024-01-27 15:24:48,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58847 conditions, 4205 events. 2165/4205 cut-off events. For 598796/598796 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30201 event pairs, 947 based on Foata normal form. 8/4211 useless extension candidates. Maximal degree in co-relation 58597. Up to 3728 conditions per place. [2024-01-27 15:24:48,134 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 540 selfloop transitions, 88 changer transitions 4/633 dead transitions. [2024-01-27 15:24:48,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 633 transitions, 12873 flow [2024-01-27 15:24:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:24:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:24:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 199 transitions. [2024-01-27 15:24:48,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090062111801242 [2024-01-27 15:24:48,135 INFO L175 Difference]: Start difference. First operand has 589 places, 576 transitions, 10367 flow. Second operand 28 states and 199 transitions. [2024-01-27 15:24:48,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 633 transitions, 12873 flow [2024-01-27 15:24:51,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 633 transitions, 12637 flow, removed 46 selfloop flow, removed 20 redundant places. [2024-01-27 15:24:51,817 INFO L231 Difference]: Finished difference. Result has 598 places, 578 transitions, 10463 flow [2024-01-27 15:24:51,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10131, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10463, PETRI_PLACES=598, PETRI_TRANSITIONS=578} [2024-01-27 15:24:51,818 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 575 predicate places. [2024-01-27 15:24:51,818 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 578 transitions, 10463 flow [2024-01-27 15:24:51,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 32 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:51,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:51,818 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:51,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:52,031 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1096626874, now seen corresponding path program 103 times [2024-01-27 15:24:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155069132] [2024-01-27 15:24:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:52,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:52,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155069132] [2024-01-27 15:24:52,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155069132] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:52,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763568100] [2024-01-27 15:24:52,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:24:52,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:52,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:52,554 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:52,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-01-27 15:24:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:53,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:24:53,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:53,199 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:24:53,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-01-27 15:24:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:53,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:53,328 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:24:53,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:24:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763568100] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:53,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:53,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-27 15:24:53,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201342320] [2024-01-27 15:24:53,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:24:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:24:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:24:53,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:24:53,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 578 transitions, 10463 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:53,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:53,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:24:53,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:55,348 INFO L124 PetriNetUnfolderBase]: 2201/4265 cut-off events. [2024-01-27 15:24:55,348 INFO L125 PetriNetUnfolderBase]: For 625972/625972 co-relation queries the response was YES. [2024-01-27 15:24:55,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60541 conditions, 4265 events. 2201/4265 cut-off events. For 625972/625972 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30683 event pairs, 1016 based on Foata normal form. 8/4271 useless extension candidates. Maximal degree in co-relation 60287. Up to 4006 conditions per place. [2024-01-27 15:24:55,424 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 565 selfloop transitions, 49 changer transitions 0/615 dead transitions. [2024-01-27 15:24:55,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 615 transitions, 13091 flow [2024-01-27 15:24:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:24:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:24:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 129 transitions. [2024-01-27 15:24:55,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3115942028985507 [2024-01-27 15:24:55,425 INFO L175 Difference]: Start difference. First operand has 598 places, 578 transitions, 10463 flow. Second operand 18 states and 129 transitions. [2024-01-27 15:24:55,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 615 transitions, 13091 flow [2024-01-27 15:24:59,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 615 transitions, 12871 flow, removed 30 selfloop flow, removed 25 redundant places. [2024-01-27 15:24:59,135 INFO L231 Difference]: Finished difference. Result has 594 places, 584 transitions, 10602 flow [2024-01-27 15:24:59,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10602, PETRI_PLACES=594, PETRI_TRANSITIONS=584} [2024-01-27 15:24:59,136 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 571 predicate places. [2024-01-27 15:24:59,136 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 584 transitions, 10602 flow [2024-01-27 15:24:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:59,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:59,136 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:59,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:59,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-01-27 15:24:59,349 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:24:59,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1848496226, now seen corresponding path program 104 times [2024-01-27 15:24:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:59,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350581735] [2024-01-27 15:24:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:59,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350581735] [2024-01-27 15:24:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350581735] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120695516] [2024-01-27 15:24:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:24:59,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:59,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:59,815 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:24:59,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-01-27 15:25:00,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:25:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:00,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:25:00,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:00,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:25:00,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:25:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:25:00,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:00,613 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:25:00,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:25:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:00,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120695516] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:00,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:00,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-27 15:25:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084901200] [2024-01-27 15:25:00,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:00,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:25:00,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:00,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:25:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:25:00,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:00,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 584 transitions, 10602 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:00,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:00,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:00,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:03,077 INFO L124 PetriNetUnfolderBase]: 2274/4407 cut-off events. [2024-01-27 15:25:03,078 INFO L125 PetriNetUnfolderBase]: For 668323/668323 co-relation queries the response was YES. [2024-01-27 15:25:03,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63864 conditions, 4407 events. 2274/4407 cut-off events. For 668323/668323 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31928 event pairs, 954 based on Foata normal form. 8/4413 useless extension candidates. Maximal degree in co-relation 63608. Up to 3811 conditions per place. [2024-01-27 15:25:03,162 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 570 selfloop transitions, 95 changer transitions 5/671 dead transitions. [2024-01-27 15:25:03,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 671 transitions, 14912 flow [2024-01-27 15:25:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:25:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:25:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 212 transitions. [2024-01-27 15:25:03,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32919254658385094 [2024-01-27 15:25:03,163 INFO L175 Difference]: Start difference. First operand has 594 places, 584 transitions, 10602 flow. Second operand 28 states and 212 transitions. [2024-01-27 15:25:03,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 671 transitions, 14912 flow [2024-01-27 15:25:07,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 671 transitions, 14637 flow, removed 93 selfloop flow, removed 13 redundant places. [2024-01-27 15:25:07,485 INFO L231 Difference]: Finished difference. Result has 612 places, 596 transitions, 11147 flow [2024-01-27 15:25:07,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10423, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11147, PETRI_PLACES=612, PETRI_TRANSITIONS=596} [2024-01-27 15:25:07,486 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 589 predicate places. [2024-01-27 15:25:07,486 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 596 transitions, 11147 flow [2024-01-27 15:25:07,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:07,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:07,486 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:07,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-01-27 15:25:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:07,701 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:07,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -419161931, now seen corresponding path program 105 times [2024-01-27 15:25:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:07,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457787244] [2024-01-27 15:25:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:08,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457787244] [2024-01-27 15:25:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457787244] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341841096] [2024-01-27 15:25:08,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:25:08,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:08,164 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:08,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-01-27 15:25:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:25:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:08,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:25:08,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:08,841 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:25:08,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:25:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:08,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:08,999 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:25:08,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:25:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341841096] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:09,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:09,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2024-01-27 15:25:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783586641] [2024-01-27 15:25:09,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:25:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:25:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:25:09,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:09,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 596 transitions, 11147 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:09,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:09,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:09,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:10,980 INFO L124 PetriNetUnfolderBase]: 2320/4479 cut-off events. [2024-01-27 15:25:10,980 INFO L125 PetriNetUnfolderBase]: For 704609/704609 co-relation queries the response was YES. [2024-01-27 15:25:11,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65821 conditions, 4479 events. 2320/4479 cut-off events. For 704609/704609 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32535 event pairs, 1073 based on Foata normal form. 12/4489 useless extension candidates. Maximal degree in co-relation 65561. Up to 4169 conditions per place. [2024-01-27 15:25:11,066 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 601 selfloop transitions, 51 changer transitions 0/653 dead transitions. [2024-01-27 15:25:11,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 653 transitions, 13678 flow [2024-01-27 15:25:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:25:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:25:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 148 transitions. [2024-01-27 15:25:11,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357487922705314 [2024-01-27 15:25:11,067 INFO L175 Difference]: Start difference. First operand has 612 places, 596 transitions, 11147 flow. Second operand 18 states and 148 transitions. [2024-01-27 15:25:11,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 653 transitions, 13678 flow [2024-01-27 15:25:15,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 653 transitions, 13232 flow, removed 149 selfloop flow, removed 22 redundant places. [2024-01-27 15:25:15,181 INFO L231 Difference]: Finished difference. Result has 612 places, 603 transitions, 11065 flow [2024-01-27 15:25:15,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10701, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11065, PETRI_PLACES=612, PETRI_TRANSITIONS=603} [2024-01-27 15:25:15,182 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 589 predicate places. [2024-01-27 15:25:15,182 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 603 transitions, 11065 flow [2024-01-27 15:25:15,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:15,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:15,182 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:15,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:15,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-01-27 15:25:15,396 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:15,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1675230825, now seen corresponding path program 106 times [2024-01-27 15:25:15,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:15,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210909865] [2024-01-27 15:25:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:15,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:15,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210909865] [2024-01-27 15:25:15,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210909865] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:15,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429268201] [2024-01-27 15:25:15,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:25:15,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:15,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:15,815 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:15,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-01-27 15:25:16,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:25:16,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:16,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:25:16,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:16,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:16,529 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:25:16,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:25:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429268201] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:16,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-27 15:25:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421501995] [2024-01-27 15:25:16,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:25:16,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:25:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:25:16,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:16,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 603 transitions, 11065 flow. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 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 15:25:16,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:16,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:16,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:18,663 INFO L124 PetriNetUnfolderBase]: 2346/4521 cut-off events. [2024-01-27 15:25:18,663 INFO L125 PetriNetUnfolderBase]: For 749431/749431 co-relation queries the response was YES. [2024-01-27 15:25:18,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67114 conditions, 4521 events. 2346/4521 cut-off events. For 749431/749431 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32870 event pairs, 1051 based on Foata normal form. 12/4531 useless extension candidates. Maximal degree in co-relation 66850. Up to 4131 conditions per place. [2024-01-27 15:25:18,751 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 585 selfloop transitions, 64 changer transitions 0/650 dead transitions. [2024-01-27 15:25:18,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 650 transitions, 13640 flow [2024-01-27 15:25:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:25:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:25:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-01-27 15:25:18,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35805626598465473 [2024-01-27 15:25:18,752 INFO L175 Difference]: Start difference. First operand has 612 places, 603 transitions, 11065 flow. Second operand 17 states and 140 transitions. [2024-01-27 15:25:18,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 650 transitions, 13640 flow [2024-01-27 15:25:23,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 650 transitions, 13419 flow, removed 59 selfloop flow, removed 15 redundant places. [2024-01-27 15:25:23,446 INFO L231 Difference]: Finished difference. Result has 615 places, 606 transitions, 11192 flow [2024-01-27 15:25:23,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10844, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11192, PETRI_PLACES=615, PETRI_TRANSITIONS=606} [2024-01-27 15:25:23,446 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 592 predicate places. [2024-01-27 15:25:23,446 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 606 transitions, 11192 flow [2024-01-27 15:25:23,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 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 15:25:23,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:23,447 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:23,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-01-27 15:25:23,655 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:23,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1398877861, now seen corresponding path program 107 times [2024-01-27 15:25:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:23,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858329449] [2024-01-27 15:25:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:23,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858329449] [2024-01-27 15:25:24,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858329449] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671577855] [2024-01-27 15:25:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:25:24,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:24,209 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-01-27 15:25:24,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:25:24,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:24,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:25:24,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:24,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:25:24,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-27 15:25:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:24,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:25,149 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:25:25,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:25:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:25,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671577855] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:25,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:25,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:25:25,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521753409] [2024-01-27 15:25:25,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:25,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:25:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:25:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:25:25,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:25,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 606 transitions, 11192 flow. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:25,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:25,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:25,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:28,047 INFO L124 PetriNetUnfolderBase]: 2432/4700 cut-off events. [2024-01-27 15:25:28,047 INFO L125 PetriNetUnfolderBase]: For 842792/842792 co-relation queries the response was YES. [2024-01-27 15:25:28,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71622 conditions, 4700 events. 