./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x6.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/bench-exp2x6.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 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:14:27,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:14:27,419 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:14:27,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:14:27,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:14:27,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:14:27,448 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:14:27,449 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:14:27,449 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:14:27,452 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:14:27,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:14:27,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:14:27,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:14:27,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:14:27,454 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:14:27,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:14:27,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:14:27,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:14:27,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:14:27,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:14:27,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:14:27,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:14:27,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:14:27,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:14:27,457 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:14:27,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:14:27,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:14:27,457 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:14:27,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:14:27,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:14:27,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:14:27,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:14:27,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:27,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:14:27,460 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:14:27,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:14:27,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:14:27,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:14:27,461 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:14:27,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:14:27,461 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:14:27,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:14:27,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:14:27,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 [2024-01-27 15:14:27,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:14:27,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:14:27,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:14:27,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:14:27,700 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:14:27,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x6.wvr.c [2024-01-27 15:14:28,724 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:14:28,853 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:14:28,854 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x6.wvr.c [2024-01-27 15:14:28,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c046f90e2/1f6bbe2c68d04177bd3ccd923d446810/FLAG8f47ac457 [2024-01-27 15:14:28,870 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c046f90e2/1f6bbe2c68d04177bd3ccd923d446810 [2024-01-27 15:14:28,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:14:28,872 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:14:28,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:28,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:14:28,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:14:28,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:28" (1/1) ... [2024-01-27 15:14:28,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1187864e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:28, skipping insertion in model container [2024-01-27 15:14:28,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:28" (1/1) ... [2024-01-27 15:14:28,898 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:14:29,054 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/bench-exp2x6.wvr.c[2505,2518] [2024-01-27 15:14:29,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:29,071 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:14:29,101 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/bench-exp2x6.wvr.c[2505,2518] [2024-01-27 15:14:29,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:29,115 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:14:29,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29 WrapperNode [2024-01-27 15:14:29,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:29,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:29,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:14:29,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:14:29,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,142 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2024-01-27 15:14:29,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:29,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:14:29,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:14:29,145 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:14:29,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,174 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:14:29,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,183 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,184 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,185 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:14:29,186 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:14:29,186 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:14:29,186 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:14:29,187 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (1/1) ... [2024-01-27 15:14:29,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:29,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:29,210 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 15:14:29,212 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 15:14:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:14:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:14:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:14:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:14:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:14:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:14:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:14:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 15:14:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 15:14:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:14:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:14:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:14:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:14:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:14:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:14:29,247 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 15:14:29,354 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:14:29,356 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:14:29,545 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:14:29,545 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:14:29,683 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:14:29,683 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:14:29,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:29 BoogieIcfgContainer [2024-01-27 15:14:29,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:14:29,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:14:29,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:14:29,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:14:29,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:14:28" (1/3) ... [2024-01-27 15:14:29,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542a3c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:29, skipping insertion in model container [2024-01-27 15:14:29,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:29" (2/3) ... [2024-01-27 15:14:29,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542a3c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:29, skipping insertion in model container [2024-01-27 15:14:29,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:29" (3/3) ... [2024-01-27 15:14:29,690 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2024-01-27 15:14:29,696 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:14:29,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:14:29,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:14:29,702 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:14:29,740 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:14:29,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 35 transitions, 98 flow [2024-01-27 15:14:29,799 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-01-27 15:14:29,800 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:14:29,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 31 events. 4/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-01-27 15:14:29,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 35 transitions, 98 flow [2024-01-27 15:14:29,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 30 transitions, 84 flow [2024-01-27 15:14:29,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:14:29,832 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;@3ea00148, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:14:29,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:14:29,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:14:29,857 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-27 15:14:29,857 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:14:29,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:29,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:29,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:29,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1850179278, now seen corresponding path program 1 times [2024-01-27 15:14:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953204108] [2024-01-27 15:14:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:30,280 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 15:14:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953204108] [2024-01-27 15:14:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953204108] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:30,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:30,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:14:30,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378540361] [2024-01-27 15:14:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:30,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:14:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:14:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:14:30,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:30,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:30,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:30,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:30,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:30,560 INFO L124 PetriNetUnfolderBase]: 1537/1955 cut-off events. [2024-01-27 15:14:30,560 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-01-27 15:14:30,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1955 events. 1537/1955 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6383 event pairs, 141 based on Foata normal form. 1/1140 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2024-01-27 15:14:30,576 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 41 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-01-27 15:14:30,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 243 flow [2024-01-27 15:14:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:14:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:14:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-01-27 15:14:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-01-27 15:14:30,587 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 84 flow. Second operand 3 states and 75 transitions. [2024-01-27 15:14:30,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 243 flow [2024-01-27 15:14:30,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:14:30,595 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 101 flow [2024-01-27 15:14:30,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-01-27 15:14:30,599 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2024-01-27 15:14:30,599 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 101 flow [2024-01-27 15:14:30,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:30,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:30,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:14:30,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:30,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 205473119, now seen corresponding path program 1 times [2024-01-27 15:14:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960793925] [2024-01-27 15:14:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960793925] [2024-01-27 15:14:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960793925] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:30,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:30,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:30,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259084403] [2024-01-27 15:14:30,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:30,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:30,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:30,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:30,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:30,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:30,972 INFO L124 PetriNetUnfolderBase]: 1837/2362 cut-off events. [2024-01-27 15:14:30,973 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2024-01-27 15:14:30,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 2362 events. 1837/2362 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8356 event pairs, 138 based on Foata normal form. 34/2396 useless extension candidates. Maximal degree in co-relation 1437. Up to 964 conditions per place. [2024-01-27 15:14:30,985 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-01-27 15:14:30,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 87 transitions, 415 flow [2024-01-27 15:14:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-01-27 15:14:30,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914285714285714 [2024-01-27 15:14:30,990 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 101 flow. Second operand 5 states and 121 transitions. [2024-01-27 15:14:30,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 87 transitions, 415 flow [2024-01-27 15:14:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 87 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:31,017 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 161 flow [2024-01-27 15:14:31,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2024-01-27 15:14:31,018 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-01-27 15:14:31,018 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 161 flow [2024-01-27 15:14:31,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:31,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:31,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:31,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:14:31,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:31,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash -693306653, now seen corresponding path program 1 times [2024-01-27 15:14:31,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:31,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728390799] [2024-01-27 15:14:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:31,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728390799] [2024-01-27 15:14:31,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728390799] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562029331] [2024-01-27 15:14:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:31,176 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 15:14:31,206 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 15:14:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:31,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:14:31,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:31,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:31,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562029331] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:31,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:31,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-27 15:14:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577003803] [2024-01-27 15:14:31,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:14:31,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:31,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:31,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:31,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:31,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:31,718 INFO L124 PetriNetUnfolderBase]: 2211/2949 cut-off events. [2024-01-27 15:14:31,718 INFO L125 PetriNetUnfolderBase]: For 3599/3599 co-relation queries the response was YES. [2024-01-27 15:14:31,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8999 conditions, 2949 events. 2211/2949 cut-off events. For 3599/3599 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12024 event pairs, 330 based on Foata normal form. 80/3025 useless extension candidates. Maximal degree in co-relation 3490. Up to 1265 conditions per place. [2024-01-27 15:14:31,731 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 90 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2024-01-27 15:14:31,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 103 transitions, 615 flow [2024-01-27 15:14:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-01-27 15:14:31,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-01-27 15:14:31,735 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 161 flow. Second operand 5 states and 119 transitions. [2024-01-27 15:14:31,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 103 transitions, 615 flow [2024-01-27 15:14:31,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 103 transitions, 615 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:14:31,740 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 216 flow [2024-01-27 15:14:31,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-01-27 15:14:31,741 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2024-01-27 15:14:31,741 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 216 flow [2024-01-27 15:14:31,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:31,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:31,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:31,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:31,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:31,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:31,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash -750387849, now seen corresponding path program 2 times [2024-01-27 15:14:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:31,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45217800] [2024-01-27 15:14:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:32,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:32,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45217800] [2024-01-27 15:14:32,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45217800] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:32,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:32,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:32,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566696890] [2024-01-27 15:14:32,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:32,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:32,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:32,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:32,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:32,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:32,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:32,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:32,279 INFO L124 PetriNetUnfolderBase]: 2111/2831 cut-off events. [2024-01-27 15:14:32,279 INFO L125 PetriNetUnfolderBase]: For 4787/4803 co-relation queries the response was YES. [2024-01-27 15:14:32,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10429 conditions, 2831 events. 2111/2831 cut-off events. For 4787/4803 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11771 event pairs, 435 based on Foata normal form. 108/2939 useless extension candidates. Maximal degree in co-relation 5299. Up to 1605 conditions per place. [2024-01-27 15:14:32,294 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 90 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-01-27 15:14:32,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 105 transitions, 677 flow [2024-01-27 15:14:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-01-27 15:14:32,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914285714285714 [2024-01-27 15:14:32,296 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 216 flow. Second operand 5 states and 121 transitions. [2024-01-27 15:14:32,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 105 transitions, 677 flow [2024-01-27 15:14:32,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 105 transitions, 677 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:14:32,302 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 270 flow [2024-01-27 15:14:32,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-01-27 15:14:32,302 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2024-01-27 15:14:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 270 flow [2024-01-27 15:14:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:32,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:32,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:32,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:14:32,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:32,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 975604760, now seen corresponding path program 1 times [2024-01-27 15:14:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:32,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350136086] [2024-01-27 15:14:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:32,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:32,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350136086] [2024-01-27 15:14:32,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350136086] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:32,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:32,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:32,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667924046] [2024-01-27 15:14:32,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:32,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:32,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:32,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:32,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:32,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:32,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:32,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:32,624 INFO L124 PetriNetUnfolderBase]: 2045/2752 cut-off events. [2024-01-27 15:14:32,625 INFO L125 PetriNetUnfolderBase]: For 7530/7534 co-relation queries the response was YES. [2024-01-27 15:14:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11166 conditions, 2752 events. 