2432/4700 cut-off events. For 842792/842792 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34535 event pairs, 1029 based on Foata normal form. 12/4710 useless extension candidates. Maximal degree in co-relation 71359. Up to 4095 conditions per place. [2024-01-27 15:25:28,135 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 622 selfloop transitions, 90 changer transitions 6/719 dead transitions. [2024-01-27 15:25:28,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 719 transitions, 15568 flow [2024-01-27 15:25:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:25:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:25:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 235 transitions. [2024-01-27 15:25:28,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784219001610306 [2024-01-27 15:25:28,137 INFO L175 Difference]: Start difference. First operand has 615 places, 606 transitions, 11192 flow. Second operand 27 states and 235 transitions. [2024-01-27 15:25:28,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 719 transitions, 15568 flow [2024-01-27 15:25:33,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 719 transitions, 15388 flow, removed 54 selfloop flow, removed 13 redundant places. [2024-01-27 15:25:33,263 INFO L231 Difference]: Finished difference. Result has 637 places, 623 transitions, 12185 flow [2024-01-27 15:25:33,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12185, PETRI_PLACES=637, PETRI_TRANSITIONS=623} [2024-01-27 15:25:33,263 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 614 predicate places. [2024-01-27 15:25:33,263 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 623 transitions, 12185 flow [2024-01-27 15:25:33,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:33,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:33,264 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:33,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:33,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-01-27 15:25:33,478 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:33,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash 541668866, now seen corresponding path program 108 times [2024-01-27 15:25:33,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:33,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743887363] [2024-01-27 15:25:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:33,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:33,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:33,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743887363] [2024-01-27 15:25:33,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743887363] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:33,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785676797] [2024-01-27 15:25:33,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:25:33,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:33,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:33,955 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:33,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-01-27 15:25:34,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:25:34,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:34,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:25:34,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:34,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:34,771 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:25:34,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:25:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785676797] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:34,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:34,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-01-27 15:25:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195467167] [2024-01-27 15:25:34,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:25:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:25:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:25:34,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:34,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 623 transitions, 12185 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:34,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:34,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:34,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:37,184 INFO L124 PetriNetUnfolderBase]: 2418/4676 cut-off events. [2024-01-27 15:25:37,184 INFO L125 PetriNetUnfolderBase]: For 921429/921429 co-relation queries the response was YES. [2024-01-27 15:25:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73600 conditions, 4676 events. 2418/4676 cut-off events. For 921429/921429 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34294 event pairs, 1144 based on Foata normal form. 8/4682 useless extension candidates. Maximal degree in co-relation 73327. Up to 4443 conditions per place. [2024-01-27 15:25:37,264 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 588 selfloop transitions, 40 changer transitions 23/652 dead transitions. [2024-01-27 15:25:37,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 652 transitions, 13863 flow [2024-01-27 15:25:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:25:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:25:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 116 transitions. [2024-01-27 15:25:37,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31521739130434784 [2024-01-27 15:25:37,265 INFO L175 Difference]: Start difference. First operand has 637 places, 623 transitions, 12185 flow. Second operand 16 states and 116 transitions. [2024-01-27 15:25:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 652 transitions, 13863 flow [2024-01-27 15:25:43,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 652 transitions, 13031 flow, removed 366 selfloop flow, removed 17 redundant places. [2024-01-27 15:25:43,386 INFO L231 Difference]: Finished difference. Result has 638 places, 619 transitions, 11450 flow [2024-01-27 15:25:43,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11434, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11450, PETRI_PLACES=638, PETRI_TRANSITIONS=619} [2024-01-27 15:25:43,387 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 615 predicate places. [2024-01-27 15:25:43,387 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 619 transitions, 11450 flow [2024-01-27 15:25:43,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:43,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:43,387 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:43,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-01-27 15:25:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2024-01-27 15:25:43,601 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:43,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1513007361, now seen corresponding path program 109 times [2024-01-27 15:25:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645968713] [2024-01-27 15:25:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:25:44,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645968713] [2024-01-27 15:25:44,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645968713] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943146974] [2024-01-27 15:25:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:25:44,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:44,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:44,338 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-01-27 15:25:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:44,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:25:44,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:44,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:25:44,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:25:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:44,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:45,069 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:25:45,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:25:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:45,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943146974] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:45,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:45,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-01-27 15:25:45,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276801388] [2024-01-27 15:25:45,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:25:45,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:25:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:25:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:45,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 619 transitions, 11450 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:45,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:45,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:45,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:47,566 INFO L124 PetriNetUnfolderBase]: 2405/4646 cut-off events. [2024-01-27 15:25:47,566 INFO L125 PetriNetUnfolderBase]: For 917813/917813 co-relation queries the response was YES. [2024-01-27 15:25:47,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71391 conditions, 4646 events. 2405/4646 cut-off events. For 917813/917813 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34005 event pairs, 1076 based on Foata normal form. 24/4668 useless extension candidates. Maximal degree in co-relation 71115. Up to 4251 conditions per place. [2024-01-27 15:25:47,660 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 574 selfloop transitions, 81 changer transitions 3/659 dead transitions. [2024-01-27 15:25:47,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 659 transitions, 13904 flow [2024-01-27 15:25:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:25:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:25:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 165 transitions. [2024-01-27 15:25:47,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-27 15:25:47,662 INFO L175 Difference]: Start difference. First operand has 638 places, 619 transitions, 11450 flow. Second operand 22 states and 165 transitions. [2024-01-27 15:25:47,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 659 transitions, 13904 flow [2024-01-27 15:25:54,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 659 transitions, 13704 flow, removed 60 selfloop flow, removed 12 redundant places. [2024-01-27 15:25:54,127 INFO L231 Difference]: Finished difference. Result has 644 places, 620 transitions, 11569 flow [2024-01-27 15:25:54,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11254, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11569, PETRI_PLACES=644, PETRI_TRANSITIONS=620} [2024-01-27 15:25:54,128 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 621 predicate places. [2024-01-27 15:25:54,128 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 620 transitions, 11569 flow [2024-01-27 15:25:54,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:54,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:54,128 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:54,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-01-27 15:25:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:54,356 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:25:54,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 771226015, now seen corresponding path program 110 times [2024-01-27 15:25:54,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:54,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907165799] [2024-01-27 15:25:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:54,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:25:55,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907165799] [2024-01-27 15:25:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907165799] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554685837] [2024-01-27 15:25:55,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:25:55,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:55,109 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:25:55,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-01-27 15:25:55,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:25:55,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:55,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:25:55,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:25:55,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:55,968 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:25:55,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:25:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:25:56,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554685837] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:56,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:56,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-01-27 15:25:56,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765765008] [2024-01-27 15:25:56,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:56,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:25:56,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:25:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:25:56,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:25:56,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 620 transitions, 11569 flow. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:56,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:56,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:25:56,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:58,951 INFO L124 PetriNetUnfolderBase]: 2436/4691 cut-off events. [2024-01-27 15:25:58,952 INFO L125 PetriNetUnfolderBase]: For 920602/920602 co-relation queries the response was YES. [2024-01-27 15:25:59,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72718 conditions, 4691 events. 2436/4691 cut-off events. For 920602/920602 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34315 event pairs, 1071 based on Foata normal form. 12/4701 useless extension candidates. Maximal degree in co-relation 72441. Up to 4304 conditions per place. [2024-01-27 15:25:59,048 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 598 selfloop transitions, 81 changer transitions 0/680 dead transitions. [2024-01-27 15:25:59,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 680 transitions, 14147 flow [2024-01-27 15:25:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:25:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:25:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 188 transitions. [2024-01-27 15:25:59,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269565217391304 [2024-01-27 15:25:59,049 INFO L175 Difference]: Start difference. First operand has 644 places, 620 transitions, 11569 flow. Second operand 25 states and 188 transitions. [2024-01-27 15:25:59,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 680 transitions, 14147 flow [2024-01-27 15:26:04,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 680 transitions, 13885 flow, removed 55 selfloop flow, removed 21 redundant places. [2024-01-27 15:26:04,785 INFO L231 Difference]: Finished difference. Result has 647 places, 623 transitions, 11518 flow [2024-01-27 15:26:04,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11217, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11518, PETRI_PLACES=647, PETRI_TRANSITIONS=623} [2024-01-27 15:26:04,785 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 624 predicate places. [2024-01-27 15:26:04,785 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 623 transitions, 11518 flow [2024-01-27 15:26:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:04,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:04,786 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:04,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-01-27 15:26:04,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:04,999 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:05,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1193206525, now seen corresponding path program 111 times [2024-01-27 15:26:05,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:05,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769006139] [2024-01-27 15:26:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:05,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769006139] [2024-01-27 15:26:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769006139] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975504663] [2024-01-27 15:26:06,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:26:06,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:06,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:06,091 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:06,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-01-27 15:26:06,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:26:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:06,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-27 15:26:06,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:06,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:06,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:26:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:26:06,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:07,019 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:26:07,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:26:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:07,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975504663] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:07,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 10] total 36 [2024-01-27 15:26:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799064085] [2024-01-27 15:26:07,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:07,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:26:07,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:26:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:26:07,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:26:07,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 623 transitions, 11518 flow. Second operand has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:07,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:26:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:09,990 INFO L124 PetriNetUnfolderBase]: 2396/4596 cut-off events. [2024-01-27 15:26:09,990 INFO L125 PetriNetUnfolderBase]: For 876151/876151 co-relation queries the response was YES. [2024-01-27 15:26:10,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70778 conditions, 4596 events. 2396/4596 cut-off events. For 876151/876151 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33295 event pairs, 1017 based on Foata normal form. 14/4608 useless extension candidates. Maximal degree in co-relation 70501. Up to 4075 conditions per place. [2024-01-27 15:26:10,082 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 564 selfloop transitions, 95 changer transitions 17/677 dead transitions. [2024-01-27 15:26:10,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 677 transitions, 13984 flow [2024-01-27 15:26:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:26:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:26:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 233 transitions. [2024-01-27 15:26:10,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2979539641943734 [2024-01-27 15:26:10,083 INFO L175 Difference]: Start difference. First operand has 647 places, 623 transitions, 11518 flow. Second operand 34 states and 233 transitions. [2024-01-27 15:26:10,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 677 transitions, 13984 flow [2024-01-27 15:26:15,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 677 transitions, 13786 flow, removed 15 selfloop flow, removed 25 redundant places. [2024-01-27 15:26:15,097 INFO L231 Difference]: Finished difference. Result has 653 places, 611 transitions, 11343 flow [2024-01-27 15:26:15,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11233, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11343, PETRI_PLACES=653, PETRI_TRANSITIONS=611} [2024-01-27 15:26:15,097 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 630 predicate places. [2024-01-27 15:26:15,098 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 611 transitions, 11343 flow [2024-01-27 15:26:15,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:15,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:15,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:15,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:15,312 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:15,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1662427799, now seen corresponding path program 112 times [2024-01-27 15:26:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:15,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878689659] [2024-01-27 15:26:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878689659] [2024-01-27 15:26:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878689659] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135118084] [2024-01-27 15:26:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:26:16,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:16,420 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:16,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-01-27 15:26:16,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:26:16,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:16,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:26:16,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:17,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:17,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-01-27 15:26:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:17,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:17,205 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:26:17,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:26:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135118084] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:17,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:17,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 35 [2024-01-27 15:26:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576879623] [2024-01-27 15:26:17,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:17,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:26:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:26:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:26:17,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:26:17,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 611 transitions, 11343 flow. Second operand has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:17,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:17,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:26:17,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:19,715 INFO L124 PetriNetUnfolderBase]: 2407/4614 cut-off events. [2024-01-27 15:26:19,716 INFO L125 PetriNetUnfolderBase]: For 915006/915006 co-relation queries the response was YES. [2024-01-27 15:26:19,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72212 conditions, 4614 events. 