2045/2752 cut-off events. For 7530/7534 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11551 event pairs, 165 based on Foata normal form. 67/2819 useless extension candidates. Maximal degree in co-relation 5677. Up to 1169 conditions per place. [2024-01-27 15:14:32,645 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 91 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2024-01-27 15:14:32,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 104 transitions, 701 flow [2024-01-27 15:14:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-01-27 15:14:32,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-01-27 15:14:32,646 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 270 flow. Second operand 5 states and 120 transitions. [2024-01-27 15:14:32,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 104 transitions, 701 flow [2024-01-27 15:14:32,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 104 transitions, 692 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:32,654 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 275 flow [2024-01-27 15:14:32,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-01-27 15:14:32,656 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2024-01-27 15:14:32,656 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 275 flow [2024-01-27 15:14:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:32,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:32,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:32,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:14:32,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:32,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1939401305, now seen corresponding path program 2 times [2024-01-27 15:14:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036344657] [2024-01-27 15:14:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:32,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:32,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036344657] [2024-01-27 15:14:32,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036344657] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:32,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:32,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344187763] [2024-01-27 15:14:32,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:32,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:32,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:32,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:32,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:32,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:32,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:32,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:32,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:32,990 INFO L124 PetriNetUnfolderBase]: 1843/2482 cut-off events. [2024-01-27 15:14:32,990 INFO L125 PetriNetUnfolderBase]: For 7579/7583 co-relation queries the response was YES. [2024-01-27 15:14:32,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10326 conditions, 2482 events. 1843/2482 cut-off events. For 7579/7583 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9636 event pairs, 99 based on Foata normal form. 39/2517 useless extension candidates. Maximal degree in co-relation 5892. Up to 1018 conditions per place. [2024-01-27 15:14:33,003 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 102 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-01-27 15:14:33,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 118 transitions, 929 flow [2024-01-27 15:14:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-01-27 15:14:33,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685714285714286 [2024-01-27 15:14:33,004 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 275 flow. Second operand 5 states and 117 transitions. [2024-01-27 15:14:33,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 118 transitions, 929 flow [2024-01-27 15:14:33,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 904 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:33,013 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 327 flow [2024-01-27 15:14:33,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-01-27 15:14:33,015 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 21 predicate places. [2024-01-27 15:14:33,015 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 327 flow [2024-01-27 15:14:33,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:33,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:33,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:33,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:14:33,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:33,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash -803453354, now seen corresponding path program 1 times [2024-01-27 15:14:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:33,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593307941] [2024-01-27 15:14:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:33,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:33,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593307941] [2024-01-27 15:14:33,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593307941] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:33,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:33,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358180085] [2024-01-27 15:14:33,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:33,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:33,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:33,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:33,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:33,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:33,326 INFO L124 PetriNetUnfolderBase]: 1801/2440 cut-off events. [2024-01-27 15:14:33,326 INFO L125 PetriNetUnfolderBase]: For 7863/7867 co-relation queries the response was YES. [2024-01-27 15:14:33,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10872 conditions, 2440 events. 1801/2440 cut-off events. For 7863/7867 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9715 event pairs, 75 based on Foata normal form. 43/2479 useless extension candidates. Maximal degree in co-relation 6736. Up to 1137 conditions per place. [2024-01-27 15:14:33,343 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 99 selfloop transitions, 8 changer transitions 4/116 dead transitions. [2024-01-27 15:14:33,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 116 transitions, 917 flow [2024-01-27 15:14:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-01-27 15:14:33,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628571428571428 [2024-01-27 15:14:33,344 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 327 flow. Second operand 5 states and 116 transitions. [2024-01-27 15:14:33,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 116 transitions, 917 flow [2024-01-27 15:14:33,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 116 transitions, 906 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:33,353 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 330 flow [2024-01-27 15:14:33,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-01-27 15:14:33,354 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2024-01-27 15:14:33,354 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 330 flow [2024-01-27 15:14:33,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:33,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:33,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:14:33,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:33,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -527867170, now seen corresponding path program 2 times [2024-01-27 15:14:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579726096] [2024-01-27 15:14:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:33,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:33,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579726096] [2024-01-27 15:14:33,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579726096] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:33,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:33,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565527828] [2024-01-27 15:14:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:33,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:33,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:33,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:33,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:33,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:33,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:33,647 INFO L124 PetriNetUnfolderBase]: 1725/2376 cut-off events. [2024-01-27 15:14:33,648 INFO L125 PetriNetUnfolderBase]: For 8252/8256 co-relation queries the response was YES. [2024-01-27 15:14:33,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10922 conditions, 2376 events. 1725/2376 cut-off events. For 8252/8256 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9853 event pairs, 293 based on Foata normal form. 77/2449 useless extension candidates. Maximal degree in co-relation 6767. Up to 1307 conditions per place. [2024-01-27 15:14:33,661 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 101 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-01-27 15:14:33,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 933 flow [2024-01-27 15:14:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-01-27 15:14:33,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6457142857142857 [2024-01-27 15:14:33,662 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 330 flow. Second operand 5 states and 113 transitions. [2024-01-27 15:14:33,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 933 flow [2024-01-27 15:14:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 920 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:33,669 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 370 flow [2024-01-27 15:14:33,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-01-27 15:14:33,669 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 30 predicate places. [2024-01-27 15:14:33,669 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 370 flow [2024-01-27 15:14:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:14:33,670 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:33,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1630969352, now seen corresponding path program 2 times [2024-01-27 15:14:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547528988] [2024-01-27 15:14:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:33,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547528988] [2024-01-27 15:14:33,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547528988] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768494995] [2024-01-27 15:14:33,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:33,740 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 15:14:33,772 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 15:14:33,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:33,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:14:33,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:33,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:33,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768494995] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:33,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:33,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-27 15:14:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344067256] [2024-01-27 15:14:33,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:33,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:33,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:14:33,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:33,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 370 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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 15:14:33,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:33,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:33,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:34,187 INFO L124 PetriNetUnfolderBase]: 1657/2291 cut-off events. [2024-01-27 15:14:34,187 INFO L125 PetriNetUnfolderBase]: For 8439/8455 co-relation queries the response was YES. [2024-01-27 15:14:34,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11174 conditions, 2291 events. 1657/2291 cut-off events. For 8439/8455 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9641 event pairs, 481 based on Foata normal form. 72/2363 useless extension candidates. Maximal degree in co-relation 9826. Up to 1331 conditions per place. [2024-01-27 15:14:34,199 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 117 selfloop transitions, 8 changer transitions 0/130 dead transitions. [2024-01-27 15:14:34,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 130 transitions, 1118 flow [2024-01-27 15:14:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-01-27 15:14:34,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685714285714286 [2024-01-27 15:14:34,200 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 370 flow. Second operand 5 states and 117 transitions. [2024-01-27 15:14:34,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 130 transitions, 1118 flow [2024-01-27 15:14:34,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 130 transitions, 1060 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:34,207 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 407 flow [2024-01-27 15:14:34,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-01-27 15:14:34,208 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 34 predicate places. [2024-01-27 15:14:34,208 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 407 flow [2024-01-27 15:14:34,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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 15:14:34,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:34,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:34,219 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 15:14:34,419 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,SelfDestructingSolverStorable8 [2024-01-27 15:14:34,420 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:34,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2098550605, now seen corresponding path program 1 times [2024-01-27 15:14:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:34,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752043202] [2024-01-27 15:14:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:34,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:34,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752043202] [2024-01-27 15:14:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752043202] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016379823] [2024-01-27 15:14:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:34,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:34,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:34,851 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 15:14:34,889 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 15:14:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:35,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:14:35,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:55,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:15:00,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016379823] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:00,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:00,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-01-27 15:15:00,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199321789] [2024-01-27 15:15:00,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:15:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:15:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=128, Unknown=1, NotChecked=0, Total=182 [2024-01-27 15:15:00,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:15:00,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 407 flow. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:00,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:00,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:15:00,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:08,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:16,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:24,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:27,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:32,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:40,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:44,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:46,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:48,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:53,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:15:58,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:03,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:06,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:16:06,827 INFO L124 PetriNetUnfolderBase]: 3045/4206 cut-off events. [2024-01-27 15:16:06,827 INFO L125 PetriNetUnfolderBase]: For 15047/15047 co-relation queries the response was YES. [2024-01-27 15:16:06,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20604 conditions, 4206 events. 3045/4206 cut-off events. For 15047/15047 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19056 event pairs, 347 based on Foata normal form. 3/4209 useless extension candidates. Maximal degree in co-relation 18337. Up to 2341 conditions per place. [2024-01-27 15:16:06,862 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 215 selfloop transitions, 97 changer transitions 10/327 dead transitions. [2024-01-27 15:16:06,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 327 transitions, 2791 flow [2024-01-27 15:16:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:16:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:16:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 371 transitions. [2024-01-27 15:16:06,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-01-27 15:16:06,864 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 407 flow. Second operand 16 states and 371 transitions. [2024-01-27 15:16:06,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 327 transitions, 2791 flow [2024-01-27 15:16:06,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 327 transitions, 2702 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-01-27 15:16:06,894 INFO L231 Difference]: Finished difference. Result has 94 places, 154 transitions, 1594 flow [2024-01-27 15:16:06,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1594, PETRI_PLACES=94, PETRI_TRANSITIONS=154} [2024-01-27 15:16:06,895 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 55 predicate places. [2024-01-27 15:16:06,895 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 154 transitions, 1594 flow [2024-01-27 15:16:06,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:16:06,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:06,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:06,907 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 15:16:07,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:07,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:16:07,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2080468007, now seen corresponding path program 1 times [2024-01-27 15:16:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:07,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547675574] [2024-01-27 15:16:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:16:07,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547675574] [2024-01-27 15:16:07,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547675574] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565130942] [2024-01-27 15:16:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:07,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:07,471 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 15:16:07,473 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 15:16:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:07,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:16:07,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:30,020 WARN L293 SmtUtils]: Spent 12.36s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:19:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:19:03,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:19:25,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565130942] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:25,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:25,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-01-27 15:19:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046798833] [2024-01-27 15:19:25,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:19:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:19:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=168, Unknown=14, NotChecked=0, Total=240 [2024-01-27 15:19:25,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:19:25,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 154 transitions, 1594 flow. Second operand has 16 states, 16 states have (on average 12.8125) internal successors, (205), 16 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:25,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:25,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:19:25,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:33,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:19:45,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:19:49,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:19:53,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:06,382 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 41 DAG size of output: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:20:10,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:28,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:32,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:33,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:36,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:20:39,255 INFO L124 PetriNetUnfolderBase]: 5061/7036 cut-off events. [2024-01-27 15:20:39,255 INFO L125 PetriNetUnfolderBase]: For 31121/31121 co-relation queries the response was YES. [2024-01-27 15:20:39,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39044 conditions, 7036 events. 