2407/4614 cut-off events. For 915006/915006 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33440 event pairs, 1008 based on Foata normal form. 8/4620 useless extension candidates. Maximal degree in co-relation 71935. Up to 4126 conditions per place. [2024-01-27 15:26:19,813 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 583 selfloop transitions, 87 changer transitions 7/678 dead transitions. [2024-01-27 15:26:19,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 678 transitions, 14548 flow [2024-01-27 15:26:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:26:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:26:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 193 transitions. [2024-01-27 15:26:19,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3356521739130435 [2024-01-27 15:26:19,814 INFO L175 Difference]: Start difference. First operand has 653 places, 611 transitions, 11343 flow. Second operand 25 states and 193 transitions. [2024-01-27 15:26:19,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 678 transitions, 14548 flow [2024-01-27 15:26:25,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 678 transitions, 14316 flow, removed 13 selfloop flow, removed 33 redundant places. [2024-01-27 15:26:26,004 INFO L231 Difference]: Finished difference. Result has 643 places, 615 transitions, 11725 flow [2024-01-27 15:26:26,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11123, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11725, PETRI_PLACES=643, PETRI_TRANSITIONS=615} [2024-01-27 15:26:26,005 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 620 predicate places. [2024-01-27 15:26:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 615 transitions, 11725 flow [2024-01-27 15:26:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:26,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:26,005 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:26,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2024-01-27 15:26:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:26,216 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:26,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1684055207, now seen corresponding path program 113 times [2024-01-27 15:26:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:26,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505994672] [2024-01-27 15:26:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505994672] [2024-01-27 15:26:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505994672] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286063119] [2024-01-27 15:26:27,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:26:27,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:27,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:27,148 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:27,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-01-27 15:26:27,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:26:27,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:27,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:26:27,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:27,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:28,003 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:26:28,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:26:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286063119] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:28,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:28,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 37 [2024-01-27 15:26:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026115383] [2024-01-27 15:26:28,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:26:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:26:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:26:28,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:26:28,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 615 transitions, 11725 flow. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:28,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:28,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:26:28,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:30,468 INFO L124 PetriNetUnfolderBase]: 2395/4586 cut-off events. [2024-01-27 15:26:30,469 INFO L125 PetriNetUnfolderBase]: For 960442/960442 co-relation queries the response was YES. [2024-01-27 15:26:30,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72814 conditions, 4586 events. 2395/4586 cut-off events. For 960442/960442 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33113 event pairs, 1105 based on Foata normal form. 4/4588 useless extension candidates. Maximal degree in co-relation 72535. Up to 4372 conditions per place. [2024-01-27 15:26:30,557 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 565 selfloop transitions, 62 changer transitions 12/640 dead transitions. [2024-01-27 15:26:30,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 640 transitions, 13325 flow [2024-01-27 15:26:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:26:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:26:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 145 transitions. [2024-01-27 15:26:30,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2865612648221344 [2024-01-27 15:26:30,559 INFO L175 Difference]: Start difference. First operand has 643 places, 615 transitions, 11725 flow. Second operand 22 states and 145 transitions. [2024-01-27 15:26:30,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 640 transitions, 13325 flow [2024-01-27 15:26:36,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 640 transitions, 12789 flow, removed 195 selfloop flow, removed 19 redundant places. [2024-01-27 15:26:36,303 INFO L231 Difference]: Finished difference. Result has 646 places, 612 transitions, 11283 flow [2024-01-27 15:26:36,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11178, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11283, PETRI_PLACES=646, PETRI_TRANSITIONS=612} [2024-01-27 15:26:36,304 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 623 predicate places. [2024-01-27 15:26:36,304 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 612 transitions, 11283 flow [2024-01-27 15:26:36,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:36,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:36,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:36,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2024-01-27 15:26:36,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:36,517 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:36,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:36,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1048522677, now seen corresponding path program 114 times [2024-01-27 15:26:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:36,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989456425] [2024-01-27 15:26:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989456425] [2024-01-27 15:26:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989456425] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446103378] [2024-01-27 15:26:37,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:26:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:37,655 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:37,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-01-27 15:26:38,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:26:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:38,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:26:38,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:38,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:26:38,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:26:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:38,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:38,502 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:26:38,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:26:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:38,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446103378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:38,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:38,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 33 [2024-01-27 15:26:38,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969242551] [2024-01-27 15:26:38,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:38,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:26:38,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:26:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:26:38,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:26:38,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 612 transitions, 11283 flow. Second operand has 33 states, 33 states have (on average 4.757575757575758) internal successors, (157), 33 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:38,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:38,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:26:38,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:41,262 INFO L124 PetriNetUnfolderBase]: 2394/4566 cut-off events. [2024-01-27 15:26:41,262 INFO L125 PetriNetUnfolderBase]: For 941836/941836 co-relation queries the response was YES. [2024-01-27 15:26:41,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71559 conditions, 4566 events. 2394/4566 cut-off events. For 941836/941836 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32822 event pairs, 1004 based on Foata normal form. 12/4574 useless extension candidates. Maximal degree in co-relation 71321. Up to 4142 conditions per place. [2024-01-27 15:26:41,354 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 564 selfloop transitions, 97 changer transitions 6/668 dead transitions. [2024-01-27 15:26:41,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 668 transitions, 13789 flow [2024-01-27 15:26:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:26:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:26:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 215 transitions. [2024-01-27 15:26:41,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3015427769985975 [2024-01-27 15:26:41,356 INFO L175 Difference]: Start difference. First operand has 646 places, 612 transitions, 11283 flow. Second operand 31 states and 215 transitions. [2024-01-27 15:26:41,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 668 transitions, 13789 flow [2024-01-27 15:26:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 668 transitions, 13604 flow, removed 22 selfloop flow, removed 22 redundant places. [2024-01-27 15:26:47,154 INFO L231 Difference]: Finished difference. Result has 649 places, 614 transitions, 11473 flow [2024-01-27 15:26:47,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11079, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11473, PETRI_PLACES=649, PETRI_TRANSITIONS=614} [2024-01-27 15:26:47,155 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 626 predicate places. [2024-01-27 15:26:47,155 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 614 transitions, 11473 flow [2024-01-27 15:26:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.757575757575758) internal successors, (157), 33 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:47,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:47,155 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:47,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2024-01-27 15:26:47,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2024-01-27 15:26:47,368 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:47,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:47,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1274884981, now seen corresponding path program 115 times [2024-01-27 15:26:47,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:47,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325417812] [2024-01-27 15:26:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:47,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325417812] [2024-01-27 15:26:47,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325417812] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:47,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751112643] [2024-01-27 15:26:47,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:26:47,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:47,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:47,851 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:47,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-01-27 15:26:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:48,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:26:48,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:48,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:48,566 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:26:48,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:26:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751112643] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:48,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:48,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-27 15:26:48,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756766173] [2024-01-27 15:26:48,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:48,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:26:48,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:26:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:26:48,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:26:48,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 614 transitions, 11473 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:48,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:48,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:26:48,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:50,766 INFO L124 PetriNetUnfolderBase]: 2387/4561 cut-off events. [2024-01-27 15:26:50,766 INFO L125 PetriNetUnfolderBase]: For 921956/921956 co-relation queries the response was YES. [2024-01-27 15:26:50,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71315 conditions, 4561 events. 2387/4561 cut-off events. For 921956/921956 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32777 event pairs, 1097 based on Foata normal form. 4/4559 useless extension candidates. Maximal degree in co-relation 71037. Up to 4358 conditions per place. [2024-01-27 15:26:50,846 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 584 selfloop transitions, 39 changer transitions 16/640 dead transitions. [2024-01-27 15:26:50,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 640 transitions, 13284 flow [2024-01-27 15:26:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:26:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:26:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 109 transitions. [2024-01-27 15:26:50,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296195652173913 [2024-01-27 15:26:50,847 INFO L175 Difference]: Start difference. First operand has 649 places, 614 transitions, 11473 flow. Second operand 16 states and 109 transitions. [2024-01-27 15:26:50,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 640 transitions, 13284 flow [2024-01-27 15:26:56,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 640 transitions, 12960 flow, removed 71 selfloop flow, removed 27 redundant places. [2024-01-27 15:26:56,041 INFO L231 Difference]: Finished difference. Result has 641 places, 614 transitions, 11247 flow [2024-01-27 15:26:56,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11151, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11247, PETRI_PLACES=641, PETRI_TRANSITIONS=614} [2024-01-27 15:26:56,042 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 618 predicate places. [2024-01-27 15:26:56,042 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 614 transitions, 11247 flow [2024-01-27 15:26:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:56,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:56,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:56,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2024-01-27 15:26:56,245 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:26:56,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1899732967, now seen corresponding path program 116 times [2024-01-27 15:26:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136868960] [2024-01-27 15:26:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:26:56,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136868960] [2024-01-27 15:26:56,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136868960] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755433885] [2024-01-27 15:26:56,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:26:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:56,938 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:56,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-01-27 15:26:57,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:26:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:57,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:26:57,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:26:57,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:57,758 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:26:57,759 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:26:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:26:57,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755433885] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:57,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:57,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-01-27 15:26:57,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784056806] [2024-01-27 15:26:57,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:57,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:26:57,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:26:57,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:26:57,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:26:57,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 614 transitions, 11247 flow. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:57,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:26:57,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:00,183 INFO L124 PetriNetUnfolderBase]: 2371/4514 cut-off events. [2024-01-27 15:27:00,183 INFO L125 PetriNetUnfolderBase]: For 951159/951159 co-relation queries the response was YES. [2024-01-27 15:27:00,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70999 conditions, 4514 events. 2371/4514 cut-off events. For 951159/951159 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32223 event pairs, 1085 based on Foata normal form. 6/4514 useless extension candidates. Maximal degree in co-relation 70719. Up to 4309 conditions per place. [2024-01-27 15:27:00,282 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 558 selfloop transitions, 59 changer transitions 19/637 dead transitions. [2024-01-27 15:27:00,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 637 transitions, 12824 flow [2024-01-27 15:27:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:27:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:27:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 150 transitions. [2024-01-27 15:27:00,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2835538752362949 [2024-01-27 15:27:00,283 INFO L175 Difference]: Start difference. First operand has 641 places, 614 transitions, 11247 flow. Second operand 23 states and 150 transitions. [2024-01-27 15:27:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 637 transitions, 12824 flow [2024-01-27 15:27:06,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 637 transitions, 12697 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-01-27 15:27:06,878 INFO L231 Difference]: Finished difference. Result has 645 places, 606 transitions, 11130 flow [2024-01-27 15:27:06,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11066, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11130, PETRI_PLACES=645, PETRI_TRANSITIONS=606} [2024-01-27 15:27:06,879 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 622 predicate places. [2024-01-27 15:27:06,879 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 606 transitions, 11130 flow [2024-01-27 15:27:06,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:06,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:06,879 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:06,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:07,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-01-27 15:27:07,092 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:07,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:07,093 INFO L85 PathProgramCache]: Analyzing trace with hash -740093, now seen corresponding path program 117 times [2024-01-27 15:27:07,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:07,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87500851] [2024-01-27 15:27:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:07,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:27:07,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:07,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87500851] [2024-01-27 15:27:07,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87500851] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:07,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389029439] [2024-01-27 15:27:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:27:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:07,898 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:07,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-01-27 15:27:08,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:27:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:08,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:27:08,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:08,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:08,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:27:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:08,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:08,710 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:27:08,710 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:27:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389029439] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:08,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-01-27 15:27:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13673126] [2024-01-27 15:27:08,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:08,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:27:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:27:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:27:08,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:27:08,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 606 transitions, 11130 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:08,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:08,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:27:08,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:11,103 INFO L124 PetriNetUnfolderBase]: 2350/4442 cut-off events. [2024-01-27 15:27:11,103 INFO L125 PetriNetUnfolderBase]: For 955778/955778 co-relation queries the response was YES. [2024-01-27 15:27:11,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70198 conditions, 4442 events. 