5061/7036 cut-off events. For 31121/31121 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35624 event pairs, 295 based on Foata normal form. 25/7061 useless extension candidates. Maximal degree in co-relation 37596. Up to 4602 conditions per place. [2024-01-27 15:20:39,301 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 346 selfloop transitions, 100 changer transitions 18/469 dead transitions. [2024-01-27 15:20:39,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 469 transitions, 4482 flow [2024-01-27 15:20:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:20:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:20:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 410 transitions. [2024-01-27 15:20:39,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7321428571428571 [2024-01-27 15:20:39,303 INFO L175 Difference]: Start difference. First operand has 94 places, 154 transitions, 1594 flow. Second operand 16 states and 410 transitions. [2024-01-27 15:20:39,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 469 transitions, 4482 flow [2024-01-27 15:20:39,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 469 transitions, 4233 flow, removed 122 selfloop flow, removed 1 redundant places. [2024-01-27 15:20:39,480 INFO L231 Difference]: Finished difference. Result has 118 places, 252 transitions, 2684 flow [2024-01-27 15:20:39,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2684, PETRI_PLACES=118, PETRI_TRANSITIONS=252} [2024-01-27 15:20:39,480 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 79 predicate places. [2024-01-27 15:20:39,481 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 252 transitions, 2684 flow [2024-01-27 15:20:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.8125) internal successors, (205), 16 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:39,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:39,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:39,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:39,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:39,693 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:20:39,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:39,694 INFO L85 PathProgramCache]: Analyzing trace with hash 179305585, now seen corresponding path program 2 times [2024-01-27 15:20:39,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:39,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115731479] [2024-01-27 15:20:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:39,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:20:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115731479] [2024-01-27 15:20:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115731479] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417824512] [2024-01-27 15:20:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:39,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:39,971 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 15:20:39,976 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 15:20:40,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:40,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:20:40,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:14,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:21:15,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417824512] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:15,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:15,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-01-27 15:21:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113096048] [2024-01-27 15:21:15,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:15,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:21:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:21:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=158, Unknown=3, NotChecked=0, Total=240 [2024-01-27 15:21:15,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:21:15,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 252 transitions, 2684 flow. Second operand has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:15,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:15,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:21:15,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:21,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:25,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:27,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:28,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:33,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:37,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:42,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:44,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:47,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:53,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:21:57,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:01,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:02,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:07,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:09,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:16,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:18,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:24,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:27,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:29,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:30,163 INFO L124 PetriNetUnfolderBase]: 6740/9359 cut-off events. [2024-01-27 15:22:30,164 INFO L125 PetriNetUnfolderBase]: For 59153/59153 co-relation queries the response was YES. [2024-01-27 15:22:30,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56004 conditions, 9359 events. 6740/9359 cut-off events. For 59153/59153 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 48972 event pairs, 551 based on Foata normal form. 39/9384 useless extension candidates. Maximal degree in co-relation 54660. Up to 7175 conditions per place. [2024-01-27 15:22:30,231 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 401 selfloop transitions, 140 changer transitions 36/582 dead transitions. [2024-01-27 15:22:30,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 582 transitions, 6420 flow [2024-01-27 15:22:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:22:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:22:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 397 transitions. [2024-01-27 15:22:30,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6672268907563025 [2024-01-27 15:22:30,236 INFO L175 Difference]: Start difference. First operand has 118 places, 252 transitions, 2684 flow. Second operand 17 states and 397 transitions. [2024-01-27 15:22:30,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 582 transitions, 6420 flow [2024-01-27 15:22:30,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 582 transitions, 6051 flow, removed 182 selfloop flow, removed 1 redundant places. [2024-01-27 15:22:30,395 INFO L231 Difference]: Finished difference. Result has 143 places, 385 transitions, 4457 flow [2024-01-27 15:22:30,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4457, PETRI_PLACES=143, PETRI_TRANSITIONS=385} [2024-01-27 15:22:30,396 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 104 predicate places. [2024-01-27 15:22:30,396 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 385 transitions, 4457 flow [2024-01-27 15:22:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:30,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:30,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:30,421 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 15:22:30,617 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,SelfDestructingSolverStorable11 [2024-01-27 15:22:30,617 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:22:30,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1858711913, now seen corresponding path program 2 times [2024-01-27 15:22:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497708723] [2024-01-27 15:22:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:30,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497708723] [2024-01-27 15:22:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497708723] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:30,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610679096] [2024-01-27 15:22:30,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:22:30,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:31,000 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 15:22:31,002 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 15:22:31,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:22:31,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:31,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:22:31,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:32,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:22:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610679096] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:32,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-01-27 15:22:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821312611] [2024-01-27 15:22:32,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:32,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:22:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:22:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:22:32,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:22:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 385 transitions, 4457 flow. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:22:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:39,760 WARN L293 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 71 DAG size of output: 24 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:22:42,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:22:51,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:18,353 WARN L293 SmtUtils]: Spent 11.59s on a formula simplification. DAG size of input: 84 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:23:22,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:26,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:30,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:34,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:38,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:42,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:46,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:50,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:23:55,723 INFO L124 PetriNetUnfolderBase]: 8604/12072 cut-off events. [2024-01-27 15:23:55,724 INFO L125 PetriNetUnfolderBase]: For 91132/91132 co-relation queries the response was YES. [2024-01-27 15:23:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76130 conditions, 12072 events. 8604/12072 cut-off events. For 91132/91132 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 67081 event pairs, 737 based on Foata normal form. 4/12062 useless extension candidates. Maximal degree in co-relation 75282. Up to 9300 conditions per place. [2024-01-27 15:23:55,824 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 608 selfloop transitions, 70 changer transitions 18/701 dead transitions. [2024-01-27 15:23:55,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 701 transitions, 8223 flow [2024-01-27 15:23:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:23:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:23:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 463 transitions. [2024-01-27 15:23:55,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.734920634920635 [2024-01-27 15:23:55,828 INFO L175 Difference]: Start difference. First operand has 143 places, 385 transitions, 4457 flow. Second operand 18 states and 463 transitions. [2024-01-27 15:23:55,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 701 transitions, 8223 flow [2024-01-27 15:23:56,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 701 transitions, 7752 flow, removed 233 selfloop flow, removed 1 redundant places. [2024-01-27 15:23:56,266 INFO L231 Difference]: Finished difference. Result has 167 places, 452 transitions, 5214 flow [2024-01-27 15:23:56,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5214, PETRI_PLACES=167, PETRI_TRANSITIONS=452} [2024-01-27 15:23:56,267 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 128 predicate places. [2024-01-27 15:23:56,267 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 452 transitions, 5214 flow [2024-01-27 15:23:56,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:56,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:56,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:56,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:56,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:56,481 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:23:56,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1522613852, now seen corresponding path program 3 times [2024-01-27 15:23:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:56,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393157352] [2024-01-27 15:23:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:56,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:23:56,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393157352] [2024-01-27 15:23:56,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393157352] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131007278] [2024-01-27 15:23:56,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:23:56,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:56,606 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 15:23:56,644 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 15:23:56,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:23:56,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:56,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:23:56,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:02,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:02,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131007278] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:02,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:02,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 14 [2024-01-27 15:24:02,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477184575] [2024-01-27 15:24:02,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:02,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:24:02,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:24:02,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:24:02,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:24:02,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 452 transitions, 5214 flow. Second operand has 15 states, 15 states have (on average 13.2) internal successors, (198), 15 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:02,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:02,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:24:02,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:06,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:24:10,938 INFO L124 PetriNetUnfolderBase]: 11124/15592 cut-off events. [2024-01-27 15:24:10,938 INFO L125 PetriNetUnfolderBase]: For 171815/171815 co-relation queries the response was YES. [2024-01-27 15:24:11,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104373 conditions, 15592 events. 11124/15592 cut-off events. For 171815/171815 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89828 event pairs, 939 based on Foata normal form. 534/16112 useless extension candidates. Maximal degree in co-relation 103881. Up to 5870 conditions per place. [2024-01-27 15:24:11,164 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 594 selfloop transitions, 176 changer transitions 6/781 dead transitions. [2024-01-27 15:24:11,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 781 transitions, 9767 flow [2024-01-27 15:24:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:24:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:24:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 330 transitions. [2024-01-27 15:24:11,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7252747252747253 [2024-01-27 15:24:11,169 INFO L175 Difference]: Start difference. First operand has 167 places, 452 transitions, 5214 flow. Second operand 13 states and 330 transitions. [2024-01-27 15:24:11,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 781 transitions, 9767 flow [2024-01-27 15:24:11,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 781 transitions, 9304 flow, removed 229 selfloop flow, removed 3 redundant places. [2024-01-27 15:24:11,908 INFO L231 Difference]: Finished difference. Result has 183 places, 467 transitions, 5765 flow [2024-01-27 15:24:11,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5765, PETRI_PLACES=183, PETRI_TRANSITIONS=467} [2024-01-27 15:24:11,909 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-01-27 15:24:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 467 transitions, 5765 flow [2024-01-27 15:24:11,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.2) internal successors, (198), 15 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:11,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:11,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:11,922 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 15:24:12,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:12,112 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:24:12,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash -887702911, now seen corresponding path program 4 times [2024-01-27 15:24:12,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:12,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899121220] [2024-01-27 15:24:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:12,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899121220] [2024-01-27 15:24:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899121220] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987645104] [2024-01-27 15:24:12,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:24:12,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:12,265 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 15:24:12,266 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 15:24:12,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:24:12,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:12,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:24:12,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:33,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987645104] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:05,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:05,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 15 [2024-01-27 15:25:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739507539] [2024-01-27 15:25:05,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:05,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:25:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:25:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=179, Unknown=13, NotChecked=0, Total=240 [2024-01-27 15:25:05,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:25:05,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 467 transitions, 5765 flow. Second operand has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:05,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:05,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:25:05,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:17,445 INFO L124 PetriNetUnfolderBase]: 10478/14591 cut-off events. [2024-01-27 15:25:17,445 INFO L125 PetriNetUnfolderBase]: For 201581/201581 co-relation queries the response was YES. [2024-01-27 15:25:17,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102502 conditions, 14591 events. 10478/14591 cut-off events. For 201581/201581 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 83064 event pairs, 419 based on Foata normal form. 164/14741 useless extension candidates. Maximal degree in co-relation 101662. Up to 5016 conditions per place. [2024-01-27 15:25:17,576 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 683 selfloop transitions, 157 changer transitions 24/869 dead transitions. [2024-01-27 15:25:17,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 869 transitions, 11360 flow [2024-01-27 15:25:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:25:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:25:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 273 transitions. [2024-01-27 15:25:17,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-01-27 15:25:17,578 INFO L175 Difference]: Start difference. First operand has 183 places, 467 transitions, 5765 flow. Second operand 11 states and 273 transitions. [2024-01-27 15:25:17,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 869 transitions, 11360 flow [2024-01-27 15:25:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 869 transitions, 11087 flow, removed 126 selfloop flow, removed 3 redundant places. [2024-01-27 15:25:18,731 INFO L231 Difference]: Finished difference. Result has 192 places, 482 transitions, 6278 flow [2024-01-27 15:25:18,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5496, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6278, PETRI_PLACES=192, PETRI_TRANSITIONS=482} [2024-01-27 15:25:18,733 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 153 predicate places. [2024-01-27 15:25:18,733 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 482 transitions, 6278 flow [2024-01-27 15:25:18,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:18,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:18,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:18,745 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 15:25:18,945 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,SelfDestructingSolverStorable14 [2024-01-27 15:25:18,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:25:18,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash 235643497, now seen corresponding path program 5 times [2024-01-27 15:25:18,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:18,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823332511] [2024-01-27 15:25:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:18,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:19,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823332511] [2024-01-27 15:25:19,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823332511] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107695616] [2024-01-27 15:25:19,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:25:19,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:19,109 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 15:25:19,120 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 15:25:19,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:25:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:19,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:25:19,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:19,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107695616] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:20,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:20,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 15 [2024-01-27 15:25:20,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075448016] [2024-01-27 15:25:20,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:25:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:25:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:25:20,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:25:20,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 482 transitions, 6278 flow. Second operand has 16 states, 16 states have (on average 12.9375) internal successors, (207), 16 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:20,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:20,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:25:20,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:25,801 INFO L124 PetriNetUnfolderBase]: 10870/15129 cut-off events. [2024-01-27 15:25:25,801 INFO L125 PetriNetUnfolderBase]: For 230156/230156 co-relation queries the response was YES. [2024-01-27 15:25:25,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109832 conditions, 15129 events. 10870/15129 cut-off events. For 230156/230156 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 85910 event pairs, 821 based on Foata normal form. 124/15239 useless extension candidates. Maximal degree in co-relation 108961. Up to 6341 conditions per place. [2024-01-27 15:25:25,928 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 581 selfloop transitions, 198 changer transitions 6/790 dead transitions. [2024-01-27 15:25:25,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 790 transitions, 10713 flow [2024-01-27 15:25:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:25:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:25:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 275 transitions. [2024-01-27 15:25:25,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-01-27 15:25:25,930 INFO L175 Difference]: Start difference. First operand has 192 places, 482 transitions, 6278 flow. Second operand 11 states and 275 transitions. [2024-01-27 15:25:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 790 transitions, 10713 flow [2024-01-27 15:25:27,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 790 transitions, 10339 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-01-27 15:25:27,147 INFO L231 Difference]: Finished difference. Result has 200 places, 489 transitions, 6601 flow [2024-01-27 15:25:27,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5818, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6601, PETRI_PLACES=200, PETRI_TRANSITIONS=489} [2024-01-27 15:25:27,147 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 161 predicate places. [2024-01-27 15:25:27,147 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 489 transitions, 6601 flow [2024-01-27 15:25:27,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 16 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:27,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:27,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:27,166 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 15:25:27,359 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,SelfDestructingSolverStorable15 [2024-01-27 15:25:27,359 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:25:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 268863269, now seen corresponding path program 3 times [2024-01-27 15:25:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700917258] [2024-01-27 15:25:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700917258] [2024-01-27 15:25:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700917258] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488113657] [2024-01-27 15:25:27,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:25:27,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:27,478 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 15:25:27,507 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 15:25:27,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:25:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:27,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:25:27,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:28,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:29,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488113657] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:29,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:29,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 15 [2024-01-27 15:25:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813180870] [2024-01-27 15:25:29,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:25:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:25:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:25:29,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:25:29,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 489 transitions, 6601 flow. Second operand has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:29,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:29,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:25:29,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:25:39,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:43,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:48,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:25:49,104 INFO L124 PetriNetUnfolderBase]: 14312/19908 cut-off events. [2024-01-27 15:25:49,104 INFO L125 PetriNetUnfolderBase]: For 359347/359347 co-relation queries the response was YES. [2024-01-27 15:25:49,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151887 conditions, 19908 events. 14312/19908 cut-off events. For 359347/359347 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 112653 event pairs, 289 based on Foata normal form. 294/20188 useless extension candidates. Maximal degree in co-relation 150842. Up to 5905 conditions per place. [2024-01-27 15:25:49,283 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 898 selfloop transitions, 166 changer transitions 52/1121 dead transitions. [2024-01-27 15:25:49,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1121 transitions, 17421 flow [2024-01-27 15:25:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:25:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:25:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 376 transitions. [2024-01-27 15:25:49,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2024-01-27 15:25:49,285 INFO L175 Difference]: Start difference. First operand has 200 places, 489 transitions, 6601 flow. Second operand 16 states and 376 transitions. [2024-01-27 15:25:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1121 transitions, 17421 flow [2024-01-27 15:25:50,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1121 transitions, 16524 flow, removed 220 selfloop flow, removed 5 redundant places. [2024-01-27 15:25:50,994 INFO L231 Difference]: Finished difference. Result has 215 places, 515 transitions, 7119 flow [2024-01-27 15:25:50,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7119, PETRI_PLACES=215, PETRI_TRANSITIONS=515} [2024-01-27 15:25:50,995 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 176 predicate places. [2024-01-27 15:25:50,995 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 515 transitions, 7119 flow [2024-01-27 15:25:50,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:50,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:25:50,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:25:51,009 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 15:25:51,207 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,SelfDestructingSolverStorable16 [2024-01-27 15:25:51,208 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:25:51,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:25:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 722997135, now seen corresponding path program 4 times [2024-01-27 15:25:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:25:51,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933457885] [2024-01-27 15:25:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:25:51,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:25:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:25:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:25:51,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933457885] [2024-01-27 15:25:51,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933457885] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:25:51,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302700559] [2024-01-27 15:25:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:25:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:25:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:25:51,304 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 15:25:51,308 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 15:25:51,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:25:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:25:51,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:25:51,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:25:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:52,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:25:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:25:53,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302700559] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:25:53,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:25:53,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 15 [2024-01-27 15:25:53,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788091776] [2024-01-27 15:25:53,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:25:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:25:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:25:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:25:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:25:53,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:25:53,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 515 transitions, 7119 flow. Second operand has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:25:53,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:25:53,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:25:53,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:01,428 INFO L124 PetriNetUnfolderBase]: 15018/20854 cut-off events. [2024-01-27 15:26:01,428 INFO L125 PetriNetUnfolderBase]: For 375520/375520 co-relation queries the response was YES. [2024-01-27 15:26:01,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166585 conditions, 20854 events. 