2350/4442 cut-off events. For 955778/955778 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 31387 event pairs, 1032 based on Foata normal form. 6/4442 useless extension candidates. Maximal degree in co-relation 69919. Up to 4171 conditions per place. [2024-01-27 15:27:11,200 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 553 selfloop transitions, 74 changer transitions 13/641 dead transitions. [2024-01-27 15:27:11,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 641 transitions, 12907 flow [2024-01-27 15:27:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:27:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:27:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 170 transitions. [2024-01-27 15:27:11,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3079710144927536 [2024-01-27 15:27:11,201 INFO L175 Difference]: Start difference. First operand has 645 places, 606 transitions, 11130 flow. Second operand 24 states and 170 transitions. [2024-01-27 15:27:11,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 641 transitions, 12907 flow [2024-01-27 15:27:17,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 641 transitions, 12707 flow, removed 29 selfloop flow, removed 24 redundant places. [2024-01-27 15:27:17,202 INFO L231 Difference]: Finished difference. Result has 633 places, 599 transitions, 11002 flow [2024-01-27 15:27:17,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10878, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11002, PETRI_PLACES=633, PETRI_TRANSITIONS=599} [2024-01-27 15:27:17,203 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 610 predicate places. [2024-01-27 15:27:17,203 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 599 transitions, 11002 flow [2024-01-27 15:27:17,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:17,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:17,203 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:17,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2024-01-27 15:27:17,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-01-27 15:27:17,412 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:17,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1874007596, now seen corresponding path program 118 times [2024-01-27 15:27:17,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:17,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804446842] [2024-01-27 15:27:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:27:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804446842] [2024-01-27 15:27:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804446842] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596944738] [2024-01-27 15:27:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:27:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:18,179 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:18,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-01-27 15:27:18,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:27:18,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:18,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:27:18,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:18,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:18,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:27:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:18,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:19,033 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:27:19,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:27:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596944738] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:19,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:19,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-01-27 15:27:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398153858] [2024-01-27 15:27:19,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:19,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:27:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:27:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:27:19,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:27:19,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 599 transitions, 11002 flow. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:19,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:19,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:27:19,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:21,589 INFO L124 PetriNetUnfolderBase]: 2291/4315 cut-off events. [2024-01-27 15:27:21,589 INFO L125 PetriNetUnfolderBase]: For 921514/921514 co-relation queries the response was YES. [2024-01-27 15:27:21,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68276 conditions, 4315 events. 2291/4315 cut-off events. For 921514/921514 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30106 event pairs, 966 based on Foata normal form. 12/4321 useless extension candidates. Maximal degree in co-relation 68001. Up to 3941 conditions per place. [2024-01-27 15:27:21,675 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 537 selfloop transitions, 84 changer transitions 9/631 dead transitions. [2024-01-27 15:27:21,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 631 transitions, 13484 flow [2024-01-27 15:27:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:27:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:27:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 166 transitions. [2024-01-27 15:27:21,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.288695652173913 [2024-01-27 15:27:21,677 INFO L175 Difference]: Start difference. First operand has 633 places, 599 transitions, 11002 flow. Second operand 25 states and 166 transitions. [2024-01-27 15:27:21,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 631 transitions, 13484 flow [2024-01-27 15:27:27,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 631 transitions, 13274 flow, removed 14 selfloop flow, removed 26 redundant places. [2024-01-27 15:27:27,203 INFO L231 Difference]: Finished difference. Result has 625 places, 592 transitions, 10854 flow [2024-01-27 15:27:27,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10727, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10854, PETRI_PLACES=625, PETRI_TRANSITIONS=592} [2024-01-27 15:27:27,203 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 602 predicate places. [2024-01-27 15:27:27,203 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 592 transitions, 10854 flow [2024-01-27 15:27:27,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:27,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:27,204 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:27,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:27,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:27,416 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:27,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -383458744, now seen corresponding path program 119 times [2024-01-27 15:27:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:27,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455340145] [2024-01-27 15:27:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:27,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455340145] [2024-01-27 15:27:27,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455340145] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:27,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126170985] [2024-01-27 15:27:27,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:27:27,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:27,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:27,913 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:27,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-01-27 15:27:28,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:27:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:28,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:27:28,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:28,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:28,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-27 15:27:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:28,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:28,728 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:27:28,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:27:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126170985] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:28,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:28,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:27:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730588405] [2024-01-27 15:27:28,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:27:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:27:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:27:28,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:27:28,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 592 transitions, 10854 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:28,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:28,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:27:28,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:30,888 INFO L124 PetriNetUnfolderBase]: 2255/4230 cut-off events. [2024-01-27 15:27:30,888 INFO L125 PetriNetUnfolderBase]: For 898766/898766 co-relation queries the response was YES. [2024-01-27 15:27:30,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66906 conditions, 4230 events. 2255/4230 cut-off events. For 898766/898766 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29213 event pairs, 994 based on Foata normal form. 8/4232 useless extension candidates. Maximal degree in co-relation 66634. Up to 4016 conditions per place. [2024-01-27 15:27:30,966 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 555 selfloop transitions, 53 changer transitions 8/617 dead transitions. [2024-01-27 15:27:30,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 617 transitions, 12659 flow [2024-01-27 15:27:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:27:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:27:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 131 transitions. [2024-01-27 15:27:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2997711670480549 [2024-01-27 15:27:30,967 INFO L175 Difference]: Start difference. First operand has 625 places, 592 transitions, 10854 flow. Second operand 19 states and 131 transitions. [2024-01-27 15:27:30,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 617 transitions, 12659 flow [2024-01-27 15:27:36,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 617 transitions, 12430 flow, removed 26 selfloop flow, removed 24 redundant places. [2024-01-27 15:27:36,133 INFO L231 Difference]: Finished difference. Result has 614 places, 588 transitions, 10686 flow [2024-01-27 15:27:36,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10597, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10686, PETRI_PLACES=614, PETRI_TRANSITIONS=588} [2024-01-27 15:27:36,134 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 591 predicate places. [2024-01-27 15:27:36,134 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 588 transitions, 10686 flow [2024-01-27 15:27:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:36,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:36,135 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:36,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:36,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:36,342 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:36,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1121818488, now seen corresponding path program 120 times [2024-01-27 15:27:36,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:36,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663958272] [2024-01-27 15:27:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:36,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:36,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:36,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663958272] [2024-01-27 15:27:36,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663958272] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:36,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560679493] [2024-01-27 15:27:36,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:27:36,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:36,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:36,864 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-01-27 15:27:37,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:27:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:37,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:27:37,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:37,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:37,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:27:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:27:37,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:37,843 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:27:37,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:27:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560679493] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:37,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:37,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-27 15:27:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606769895] [2024-01-27 15:27:37,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:27:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:27:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:27:37,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:27:37,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 588 transitions, 10686 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:37,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:37,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:27:37,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:39,955 INFO L124 PetriNetUnfolderBase]: 2294/4306 cut-off events. [2024-01-27 15:27:39,955 INFO L125 PetriNetUnfolderBase]: For 935515/935515 co-relation queries the response was YES. [2024-01-27 15:27:40,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68522 conditions, 4306 events. 2294/4306 cut-off events. For 935515/935515 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29962 event pairs, 831 based on Foata normal form. 4/4304 useless extension candidates. Maximal degree in co-relation 68251. Up to 3612 conditions per place. [2024-01-27 15:27:40,041 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 527 selfloop transitions, 111 changer transitions 2/641 dead transitions. [2024-01-27 15:27:40,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 641 transitions, 13819 flow [2024-01-27 15:27:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:27:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:27:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 142 transitions. [2024-01-27 15:27:40,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34299516908212563 [2024-01-27 15:27:40,042 INFO L175 Difference]: Start difference. First operand has 614 places, 588 transitions, 10686 flow. Second operand 18 states and 142 transitions. [2024-01-27 15:27:40,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 641 transitions, 13819 flow [2024-01-27 15:27:44,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 641 transitions, 13692 flow, removed 6 selfloop flow, removed 17 redundant places. [2024-01-27 15:27:44,803 INFO L231 Difference]: Finished difference. Result has 616 places, 593 transitions, 11133 flow [2024-01-27 15:27:44,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10561, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11133, PETRI_PLACES=616, PETRI_TRANSITIONS=593} [2024-01-27 15:27:44,803 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 593 predicate places. [2024-01-27 15:27:44,804 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 593 transitions, 11133 flow [2024-01-27 15:27:44,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:44,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:44,804 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:44,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:45,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-01-27 15:27:45,006 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:45,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:45,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1201166410, now seen corresponding path program 121 times [2024-01-27 15:27:45,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:45,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553562945] [2024-01-27 15:27:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:45,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:27:45,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:45,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553562945] [2024-01-27 15:27:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553562945] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:45,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710927688] [2024-01-27 15:27:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:27:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:45,826 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:45,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-01-27 15:27:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:46,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:27:46,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:46,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:46,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:27:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:46,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:46,675 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:27:46,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:27:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:46,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710927688] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:46,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:46,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-01-27 15:27:46,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58191222] [2024-01-27 15:27:46,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:46,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:27:46,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:27:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:27:46,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:27:46,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 593 transitions, 11133 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:46,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:46,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:27:46,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:48,947 INFO L124 PetriNetUnfolderBase]: 2337/4411 cut-off events. [2024-01-27 15:27:48,947 INFO L125 PetriNetUnfolderBase]: For 994042/994042 co-relation queries the response was YES. [2024-01-27 15:27:49,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71275 conditions, 4411 events. 2337/4411 cut-off events. For 994042/994042 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30987 event pairs, 968 based on Foata normal form. 16/4421 useless extension candidates. Maximal degree in co-relation 71001. Up to 3883 conditions per place. [2024-01-27 15:27:49,031 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 569 selfloop transitions, 84 changer transitions 3/657 dead transitions. [2024-01-27 15:27:49,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 657 transitions, 14289 flow [2024-01-27 15:27:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:27:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:27:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 178 transitions. [2024-01-27 15:27:49,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35177865612648224 [2024-01-27 15:27:49,032 INFO L175 Difference]: Start difference. First operand has 616 places, 593 transitions, 11133 flow. Second operand 22 states and 178 transitions. [2024-01-27 15:27:49,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 657 transitions, 14289 flow [2024-01-27 15:27:54,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 657 transitions, 13794 flow, removed 154 selfloop flow, removed 14 redundant places. [2024-01-27 15:27:54,824 INFO L231 Difference]: Finished difference. Result has 625 places, 595 transitions, 11057 flow [2024-01-27 15:27:54,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10648, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11057, PETRI_PLACES=625, PETRI_TRANSITIONS=595} [2024-01-27 15:27:54,825 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 602 predicate places. [2024-01-27 15:27:54,825 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 595 transitions, 11057 flow [2024-01-27 15:27:54,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:54,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:54,825 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:54,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2024-01-27 15:27:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2024-01-27 15:27:55,038 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:27:55,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -310023152, now seen corresponding path program 122 times [2024-01-27 15:27:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999687488] [2024-01-27 15:27:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:55,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:55,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999687488] [2024-01-27 15:27:55,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999687488] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125152582] [2024-01-27 15:27:55,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:27:55,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:55,577 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:27:55,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-01-27 15:27:56,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:27:56,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:56,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:27:56,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:56,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:27:56,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:27:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:27:56,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:27:56,430 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:27:56,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:27:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:27:56,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125152582] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:27:56,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:27:56,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 23 [2024-01-27 15:27:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858771386] [2024-01-27 15:27:56,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:27:56,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:27:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:27:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:27:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:27:56,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:27:56,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 595 transitions, 11057 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:56,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:27:56,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:27:56,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:27:58,861 INFO L124 PetriNetUnfolderBase]: 2408/4566 cut-off events. [2024-01-27 15:27:58,862 INFO L125 PetriNetUnfolderBase]: For 1058979/1058979 co-relation queries the response was YES. [2024-01-27 15:27:58,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74849 conditions, 4566 events. 2408/4566 cut-off events. For 1058979/1058979 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32505 event pairs, 996 based on Foata normal form. 8/4568 useless extension candidates. Maximal degree in co-relation 74573. Up to 3984 conditions per place. [2024-01-27 15:27:58,997 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 591 selfloop transitions, 92 changer transitions 4/688 dead transitions. [2024-01-27 15:27:58,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 688 transitions, 15591 flow [2024-01-27 15:27:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:27:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:27:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 203 transitions. [2024-01-27 15:27:58,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35304347826086957 [2024-01-27 15:27:58,999 INFO L175 Difference]: Start difference. First operand has 625 places, 595 transitions, 11057 flow. Second operand 25 states and 203 transitions. [2024-01-27 15:27:58,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 688 transitions, 15591 flow [2024-01-27 15:28:04,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 688 transitions, 15369 flow, removed 57 selfloop flow, removed 17 redundant places. [2024-01-27 15:28:04,417 INFO L231 Difference]: Finished difference. Result has 638 places, 608 transitions, 11858 flow [2024-01-27 15:28:04,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10836, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11858, PETRI_PLACES=638, PETRI_TRANSITIONS=608} [2024-01-27 15:28:04,417 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 615 predicate places. [2024-01-27 15:28:04,417 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 608 transitions, 11858 flow [2024-01-27 15:28:04,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:04,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:04,418 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:04,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:04,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:04,624 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:04,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash -211936620, now seen corresponding path program 123 times [2024-01-27 15:28:04,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:04,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854211473] [2024-01-27 15:28:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:05,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854211473] [2024-01-27 15:28:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854211473] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:05,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505476169] [2024-01-27 15:28:05,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:28:05,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:05,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:05,130 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:05,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-01-27 15:28:05,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:28:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:05,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-27 15:28:05,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:06,096 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:28:06,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:28:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:28:06,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:06,417 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:28:06,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:28:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:06,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505476169] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:06,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:06,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 29 [2024-01-27 15:28:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329565024] [2024-01-27 15:28:06,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:06,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:28:06,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:28:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:28:06,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:28:06,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 608 transitions, 11858 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:06,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:06,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:28:06,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:09,010 INFO L124 PetriNetUnfolderBase]: 2431/4637 cut-off events. [2024-01-27 15:28:09,011 INFO L125 PetriNetUnfolderBase]: For 1103911/1103911 co-relation queries the response was YES. [2024-01-27 15:28:09,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77195 conditions, 4637 events. 2431/4637 cut-off events. For 1103911/1103911 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33493 event pairs, 173 based on Foata normal form. 6/4637 useless extension candidates. Maximal degree in co-relation 76912. Up to 2828 conditions per place. [2024-01-27 15:28:09,107 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 446 selfloop transitions, 247 changer transitions 6/700 dead transitions. [2024-01-27 15:28:09,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 700 transitions, 16661 flow [2024-01-27 15:28:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:28:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:28:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 185 transitions. [2024-01-27 15:28:09,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-01-27 15:28:09,108 INFO L175 Difference]: Start difference. First operand has 638 places, 608 transitions, 11858 flow. Second operand 25 states and 185 transitions. [2024-01-27 15:28:09,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 700 transitions, 16661 flow [2024-01-27 15:28:15,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 648 places, 700 transitions, 16005 flow, removed 290 selfloop flow, removed 14 redundant places. [2024-01-27 15:28:15,569 INFO L231 Difference]: Finished difference. Result has 654 places, 628 transitions, 12942 flow [2024-01-27 15:28:15,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11268, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12942, PETRI_PLACES=654, PETRI_TRANSITIONS=628} [2024-01-27 15:28:15,570 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 631 predicate places. [2024-01-27 15:28:15,570 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 628 transitions, 12942 flow [2024-01-27 15:28:15,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:15,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:15,570 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:15,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:15,784 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1571394013, now seen corresponding path program 124 times [2024-01-27 15:28:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:15,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237120911] [2024-01-27 15:28:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:15,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:28:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237120911] [2024-01-27 15:28:16,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237120911] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871733552] [2024-01-27 15:28:16,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:28:16,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:16,570 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:16,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-01-27 15:28:17,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:28:17,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:17,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:28:17,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:17,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:17,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:28:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:17,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:17,531 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:28:17,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:28:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871733552] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:17,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:17,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-01-27 15:28:17,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912339502] [2024-01-27 15:28:17,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:17,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:28:17,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:17,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:28:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:28:17,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:28:17,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 628 transitions, 12942 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:17,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:17,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:28:17,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:19,862 INFO L124 PetriNetUnfolderBase]: 2437/4658 cut-off events. [2024-01-27 15:28:19,862 INFO L125 PetriNetUnfolderBase]: For 1186096/1186096 co-relation queries the response was YES. [2024-01-27 15:28:19,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79272 conditions, 4658 events. 2437/4658 cut-off events. For 1186096/1186096 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33760 event pairs, 686 based on Foata normal form. 6/4658 useless extension candidates. Maximal degree in co-relation 78983. Up to 2965 conditions per place. [2024-01-27 15:28:19,963 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 451 selfloop transitions, 211 changer transitions 1/664 dead transitions. [2024-01-27 15:28:19,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 664 transitions, 15592 flow [2024-01-27 15:28:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:28:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:28:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 126 transitions. [2024-01-27 15:28:19,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423913043478261 [2024-01-27 15:28:19,965 INFO L175 Difference]: Start difference. First operand has 654 places, 628 transitions, 12942 flow. Second operand 16 states and 126 transitions. [2024-01-27 15:28:19,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 664 transitions, 15592 flow [2024-01-27 15:28:27,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 664 transitions, 14566 flow, removed 358 selfloop flow, removed 18 redundant places. [2024-01-27 15:28:27,852 INFO L231 Difference]: Finished difference. Result has 652 places, 629 transitions, 12493 flow [2024-01-27 15:28:27,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12002, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12493, PETRI_PLACES=652, PETRI_TRANSITIONS=629} [2024-01-27 15:28:27,853 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 629 predicate places. [2024-01-27 15:28:27,853 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 629 transitions, 12493 flow [2024-01-27 15:28:27,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:27,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:27,854 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:27,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:28,068 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -233659400, now seen corresponding path program 125 times [2024-01-27 15:28:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45302834] [2024-01-27 15:28:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:28,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45302834] [2024-01-27 15:28:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45302834] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462668950] [2024-01-27 15:28:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:28:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:28,564 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:28,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-01-27 15:28:29,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:28:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:29,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:28:29,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:29,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:28:29,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-27 15:28:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:29,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:29,409 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:28:29,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:28:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:29,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462668950] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:29,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:28:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644484620] [2024-01-27 15:28:29,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:29,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:28:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:28:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:28:29,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:28:29,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 629 transitions, 12493 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:29,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:29,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:28:29,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:32,551 INFO L124 PetriNetUnfolderBase]: 2567/4936 cut-off events. [2024-01-27 15:28:32,551 INFO L125 PetriNetUnfolderBase]: For 1254517/1254517 co-relation queries the response was YES. [2024-01-27 15:28:32,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84432 conditions, 4936 events. 2567/4936 cut-off events. For 1254517/1254517 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36347 event pairs, 1061 based on Foata normal form. 20/4950 useless extension candidates. Maximal degree in co-relation 84142. Up to 4252 conditions per place. [2024-01-27 15:28:32,651 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 639 selfloop transitions, 92 changer transitions 4/736 dead transitions. [2024-01-27 15:28:32,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 736 transitions, 18461 flow [2024-01-27 15:28:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:28:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:28:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 218 transitions. [2024-01-27 15:28:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385093167701863 [2024-01-27 15:28:32,652 INFO L175 Difference]: Start difference. First operand has 652 places, 629 transitions, 12493 flow. Second operand 28 states and 218 transitions. [2024-01-27 15:28:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 736 transitions, 18461 flow [2024-01-27 15:28:41,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 736 transitions, 17397 flow, removed 321 selfloop flow, removed 14 redundant places. [2024-01-27 15:28:41,341 INFO L231 Difference]: Finished difference. Result has 671 places, 652 transitions, 13759 flow [2024-01-27 15:28:41,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11989, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13759, PETRI_PLACES=671, PETRI_TRANSITIONS=652} [2024-01-27 15:28:41,342 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 648 predicate places. [2024-01-27 15:28:41,342 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 652 transitions, 13759 flow [2024-01-27 15:28:41,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:41,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:41,342 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:41,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-01-27 15:28:41,556 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:41,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1067722912, now seen corresponding path program 126 times [2024-01-27 15:28:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319005914] [2024-01-27 15:28:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:28:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319005914] [2024-01-27 15:28:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319005914] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367602498] [2024-01-27 15:28:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:28:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:42,698 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:42,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-01-27 15:28:43,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:28:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:28:43,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:28:43,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:43,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:43,525 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:28:43,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:28:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367602498] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:43,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:43,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 34 [2024-01-27 15:28:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574961846] [2024-01-27 15:28:43,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:43,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:28:43,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:28:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:28:43,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:28:43,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 652 transitions, 13759 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:43,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:43,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:28:43,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:46,641 INFO L124 PetriNetUnfolderBase]: 2560/4961 cut-off events. [2024-01-27 15:28:46,641 INFO L125 PetriNetUnfolderBase]: For 886729/886729 co-relation queries the response was YES. [2024-01-27 15:28:46,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78395 conditions, 4961 events. 2560/4961 cut-off events. For 886729/886729 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36772 event pairs, 1149 based on Foata normal form. 12/4967 useless extension candidates. Maximal degree in co-relation 78100. Up to 4574 conditions per place. [2024-01-27 15:28:46,731 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 625 selfloop transitions, 80 changer transitions 28/734 dead transitions. [2024-01-27 15:28:46,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 734 transitions, 17071 flow [2024-01-27 15:28:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:28:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:28:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 260 transitions. [2024-01-27 15:28:46,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30552291421856637 [2024-01-27 15:28:46,760 INFO L175 Difference]: Start difference. First operand has 671 places, 652 transitions, 13759 flow. Second operand 37 states and 260 transitions. [2024-01-27 15:28:46,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 734 transitions, 17071 flow [2024-01-27 15:28:52,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 734 transitions, 15836 flow, removed 583 selfloop flow, removed 13 redundant places. [2024-01-27 15:28:52,822 INFO L231 Difference]: Finished difference. Result has 701 places, 658 transitions, 13293 flow [2024-01-27 15:28:52,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12486, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13293, PETRI_PLACES=701, PETRI_TRANSITIONS=658} [2024-01-27 15:28:52,823 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 678 predicate places. [2024-01-27 15:28:52,823 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 658 transitions, 13293 flow [2024-01-27 15:28:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:52,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:28:52,823 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:28:52,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-01-27 15:28:53,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-01-27 15:28:53,037 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:28:53,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:28:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1129120954, now seen corresponding path program 127 times [2024-01-27 15:28:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:28:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269838134] [2024-01-27 15:28:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:28:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:28:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:53,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:28:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269838134] [2024-01-27 15:28:53,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269838134] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:28:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925349431] [2024-01-27 15:28:53,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:28:53,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:28:53,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:28:53,512 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:28:53,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-01-27 15:28:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:28:54,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:28:54,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:28:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:54,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:54,349 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:28:54,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:28:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:28:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925349431] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:54,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:54,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-27 15:28:54,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494009263] [2024-01-27 15:28:54,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:54,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:28:54,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:54,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:28:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:28:54,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:28:54,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 658 transitions, 13293 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:54,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:54,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:28:54,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:56,802 INFO L124 PetriNetUnfolderBase]: 2548/4943 cut-off events. [2024-01-27 15:28:56,803 INFO L125 PetriNetUnfolderBase]: For 889464/889464 co-relation queries the response was YES. [2024-01-27 15:28:56,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76962 conditions, 4943 events. 