15018/20854 cut-off events. For 375520/375520 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 119864 event pairs, 1787 based on Foata normal form. 236/21090 useless extension candidates. Maximal degree in co-relation 165516. Up to 7302 conditions per place. [2024-01-27 15:26:01,643 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 660 selfloop transitions, 164 changer transitions 8/837 dead transitions. [2024-01-27 15:26:01,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 837 transitions, 12923 flow [2024-01-27 15:26:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:26:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:26:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-01-27 15:26:01,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-01-27 15:26:01,645 INFO L175 Difference]: Start difference. First operand has 215 places, 515 transitions, 7119 flow. Second operand 11 states and 264 transitions. [2024-01-27 15:26:01,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 837 transitions, 12923 flow [2024-01-27 15:26:04,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 837 transitions, 12777 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-01-27 15:26:04,362 INFO L231 Difference]: Finished difference. Result has 226 places, 525 transitions, 7590 flow [2024-01-27 15:26:04,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6973, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7590, PETRI_PLACES=226, PETRI_TRANSITIONS=525} [2024-01-27 15:26:04,363 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 187 predicate places. [2024-01-27 15:26:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 525 transitions, 7590 flow [2024-01-27 15:26:04,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:04,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:26:04,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:26:04,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:26:04,576 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,SelfDestructingSolverStorable17 [2024-01-27 15:26:04,576 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:26:04,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:26:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1717402647, now seen corresponding path program 5 times [2024-01-27 15:26:04,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:26:04,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457497532] [2024-01-27 15:26:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:26:04,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:26:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:26:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:26:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457497532] [2024-01-27 15:26:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457497532] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:26:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607824400] [2024-01-27 15:26:04,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:26:04,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:26:04,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:26:04,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:26:04,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:26:05,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:26:05,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:26:05,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:26:05,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:26:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:10,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:26:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:26:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607824400] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:26:16,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:26:16,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 16 [2024-01-27 15:26:16,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666193813] [2024-01-27 15:26:16,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:26:16,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:26:16,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:26:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:26:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2024-01-27 15:26:16,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:26:16,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 525 transitions, 7590 flow. Second operand has 17 states, 17 states have (on average 13.0) internal successors, (221), 17 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:26:16,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:26:16,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:26:16,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:26:26,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:26:33,531 WARN L293 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 57 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:26:38,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:26:44,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:26:48,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:10,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:19,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:27:33,546 INFO L124 PetriNetUnfolderBase]: 31527/44844 cut-off events. [2024-01-27 15:27:33,546 INFO L125 PetriNetUnfolderBase]: For 1031753/1031753 co-relation queries the response was YES. [2024-01-27 15:27:34,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381583 conditions, 44844 events. 31527/44844 cut-off events. For 1031753/1031753 co-relation queries the response was YES. Maximal size of possible extension queue 2026. Compared 291687 event pairs, 771 based on Foata normal form. 958/45802 useless extension candidates. Maximal degree in co-relation 379216. Up to 17673 conditions per place. [2024-01-27 15:27:34,411 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 940 selfloop transitions, 651 changer transitions 28/1624 dead transitions. [2024-01-27 15:27:34,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1624 transitions, 26607 flow [2024-01-27 15:27:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:27:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:27:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 685 transitions. [2024-01-27 15:27:34,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6748768472906403 [2024-01-27 15:27:34,413 INFO L175 Difference]: Start difference. First operand has 226 places, 525 transitions, 7590 flow. Second operand 29 states and 685 transitions. [2024-01-27 15:27:34,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1624 transitions, 26607 flow [2024-01-27 15:27:40,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1624 transitions, 26225 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-01-27 15:27:40,248 INFO L231 Difference]: Finished difference. Result has 269 places, 1073 transitions, 20164 flow [2024-01-27 15:27:40,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7297, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20164, PETRI_PLACES=269, PETRI_TRANSITIONS=1073} [2024-01-27 15:27:40,249 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 230 predicate places. [2024-01-27 15:27:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 1073 transitions, 20164 flow [2024-01-27 15:27:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.0) internal successors, (221), 17 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:27:40,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:27:40,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:27:40,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-27 15:27:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:40,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:27:40,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:27:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash 711185314, now seen corresponding path program 6 times [2024-01-27 15:27:40,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:27:40,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548576231] [2024-01-27 15:27:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:27:40,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:27:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:27:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:27:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:27:40,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548576231] [2024-01-27 15:27:40,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548576231] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:27:40,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701207558] [2024-01-27 15:27:40,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:27:40,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:27:40,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:27:40,573 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 15:27:40,574 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 15:27:40,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:27:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:27:40,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:27:40,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:27:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:27:53,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:28:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:28:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701207558] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:28:07,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:28:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 15 [2024-01-27 15:28:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662427123] [2024-01-27 15:28:07,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:28:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:28:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:28:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:28:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=188, Unknown=6, NotChecked=0, Total=240 [2024-01-27 15:28:07,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:28:07,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 1073 transitions, 20164 flow. Second operand has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:28:07,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:28:07,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:28:07,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:28:16,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:28:23,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:28:27,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:28:31,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:28:35,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:28:41,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:28:54,470 INFO L124 PetriNetUnfolderBase]: 33240/47281 cut-off events. [2024-01-27 15:28:54,470 INFO L125 PetriNetUnfolderBase]: For 1409308/1409308 co-relation queries the response was YES. Killed by 15