2548/4943 cut-off events. For 889464/889464 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36662 event pairs, 1165 based on Foata normal form. 8/4945 useless extension candidates. Maximal degree in co-relation 76701. Up to 4646 conditions per place. [2024-01-27 15:28:56,901 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 639 selfloop transitions, 47 changer transitions 14/701 dead transitions. [2024-01-27 15:28:56,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 701 transitions, 15520 flow [2024-01-27 15:28:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:28:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:28:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-01-27 15:28:56,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35038363171355497 [2024-01-27 15:28:56,902 INFO L175 Difference]: Start difference. First operand has 701 places, 658 transitions, 13293 flow. Second operand 17 states and 137 transitions. [2024-01-27 15:28:56,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 701 transitions, 15520 flow [2024-01-27 15:29:03,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 701 transitions, 14735 flow, removed 340 selfloop flow, removed 24 redundant places. [2024-01-27 15:29:03,265 INFO L231 Difference]: Finished difference. Result has 692 places, 657 transitions, 12662 flow [2024-01-27 15:29:03,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12497, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12662, PETRI_PLACES=692, PETRI_TRANSITIONS=657} [2024-01-27 15:29:03,265 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 669 predicate places. [2024-01-27 15:29:03,265 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 657 transitions, 12662 flow [2024-01-27 15:29:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:03,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:03,266 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:03,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:03,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2024-01-27 15:29:03,479 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:03,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1441016754, now seen corresponding path program 128 times [2024-01-27 15:29:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:03,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007449505] [2024-01-27 15:29:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007449505] [2024-01-27 15:29:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007449505] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000255413] [2024-01-27 15:29:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:03,948 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:03,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-01-27 15:29:04,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:04,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:04,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-27 15:29:04,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:04,682 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:29:04,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:29:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:29:04,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:04,923 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:29:04,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:29:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000255413] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:04,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:04,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 29 [2024-01-27 15:29:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485971070] [2024-01-27 15:29:04,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:04,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:29:04,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:29:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:29:04,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:29:04,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 657 transitions, 12662 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:04,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:04,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:29:04,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:07,814 INFO L124 PetriNetUnfolderBase]: 2881/5568 cut-off events. [2024-01-27 15:29:07,814 INFO L125 PetriNetUnfolderBase]: For 1017863/1017863 co-relation queries the response was YES. [2024-01-27 15:29:07,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88238 conditions, 5568 events. 2881/5568 cut-off events. For 1017863/1017863 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42632 event pairs, 101 based on Foata normal form. 8/5570 useless extension candidates. Maximal degree in co-relation 87932. Up to 2130 conditions per place. [2024-01-27 15:29:07,941 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 532 selfloop transitions, 325 changer transitions 11/869 dead transitions. [2024-01-27 15:29:07,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 869 transitions, 20692 flow [2024-01-27 15:29:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:29:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:29:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 188 transitions. [2024-01-27 15:29:07,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269565217391304 [2024-01-27 15:29:07,942 INFO L175 Difference]: Start difference. First operand has 692 places, 657 transitions, 12662 flow. Second operand 25 states and 188 transitions. [2024-01-27 15:29:07,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 869 transitions, 20692 flow [2024-01-27 15:29:16,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 869 transitions, 20431 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-01-27 15:29:16,727 INFO L231 Difference]: Finished difference. Result has 707 places, 700 transitions, 15063 flow [2024-01-27 15:29:16,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15063, PETRI_PLACES=707, PETRI_TRANSITIONS=700} [2024-01-27 15:29:16,728 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 684 predicate places. [2024-01-27 15:29:16,728 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 700 transitions, 15063 flow [2024-01-27 15:29:16,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:16,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:16,729 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:16,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2024-01-27 15:29:16,942 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:16,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1718661469, now seen corresponding path program 129 times [2024-01-27 15:29:16,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:16,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213076656] [2024-01-27 15:29:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:18,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213076656] [2024-01-27 15:29:18,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213076656] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795011121] [2024-01-27 15:29:18,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:18,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:18,003 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:18,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-01-27 15:29:18,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:29:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:18,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:29:18,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:18,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:18,892 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:29:18,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:29:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:18,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795011121] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:18,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:18,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 32 [2024-01-27 15:29:18,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693118029] [2024-01-27 15:29:18,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:18,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:29:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:29:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:29:18,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:29:18,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 700 transitions, 15063 flow. Second operand has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:18,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:18,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:29:18,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:21,879 INFO L124 PetriNetUnfolderBase]: 2923/5652 cut-off events. [2024-01-27 15:29:21,879 INFO L125 PetriNetUnfolderBase]: For 1123478/1123478 co-relation queries the response was YES. [2024-01-27 15:29:21,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93977 conditions, 5652 events. 2923/5652 cut-off events. For 1123478/1123478 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43005 event pairs, 1372 based on Foata normal form. 12/5660 useless extension candidates. Maximal degree in co-relation 93664. Up to 5309 conditions per place. [2024-01-27 15:29:22,019 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 689 selfloop transitions, 63 changer transitions 0/753 dead transitions. [2024-01-27 15:29:22,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 753 transitions, 18095 flow [2024-01-27 15:29:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:29:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:29:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 167 transitions. [2024-01-27 15:29:22,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3300395256916996 [2024-01-27 15:29:22,020 INFO L175 Difference]: Start difference. First operand has 707 places, 700 transitions, 15063 flow. Second operand 22 states and 167 transitions. [2024-01-27 15:29:22,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 753 transitions, 18095 flow [2024-01-27 15:29:30,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 753 transitions, 16648 flow, removed 572 selfloop flow, removed 11 redundant places. [2024-01-27 15:29:30,594 INFO L231 Difference]: Finished difference. Result has 720 places, 704 transitions, 14000 flow [2024-01-27 15:29:30,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13645, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14000, PETRI_PLACES=720, PETRI_TRANSITIONS=704} [2024-01-27 15:29:30,594 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 697 predicate places. [2024-01-27 15:29:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 704 transitions, 14000 flow [2024-01-27 15:29:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:30,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:30,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:30,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:30,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:30,808 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:30,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:30,809 INFO L85 PathProgramCache]: Analyzing trace with hash 924341998, now seen corresponding path program 130 times [2024-01-27 15:29:30,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:30,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778486933] [2024-01-27 15:29:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:30,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778486933] [2024-01-27 15:29:32,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778486933] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896954946] [2024-01-27 15:29:32,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:29:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:32,087 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:32,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-01-27 15:29:32,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:32,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:32,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:29:32,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:32,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:32,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:29:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:32,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:33,067 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:29:33,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-27 15:29:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:33,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896954946] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:33,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:33,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-01-27 15:29:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141003431] [2024-01-27 15:29:33,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:29:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:29:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:29:33,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:29:33,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 704 transitions, 14000 flow. Second operand has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:33,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:33,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:29:33,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:36,956 INFO L124 PetriNetUnfolderBase]: 3010/5826 cut-off events. [2024-01-27 15:29:36,956 INFO L125 PetriNetUnfolderBase]: For 1106935/1106935 co-relation queries the response was YES. [2024-01-27 15:29:37,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93716 conditions, 5826 events. 3010/5826 cut-off events. For 1106935/1106935 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 44766 event pairs, 293 based on Foata normal form. 8/5832 useless extension candidates. Maximal degree in co-relation 93401. Up to 3632 conditions per place. [2024-01-27 15:29:37,066 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 532 selfloop transitions, 252 changer transitions 4/789 dead transitions. [2024-01-27 15:29:37,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 789 transitions, 18988 flow [2024-01-27 15:29:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:29:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:29:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 212 transitions. [2024-01-27 15:29:37,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2973352033660589 [2024-01-27 15:29:37,067 INFO L175 Difference]: Start difference. First operand has 720 places, 704 transitions, 14000 flow. Second operand 31 states and 212 transitions. [2024-01-27 15:29:37,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 789 transitions, 18988 flow [2024-01-27 15:29:44,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 789 transitions, 18621 flow, removed 119 selfloop flow, removed 20 redundant places. [2024-01-27 15:29:44,795 INFO L231 Difference]: Finished difference. Result has 734 places, 715 transitions, 14952 flow [2024-01-27 15:29:44,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13739, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14952, PETRI_PLACES=734, PETRI_TRANSITIONS=715} [2024-01-27 15:29:44,796 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 711 predicate places. [2024-01-27 15:29:44,796 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 715 transitions, 14952 flow [2024-01-27 15:29:44,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:44,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:44,796 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:44,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2024-01-27 15:29:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2024-01-27 15:29:45,011 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:45,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 280828091, now seen corresponding path program 131 times [2024-01-27 15:29:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:45,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346375317] [2024-01-27 15:29:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346375317] [2024-01-27 15:29:45,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346375317] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698192230] [2024-01-27 15:29:45,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:45,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:45,553 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:45,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-01-27 15:29:46,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:29:46,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:46,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:29:46,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:46,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:46,474 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:29:46,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:29:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698192230] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:46,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:29:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617046365] [2024-01-27 15:29:46,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:29:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:29:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:29:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:29:46,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 715 transitions, 14952 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:46,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:46,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:29:46,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:49,775 INFO L124 PetriNetUnfolderBase]: 3012/5839 cut-off events. [2024-01-27 15:29:49,775 INFO L125 PetriNetUnfolderBase]: For 989145/989145 co-relation queries the response was YES. [2024-01-27 15:29:49,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92050 conditions, 5839 events. 3012/5839 cut-off events. For 989145/989145 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45126 event pairs, 965 based on Foata normal form. 2/5839 useless extension candidates. Maximal degree in co-relation 91731. Up to 4035 conditions per place. [2024-01-27 15:29:49,885 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 537 selfloop transitions, 203 changer transitions 17/758 dead transitions. [2024-01-27 15:29:49,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 758 transitions, 17854 flow [2024-01-27 15:29:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:29:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:29:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 92 transitions. [2024-01-27 15:29:49,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-01-27 15:29:49,886 INFO L175 Difference]: Start difference. First operand has 734 places, 715 transitions, 14952 flow. Second operand 11 states and 92 transitions. [2024-01-27 15:29:49,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 758 transitions, 17854 flow [2024-01-27 15:29:57,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 758 transitions, 16850 flow, removed 316 selfloop flow, removed 25 redundant places. [2024-01-27 15:29:57,303 INFO L231 Difference]: Finished difference. Result has 722 places, 714 transitions, 14520 flow [2024-01-27 15:29:57,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14143, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14520, PETRI_PLACES=722, PETRI_TRANSITIONS=714} [2024-01-27 15:29:57,304 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 699 predicate places. [2024-01-27 15:29:57,304 INFO L495 AbstractCegarLoop]: Abstraction has has 722 places, 714 transitions, 14520 flow [2024-01-27 15:29:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:57,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:57,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:57,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-01-27 15:29:57,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:57,518 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:57,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:57,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1210448072, now seen corresponding path program 132 times [2024-01-27 15:29:57,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:57,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978869990] [2024-01-27 15:29:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:57,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:58,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:58,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978869990] [2024-01-27 15:29:58,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978869990] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:58,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237444664] [2024-01-27 15:29:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:29:58,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:58,042 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:58,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-01-27 15:29:58,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:29:58,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:58,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:29:58,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:58,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:29:58,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:29:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:58,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:58,946 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:29:58,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:29:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:29:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237444664] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:59,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:59,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-01-27 15:29:59,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052495560] [2024-01-27 15:29:59,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:29:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:29:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:29:59,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:29:59,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 714 transitions, 14520 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:59,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:59,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:29:59,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:02,725 INFO L124 PetriNetUnfolderBase]: 3110/6040 cut-off events. [2024-01-27 15:30:02,725 INFO L125 PetriNetUnfolderBase]: For 1033078/1033078 co-relation queries the response was YES. [2024-01-27 15:30:02,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94894 conditions, 6040 events. 3110/6040 cut-off events. For 1033078/1033078 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46903 event pairs, 1439 based on Foata normal form. 12/6050 useless extension candidates. Maximal degree in co-relation 94574. Up to 5532 conditions per place. [2024-01-27 15:30:02,852 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 720 selfloop transitions, 67 changer transitions 8/796 dead transitions. [2024-01-27 15:30:02,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 796 transitions, 18089 flow [2024-01-27 15:30:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:30:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:30:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-01-27 15:30:02,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-01-27 15:30:02,853 INFO L175 Difference]: Start difference. First operand has 722 places, 714 transitions, 14520 flow. Second operand 20 states and 170 transitions. [2024-01-27 15:30:02,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 796 transitions, 18089 flow [2024-01-27 15:30:10,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 796 transitions, 17665 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-01-27 15:30:10,059 INFO L231 Difference]: Finished difference. Result has 735 places, 727 transitions, 14659 flow [2024-01-27 15:30:10,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14118, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14659, PETRI_PLACES=735, PETRI_TRANSITIONS=727} [2024-01-27 15:30:10,060 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 712 predicate places. [2024-01-27 15:30:10,060 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 727 transitions, 14659 flow [2024-01-27 15:30:10,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:10,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:10,060 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:10,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:10,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:10,274 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:10,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1778630966, now seen corresponding path program 133 times [2024-01-27 15:30:10,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:10,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084865383] [2024-01-27 15:30:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:10,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:10,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084865383] [2024-01-27 15:30:10,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084865383] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:10,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731005693] [2024-01-27 15:30:10,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:30:10,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:10,742 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:10,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2024-01-27 15:30:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:11,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:30:11,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:11,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:11,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:30:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:11,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:11,647 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:30:11,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:30:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731005693] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:11,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-01-27 15:30:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069978082] [2024-01-27 15:30:11,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:11,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:30:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:30:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:30:11,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:30:11,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 727 transitions, 14659 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:11,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:11,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:30:11,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:15,510 INFO L124 PetriNetUnfolderBase]: 3145/6127 cut-off events. [2024-01-27 15:30:15,511 INFO L125 PetriNetUnfolderBase]: For 1070913/1070913 co-relation queries the response was YES. [2024-01-27 15:30:15,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96659 conditions, 6127 events. 3145/6127 cut-off events. For 1070913/1070913 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 47943 event pairs, 1251 based on Foata normal form. 12/6137 useless extension candidates. Maximal degree in co-relation 96336. Up to 5052 conditions per place. [2024-01-27 15:30:15,629 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 655 selfloop transitions, 139 changer transitions 9/804 dead transitions. [2024-01-27 15:30:15,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 804 transitions, 18528 flow [2024-01-27 15:30:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:30:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:30:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 180 transitions. [2024-01-27 15:30:15,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37267080745341613 [2024-01-27 15:30:15,630 INFO L175 Difference]: Start difference. First operand has 735 places, 727 transitions, 14659 flow. Second operand 21 states and 180 transitions. [2024-01-27 15:30:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 804 transitions, 18528 flow [2024-01-27 15:30:23,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 804 transitions, 18339 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-01-27 15:30:23,246 INFO L231 Difference]: Finished difference. Result has 747 places, 730 transitions, 15063 flow [2024-01-27 15:30:23,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14470, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15063, PETRI_PLACES=747, PETRI_TRANSITIONS=730} [2024-01-27 15:30:23,247 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 724 predicate places. [2024-01-27 15:30:23,247 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 730 transitions, 15063 flow [2024-01-27 15:30:23,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:23,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:23,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:23,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2024-01-27 15:30:23,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:23,453 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:23,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2134388594, now seen corresponding path program 134 times [2024-01-27 15:30:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:23,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532064046] [2024-01-27 15:30:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532064046] [2024-01-27 15:30:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532064046] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861726734] [2024-01-27 15:30:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:30:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:24,644 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:24,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-01-27 15:30:25,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:30:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:25,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-27 15:30:25,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:25,581 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:30:25,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-27 15:30:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:30:25,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:25,877 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:30:25,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:30:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861726734] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:25,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:25,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 11] total 39 [2024-01-27 15:30:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596031119] [2024-01-27 15:30:25,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:25,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:30:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:30:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2024-01-27 15:30:25,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:30:25,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 730 transitions, 15063 flow. Second operand has 39 states, 39 states have (on average 4.666666666666667) internal successors, (182), 39 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:25,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:30:25,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:30,288 INFO L124 PetriNetUnfolderBase]: 3159/6163 cut-off events. [2024-01-27 15:30:30,288 INFO L125 PetriNetUnfolderBase]: For 1102816/1102816 co-relation queries the response was YES. [2024-01-27 15:30:30,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98292 conditions, 6163 events. 3159/6163 cut-off events. For 1102816/1102816 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 48239 event pairs, 913 based on Foata normal form. 12/6173 useless extension candidates. Maximal degree in co-relation 97966. Up to 5291 conditions per place. [2024-01-27 15:30:30,407 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 660 selfloop transitions, 143 changer transitions 5/809 dead transitions. [2024-01-27 15:30:30,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 809 transitions, 19476 flow [2024-01-27 15:30:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:30:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:30:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 235 transitions. [2024-01-27 15:30:30,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30051150895140666 [2024-01-27 15:30:30,409 INFO L175 Difference]: Start difference. First operand has 747 places, 730 transitions, 15063 flow. Second operand 34 states and 235 transitions. [2024-01-27 15:30:30,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 809 transitions, 19476 flow [2024-01-27 15:30:39,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 809 transitions, 18927 flow, removed 151 selfloop flow, removed 16 redundant places. [2024-01-27 15:30:39,650 INFO L231 Difference]: Finished difference. Result has 771 places, 743 transitions, 15817 flow [2024-01-27 15:30:39,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14577, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15817, PETRI_PLACES=771, PETRI_TRANSITIONS=743} [2024-01-27 15:30:39,651 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 748 predicate places. [2024-01-27 15:30:39,651 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 743 transitions, 15817 flow [2024-01-27 15:30:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.666666666666667) internal successors, (182), 39 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:39,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:39,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:39,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:39,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:39,852 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:39,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1924995036, now seen corresponding path program 135 times [2024-01-27 15:30:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123806211] [2024-01-27 15:30:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:39,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123806211] [2024-01-27 15:30:40,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123806211] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460552579] [2024-01-27 15:30:40,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:30:40,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:40,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:40,293 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:40,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-01-27 15:30:40,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:30:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:40,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-27 15:30:40,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:41,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:41,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-27 15:30:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:30:41,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:41,356 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:30:41,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:30:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460552579] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:41,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:41,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2024-01-27 15:30:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377356268] [2024-01-27 15:30:41,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:30:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:30:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:30:41,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:30:41,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 743 transitions, 15817 flow. Second operand has 26 states, 26 states have (on average 5.038461538461538) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:41,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:41,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:30:41,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:45,751 INFO L124 PetriNetUnfolderBase]: 3156/6176 cut-off events. [2024-01-27 15:30:45,751 INFO L125 PetriNetUnfolderBase]: For 1109834/1109834 co-relation queries the response was YES. [2024-01-27 15:30:45,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99250 conditions, 6176 events. 3156/6176 cut-off events. For 1109834/1109834 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 48524 event pairs, 904 based on Foata normal form. 11/6185 useless extension candidates. Maximal degree in co-relation 98915. Up to 5317 conditions per place. [2024-01-27 15:30:45,869 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 700 selfloop transitions, 124 changer transitions 22/847 dead transitions. [2024-01-27 15:30:45,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 847 transitions, 20882 flow [2024-01-27 15:30:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:30:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:30:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 244 transitions. [2024-01-27 15:30:45,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37888198757763975 [2024-01-27 15:30:45,871 INFO L175 Difference]: Start difference. First operand has 771 places, 743 transitions, 15817 flow. Second operand 28 states and 244 transitions. [2024-01-27 15:30:45,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 847 transitions, 20882 flow [2024-01-27 15:30:54,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 847 transitions, 19876 flow, removed 413 selfloop flow, removed 22 redundant places. [2024-01-27 15:30:54,690 INFO L231 Difference]: Finished difference. Result has 781 places, 747 transitions, 15709 flow [2024-01-27 15:30:54,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14951, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=15709, PETRI_PLACES=781, PETRI_TRANSITIONS=747} [2024-01-27 15:30:54,701 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 758 predicate places. [2024-01-27 15:30:54,701 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 747 transitions, 15709 flow [2024-01-27 15:30:54,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.038461538461538) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:54,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:54,701 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:54,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:54,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2024-01-27 15:30:54,915 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:54,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash -516831118, now seen corresponding path program 136 times [2024-01-27 15:30:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:54,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757045460] [2024-01-27 15:30:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:55,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757045460] [2024-01-27 15:30:55,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757045460] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68394767] [2024-01-27 15:30:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:30:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:55,455 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:55,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2024-01-27 15:30:56,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:30:56,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:56,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:30:56,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:56,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:30:56,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:30:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:56,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:56,445 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:30:56,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-27 15:30:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:30:56,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68394767] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:56,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:56,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-01-27 15:30:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156524370] [2024-01-27 15:30:56,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:56,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:30:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:30:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:30:56,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:30:56,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 747 transitions, 15709 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:56,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:56,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:30:56,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:00,629 INFO L124 PetriNetUnfolderBase]: 3148/6152 cut-off events. [2024-01-27 15:31:00,630 INFO L125 PetriNetUnfolderBase]: For 1136575/1136575 co-relation queries the response was YES. [2024-01-27 15:31:00,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99162 conditions, 6152 events. 3148/6152 cut-off events. For 1136575/1136575 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48205 event pairs, 1215 based on Foata normal form. 32/6182 useless extension candidates. Maximal degree in co-relation 98824. Up to 4988 conditions per place. [2024-01-27 15:31:00,752 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 676 selfloop transitions, 168 changer transitions 8/853 dead transitions. [2024-01-27 15:31:00,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 853 transitions, 20940 flow [2024-01-27 15:31:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:31:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:31:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 243 transitions. [2024-01-27 15:31:00,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521739130434783 [2024-01-27 15:31:00,753 INFO L175 Difference]: Start difference. First operand has 781 places, 747 transitions, 15709 flow. Second operand 30 states and 243 transitions. [2024-01-27 15:31:00,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 853 transitions, 20940 flow [2024-01-27 15:31:09,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 853 transitions, 20147 flow, removed 250 selfloop flow, removed 28 redundant places. [2024-01-27 15:31:09,020 INFO L231 Difference]: Finished difference. Result has 790 places, 760 transitions, 16218 flow [2024-01-27 15:31:09,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14867, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16218, PETRI_PLACES=790, PETRI_TRANSITIONS=760} [2024-01-27 15:31:09,020 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 767 predicate places. [2024-01-27 15:31:09,020 INFO L495 AbstractCegarLoop]: Abstraction has has 790 places, 760 transitions, 16218 flow [2024-01-27 15:31:09,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:09,021 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:09,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:09,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2024-01-27 15:31:09,235 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:09,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1994193082, now seen corresponding path program 137 times [2024-01-27 15:31:09,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:09,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962397559] [2024-01-27 15:31:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962397559] [2024-01-27 15:31:09,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962397559] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:09,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010844170] [2024-01-27 15:31:09,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:31:09,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:09,726 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:09,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-01-27 15:31:10,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:31:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:10,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:31:10,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:10,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:10,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-27 15:31:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:10,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:10,649 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-27 15:31:10,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-27 15:31:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:10,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010844170] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:10,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:10,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-27 15:31:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684227806] [2024-01-27 15:31:10,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:10,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:31:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:31:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:31:10,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:31:10,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 760 transitions, 16218 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:10,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:10,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:31:10,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:14,705 INFO L124 PetriNetUnfolderBase]: 3129/6126 cut-off events. [2024-01-27 15:31:14,705 INFO L125 PetriNetUnfolderBase]: For 1153324/1153324 co-relation queries the response was YES. [2024-01-27 15:31:14,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100041 conditions, 6126 events. 3129/6126 cut-off events. For 1153324/1153324 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 47979 event pairs, 1464 based on Foata normal form. 8/6132 useless extension candidates. Maximal degree in co-relation 99701. Up to 5646 conditions per place. [2024-01-27 15:31:14,825 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 758 selfloop transitions, 67 changer transitions 10/836 dead transitions. [2024-01-27 15:31:14,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 836 transitions, 20006 flow [2024-01-27 15:31:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:31:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:31:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 198 transitions. [2024-01-27 15:31:14,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-01-27 15:31:14,826 INFO L175 Difference]: Start difference. First operand has 790 places, 760 transitions, 16218 flow. Second operand 24 states and 198 transitions. [2024-01-27 15:31:14,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 836 transitions, 20006 flow [2024-01-27 15:31:24,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 836 transitions, 19155 flow, removed 348 selfloop flow, removed 17 redundant places. [2024-01-27 15:31:24,871 INFO L231 Difference]: Finished difference. Result has 797 places, 759 transitions, 15482 flow [2024-01-27 15:31:24,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=15343, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=15482, PETRI_PLACES=797, PETRI_TRANSITIONS=759} [2024-01-27 15:31:24,871 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 774 predicate places. [2024-01-27 15:31:24,871 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 759 transitions, 15482 flow [2024-01-27 15:31:24,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:24,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:24,872 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:24,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:25,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:25,085 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:25,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash 876676569, now seen corresponding path program 138 times [2024-01-27 15:31:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:25,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055980614] [2024-01-27 15:31:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:25,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:25,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:25,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055980614] [2024-01-27 15:31:25,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055980614] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:25,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076235476] [2024-01-27 15:31:25,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:31:25,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:25,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:25,587 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:25,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-01-27 15:31:26,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:31:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:26,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:31:26,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:26,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:26,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:31:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:26,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:26,567 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:31:26,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:31:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:26,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076235476] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:26,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:26,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-01-27 15:31:26,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533330181] [2024-01-27 15:31:26,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:31:26,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:31:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:31:26,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:31:26,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 759 transitions, 15482 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:26,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:26,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:31:26,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:29,880 INFO L124 PetriNetUnfolderBase]: 3124/6107 cut-off events. [2024-01-27 15:31:29,880 INFO L125 PetriNetUnfolderBase]: For 1129599/1129599 co-relation queries the response was YES. [2024-01-27 15:31:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98258 conditions, 6107 events. 3124/6107 cut-off events. For 1129599/1129599 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 47911 event pairs, 1359 based on Foata normal form. 6/6111 useless extension candidates. Maximal degree in co-relation 97915. Up to 5451 conditions per place. [2024-01-27 15:31:30,155 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 683 selfloop transitions, 97 changer transitions 1/782 dead transitions. [2024-01-27 15:31:30,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 782 transitions, 17599 flow [2024-01-27 15:31:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:31:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:31:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2024-01-27 15:31:30,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715415019762846 [2024-01-27 15:31:30,157 INFO L175 Difference]: Start difference. First operand has 797 places, 759 transitions, 15482 flow. Second operand 11 states and 94 transitions. [2024-01-27 15:31:30,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 782 transitions, 17599 flow [2024-01-27 15:31:38,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 782 transitions, 17129 flow, removed 83 selfloop flow, removed 50 redundant places. [2024-01-27 15:31:38,901 INFO L231 Difference]: Finished difference. Result has 757 places, 760 transitions, 15290 flow [2024-01-27 15:31:38,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=15016, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15290, PETRI_PLACES=757, PETRI_TRANSITIONS=760} [2024-01-27 15:31:38,902 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 734 predicate places. [2024-01-27 15:31:38,902 INFO L495 AbstractCegarLoop]: Abstraction has has 757 places, 760 transitions, 15290 flow [2024-01-27 15:31:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:38,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:38,902 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:38,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:39,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2024-01-27 15:31:39,115 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:39,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1193528847, now seen corresponding path program 139 times [2024-01-27 15:31:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:39,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088452030] [2024-01-27 15:31:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:40,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088452030] [2024-01-27 15:31:40,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088452030] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688363007] [2024-01-27 15:31:40,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:31:40,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:40,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:40,245 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:40,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2024-01-27 15:31:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:40,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:31:40,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:41,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:41,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-27 15:31:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:41,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:41,299 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:31:41,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:31:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688363007] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:41,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:41,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-01-27 15:31:41,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246722897] [2024-01-27 15:31:41,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:41,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:31:41,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:31:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:31:41,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:31:41,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 760 transitions, 15290 flow. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:41,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:41,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:31:41,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:44,990 INFO L124 PetriNetUnfolderBase]: 3122/6105 cut-off events. [2024-01-27 15:31:44,990 INFO L125 PetriNetUnfolderBase]: For 1116735/1116735 co-relation queries the response was YES. [2024-01-27 15:31:45,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97721 conditions, 6105 events. 3122/6105 cut-off events. For 1116735/1116735 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 48016 event pairs, 1058 based on Foata normal form. 2/6105 useless extension candidates. Maximal degree in co-relation 97408. Up to 4252 conditions per place. [2024-01-27 15:31:45,102 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 572 selfloop transitions, 215 changer transitions 7/795 dead transitions. [2024-01-27 15:31:45,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 795 transitions, 17855 flow [2024-01-27 15:31:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:31:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:31:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 161 transitions. [2024-01-27 15:31:45,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-01-27 15:31:45,104 INFO L175 Difference]: Start difference. First operand has 757 places, 760 transitions, 15290 flow. Second operand 23 states and 161 transitions. [2024-01-27 15:31:45,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 795 transitions, 17855 flow [2024-01-27 15:31:52,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 795 transitions, 17573 flow, removed 44 selfloop flow, removed 10 redundant places. [2024-01-27 15:31:52,598 INFO L231 Difference]: Finished difference. Result has 770 places, 759 transitions, 15431 flow [2024-01-27 15:31:52,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14994, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15431, PETRI_PLACES=770, PETRI_TRANSITIONS=759} [2024-01-27 15:31:52,599 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 747 predicate places. [2024-01-27 15:31:52,599 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 759 transitions, 15431 flow [2024-01-27 15:31:52,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:52,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:52,599 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:52,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2024-01-27 15:31:52,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2024-01-27 15:31:52,812 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:52,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1985041895, now seen corresponding path program 140 times [2024-01-27 15:31:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148841452] [2024-01-27 15:31:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:31:53,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148841452] [2024-01-27 15:31:53,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148841452] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900800402] [2024-01-27 15:31:53,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:31:53,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:53,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:53,647 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:53,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2024-01-27 15:31:54,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:31:54,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:54,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:31:54,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:54,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:54,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:31:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:31:54,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:54,562 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:31:54,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-27 15:31:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:31:54,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900800402] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:54,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:54,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-01-27 15:31:54,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293667824] [2024-01-27 15:31:54,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:54,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:31:54,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:54,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:31:54,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:31:54,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:31:54,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 759 transitions, 15431 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:54,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:54,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:31:54,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:58,210 INFO L124 PetriNetUnfolderBase]: 3138/6150 cut-off events. [2024-01-27 15:31:58,210 INFO L125 PetriNetUnfolderBase]: For 1163203/1163203 co-relation queries the response was YES. [2024-01-27 15:31:58,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99075 conditions, 6150 events. 3138/6150 cut-off events. For 1163203/1163203 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 48350 event pairs, 1463 based on Foata normal form. 24/6172 useless extension candidates. Maximal degree in co-relation 98760. Up to 5637 conditions per place. [2024-01-27 15:31:58,322 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 709 selfloop transitions, 91 changer transitions 2/803 dead transitions. [2024-01-27 15:31:58,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 803 transitions, 18004 flow [2024-01-27 15:31:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:31:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:31:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 170 transitions. [2024-01-27 15:31:58,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359683794466403 [2024-01-27 15:31:58,324 INFO L175 Difference]: Start difference. First operand has 770 places, 759 transitions, 15431 flow. Second operand 22 states and 170 transitions. [2024-01-27 15:31:58,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 803 transitions, 18004 flow [2024-01-27 15:32:05,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 803 transitions, 17532 flow, removed 19 selfloop flow, removed 21 redundant places. [2024-01-27 15:32:05,609 INFO L231 Difference]: Finished difference. Result has 771 places, 761 transitions, 15366 flow [2024-01-27 15:32:05,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14948, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15366, PETRI_PLACES=771, PETRI_TRANSITIONS=761} [2024-01-27 15:32:05,610 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 748 predicate places. [2024-01-27 15:32:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 761 transitions, 15366 flow [2024-01-27 15:32:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:05,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:05,610 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:05,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:05,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2024-01-27 15:32:05,824 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:05,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 544144667, now seen corresponding path program 141 times [2024-01-27 15:32:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:05,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094714123] [2024-01-27 15:32:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:32:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094714123] [2024-01-27 15:32:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094714123] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984008735] [2024-01-27 15:32:06,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:32:06,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:06,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:06,624 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:32:06,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2024-01-27 15:32:07,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:32:07,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:07,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-27 15:32:07,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:07,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:07,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-27 15:32:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:32:07,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:07,767 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-27 15:32:07,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-27 15:32:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984008735] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:07,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 32 [2024-01-27 15:32:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329450729] [2024-01-27 15:32:07,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:07,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:32:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:32:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:32:07,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:32:07,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 761 transitions, 15366 flow. Second operand has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:07,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:07,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:32:07,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:12,298 INFO L124 PetriNetUnfolderBase]: 3259/6394 cut-off events. [2024-01-27 15:32:12,298 INFO L125 PetriNetUnfolderBase]: For 1292345/1292345 co-relation queries the response was YES. [2024-01-27 15:32:12,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105840 conditions, 6394 events. 3259/6394 cut-off events. For 1292345/1292345 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 50653 event pairs, 1418 based on Foata normal form. 46/6438 useless extension candidates. Maximal degree in co-relation 105524. Up to 5577 conditions per place. [2024-01-27 15:32:12,419 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 778 selfloop transitions, 126 changer transitions 5/910 dead transitions. [2024-01-27 15:32:12,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 910 transitions, 22475 flow [2024-01-27 15:32:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:32:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:32:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 313 transitions. [2024-01-27 15:32:12,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35812356979405036 [2024-01-27 15:32:12,420 INFO L175 Difference]: Start difference. First operand has 771 places, 761 transitions, 15366 flow. Second operand 38 states and 313 transitions. [2024-01-27 15:32:12,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 910 transitions, 22475 flow [2024-01-27 15:32:20,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 910 transitions, 22163 flow, removed 94 selfloop flow, removed 19 redundant places. [2024-01-27 15:32:20,948 INFO L231 Difference]: Finished difference. Result has 799 places, 795 transitions, 18009 flow [2024-01-27 15:32:20,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=15072, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=18009, PETRI_PLACES=799, PETRI_TRANSITIONS=795} [2024-01-27 15:32:20,948 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 776 predicate places. [2024-01-27 15:32:20,949 INFO L495 AbstractCegarLoop]: Abstraction has has 799 places, 795 transitions, 18009 flow [2024-01-27 15:32:20,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:20,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:20,949 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:20,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:21,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:21,162 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:21,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1839253529, now seen corresponding path program 142 times [2024-01-27 15:32:21,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:21,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308956862] [2024-01-27 15:32:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:21,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308956862] [2024-01-27 15:32:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308956862] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611882843] [2024-01-27 15:32:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:32:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:21,717 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:32:21,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2024-01-27 15:32:22,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:32:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:22,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:32:22,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:22,560 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:32:22,560 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 34 treesize of output 19 [2024-01-27 15:32:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:22,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:22,798 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-27 15:32:22,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-27 15:32:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:32:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611882843] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:22,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 27 [2024-01-27 15:32:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193444735] [2024-01-27 15:32:22,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:32:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:32:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:32:22,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:32:22,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 795 transitions, 18009 flow. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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 15:32:22,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:22,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:32:22,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand