./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.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/popl20-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:52:58,100 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:52:58,136 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:52:58,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:52:58,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:52:58,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:52:58,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:52:58,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:52:58,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:52:58,177 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:52:58,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:52:58,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:52:58,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:52:58,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:52:58,179 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:52:58,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:52:58,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:52:58,180 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:52:58,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:52:58,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:52:58,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:52:58,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:52:58,182 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:52:58,182 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:52:58,182 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:52:58,183 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:52:58,183 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:52:58,183 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:52:58,184 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:52:58,184 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:52:58,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:52:58,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:52:58,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:52:58,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:52:58,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:52:58,186 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:52:58,186 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:52:58,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:52:58,186 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:52:58,186 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:52:58,187 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:52:58,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:52:58,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:52:58,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-01-27 15:52:58,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:52:58,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:52:58,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:52:58,454 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:52:58,455 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:52:58,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2024-01-27 15:52:59,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:52:59,667 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:52:59,668 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2024-01-27 15:52:59,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/807e0d274/744131e19c064bc5a5ecc9f128e3446c/FLAGb5e45a20b [2024-01-27 15:52:59,684 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/807e0d274/744131e19c064bc5a5ecc9f128e3446c [2024-01-27 15:52:59,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:52:59,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:52:59,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:52:59,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:52:59,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:52:59,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:52:59,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151f90d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59, skipping insertion in model container [2024-01-27 15:52:59,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:52:59,721 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:52:59,856 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/popl20-send-receive-alt.wvr.c[2676,2689] [2024-01-27 15:52:59,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:52:59,879 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:52:59,893 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/popl20-send-receive-alt.wvr.c[2676,2689] [2024-01-27 15:52:59,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:52:59,906 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:52:59,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59 WrapperNode [2024-01-27 15:52:59,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:52:59,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:52:59,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:52:59,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:52:59,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:52:59,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:52:59,959 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 149 [2024-01-27 15:52:59,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:52:59,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:52:59,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:52:59,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:52:59,970 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:52:59,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:52:59,984 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,003 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:53:00,004 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,014 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,016 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:53:00,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:53:00,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:53:00,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:53:00,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (1/1) ... [2024-01-27 15:53:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:53:00,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:00,069 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 15:53:00,115 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 15:53:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:53:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:53:00,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:53:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:53:00,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:53:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:53:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:53:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:53:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:53:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:53:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:53:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:53:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:53:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:53:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:53:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:53:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:53:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:53:00,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:53:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:53:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:53:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:53:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:53:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:53:00,127 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 15:53:00,237 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:53:00,238 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:53:00,496 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:53:00,496 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:53:00,653 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:53:00,653 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:53:00,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:53:00 BoogieIcfgContainer [2024-01-27 15:53:00,653 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:53:00,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:53:00,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:53:00,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:53:00,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:52:59" (1/3) ... [2024-01-27 15:53:00,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5ec621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:53:00, skipping insertion in model container [2024-01-27 15:53:00,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:59" (2/3) ... [2024-01-27 15:53:00,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5ec621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:53:00, skipping insertion in model container [2024-01-27 15:53:00,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:53:00" (3/3) ... [2024-01-27 15:53:00,659 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-01-27 15:53:00,666 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:53:00,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:53:00,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:53:00,673 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:53:00,713 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:53:00,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2024-01-27 15:53:00,774 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2024-01-27 15:53:00,774 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:53:00,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-01-27 15:53:00,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2024-01-27 15:53:00,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2024-01-27 15:53:00,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:53:00,799 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;@6886c4de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:53:00,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:53:00,807 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:53:00,808 INFO L124 PetriNetUnfolderBase]: 6/29 cut-off events. [2024-01-27 15:53:00,808 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:53:00,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:00,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:00,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:00,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:00,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1663499182, now seen corresponding path program 1 times [2024-01-27 15:53:00,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:00,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505111583] [2024-01-27 15:53:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:00,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:01,016 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 15:53:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:01,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505111583] [2024-01-27 15:53:01,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505111583] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:01,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:01,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423308835] [2024-01-27 15:53:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:53:01,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:01,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:53:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:53:01,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:01,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:01,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:01,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:01,143 INFO L124 PetriNetUnfolderBase]: 129/237 cut-off events. [2024-01-27 15:53:01,143 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-01-27 15:53:01,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 237 events. 129/237 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 975 event pairs, 86 based on Foata normal form. 38/217 useless extension candidates. Maximal degree in co-relation 397. Up to 212 conditions per place. [2024-01-27 15:53:01,150 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 21 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2024-01-27 15:53:01,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 110 flow [2024-01-27 15:53:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:53:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:53:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 41 transitions. [2024-01-27 15:53:01,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-01-27 15:53:01,162 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 2 states and 41 transitions. [2024-01-27 15:53:01,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 110 flow [2024-01-27 15:53:01,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:53:01,166 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 60 flow [2024-01-27 15:53:01,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-01-27 15:53:01,171 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-01-27 15:53:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 60 flow [2024-01-27 15:53:01,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:01,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:53:01,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:01,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -468229857, now seen corresponding path program 1 times [2024-01-27 15:53:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272898398] [2024-01-27 15:53:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:01,361 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 15:53:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:01,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272898398] [2024-01-27 15:53:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272898398] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:01,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:01,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:01,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892966774] [2024-01-27 15:53:01,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:53:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:53:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:53:01,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:01,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:01,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:01,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:01,479 INFO L124 PetriNetUnfolderBase]: 189/356 cut-off events. [2024-01-27 15:53:01,479 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:53:01,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 356 events. 189/356 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1645 event pairs, 69 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 692. Up to 177 conditions per place. [2024-01-27 15:53:01,481 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 31 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2024-01-27 15:53:01,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 169 flow [2024-01-27 15:53:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:53:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:53:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-01-27 15:53:01,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2024-01-27 15:53:01,483 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 60 flow. Second operand 3 states and 65 transitions. [2024-01-27 15:53:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 169 flow [2024-01-27 15:53:01,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 169 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:53:01,484 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 72 flow [2024-01-27 15:53:01,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-01-27 15:53:01,485 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-01-27 15:53:01,485 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 72 flow [2024-01-27 15:53:01,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:01,486 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] [2024-01-27 15:53:01,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:53:01,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:01,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash 688354536, now seen corresponding path program 1 times [2024-01-27 15:53:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889783390] [2024-01-27 15:53:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:01,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889783390] [2024-01-27 15:53:01,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889783390] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:01,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:01,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:01,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7692454] [2024-01-27 15:53:01,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:53:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:53:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:53:01,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:01,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:01,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:01,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:01,617 INFO L124 PetriNetUnfolderBase]: 210/412 cut-off events. [2024-01-27 15:53:01,617 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-27 15:53:01,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 412 events. 210/412 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1887 event pairs, 87 based on Foata normal form. 12/337 useless extension candidates. Maximal degree in co-relation 797. Up to 236 conditions per place. [2024-01-27 15:53:01,621 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 24 selfloop transitions, 3 changer transitions 7/41 dead transitions. [2024-01-27 15:53:01,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 166 flow [2024-01-27 15:53:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:53:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:53:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-01-27 15:53:01,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2024-01-27 15:53:01,625 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 72 flow. Second operand 3 states and 61 transitions. [2024-01-27 15:53:01,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 166 flow [2024-01-27 15:53:01,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:53:01,628 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2024-01-27 15:53:01,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-01-27 15:53:01,629 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2024-01-27 15:53:01,629 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2024-01-27 15:53:01,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:01,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:01,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:53:01,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:01,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2027600440, now seen corresponding path program 1 times [2024-01-27 15:53:01,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:01,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039135507] [2024-01-27 15:53:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:01,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:01,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:01,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039135507] [2024-01-27 15:53:01,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039135507] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:01,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:01,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:53:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101375001] [2024-01-27 15:53:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:53:01,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:53:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:53:01,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:01,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:01,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:01,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:01,898 INFO L124 PetriNetUnfolderBase]: 255/487 cut-off events. [2024-01-27 15:53:01,898 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-01-27 15:53:01,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 487 events. 255/487 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2412 event pairs, 196 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1054. Up to 355 conditions per place. [2024-01-27 15:53:01,900 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 23 selfloop transitions, 2 changer transitions 14/46 dead transitions. [2024-01-27 15:53:01,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 201 flow [2024-01-27 15:53:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-01-27 15:53:01,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-01-27 15:53:01,901 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 4 states and 73 transitions. [2024-01-27 15:53:01,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 201 flow [2024-01-27 15:53:01,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:53:01,903 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 100 flow [2024-01-27 15:53:01,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-27 15:53:01,904 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-01-27 15:53:01,904 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 100 flow [2024-01-27 15:53:01,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:01,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:01,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:01,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:53:01,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:01,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash 262947762, now seen corresponding path program 1 times [2024-01-27 15:53:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:01,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918461536] [2024-01-27 15:53:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:01,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918461536] [2024-01-27 15:53:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918461536] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529564433] [2024-01-27 15:53:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:02,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:02,551 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 15:53:02,581 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 15:53:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:02,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:53:02,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:02,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-27 15:53:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:02,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:03,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-01-27 15:53:03,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:03,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-01-27 15:53:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529564433] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:03,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:03,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-01-27 15:53:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921163746] [2024-01-27 15:53:03,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:53:03,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:53:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:53:03,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:03,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 100 flow. Second operand has 19 states, 19 states have (on average 11.842105263157896) internal successors, (225), 19 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:03,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:03,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:04,246 INFO L124 PetriNetUnfolderBase]: 1035/2153 cut-off events. [2024-01-27 15:53:04,247 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-01-27 15:53:04,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4515 conditions, 2153 events. 1035/2153 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14957 event pairs, 224 based on Foata normal form. 3/1876 useless extension candidates. Maximal degree in co-relation 4507. Up to 375 conditions per place. [2024-01-27 15:53:04,255 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 110 selfloop transitions, 35 changer transitions 77/229 dead transitions. [2024-01-27 15:53:04,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 229 transitions, 1090 flow [2024-01-27 15:53:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:53:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:53:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 411 transitions. [2024-01-27 15:53:04,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930735930735931 [2024-01-27 15:53:04,258 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 100 flow. Second operand 21 states and 411 transitions. [2024-01-27 15:53:04,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 229 transitions, 1090 flow [2024-01-27 15:53:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 229 transitions, 1060 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-01-27 15:53:04,262 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 377 flow [2024-01-27 15:53:04,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=377, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-01-27 15:53:04,263 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-01-27 15:53:04,263 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 377 flow [2024-01-27 15:53:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.842105263157896) internal successors, (225), 19 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:04,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:04,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:04,276 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 15:53:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:04,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:04,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1506991202, now seen corresponding path program 1 times [2024-01-27 15:53:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230955713] [2024-01-27 15:53:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:04,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230955713] [2024-01-27 15:53:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230955713] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:04,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:04,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:53:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768007593] [2024-01-27 15:53:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:53:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:53:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:53:04,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-01-27 15:53:04,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 377 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:04,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-01-27 15:53:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:04,744 INFO L124 PetriNetUnfolderBase]: 1213/2255 cut-off events. [2024-01-27 15:53:04,744 INFO L125 PetriNetUnfolderBase]: For 3290/3290 co-relation queries the response was YES. [2024-01-27 15:53:04,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6036 conditions, 2255 events. 1213/2255 cut-off events. For 3290/3290 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14412 event pairs, 644 based on Foata normal form. 40/2077 useless extension candidates. Maximal degree in co-relation 6019. Up to 1586 conditions per place. [2024-01-27 15:53:04,757 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 63 selfloop transitions, 2 changer transitions 3/73 dead transitions. [2024-01-27 15:53:04,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 523 flow [2024-01-27 15:53:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:53:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:53:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-01-27 15:53:04,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-01-27 15:53:04,758 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 377 flow. Second operand 3 states and 58 transitions. [2024-01-27 15:53:04,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 523 flow [2024-01-27 15:53:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 477 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-01-27 15:53:04,771 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 270 flow [2024-01-27 15:53:04,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-01-27 15:53:04,774 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-01-27 15:53:04,774 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 270 flow [2024-01-27 15:53:04,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:04,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:04,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:04,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:53:04,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:04,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1108695909, now seen corresponding path program 2 times [2024-01-27 15:53:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296439418] [2024-01-27 15:53:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:04,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296439418] [2024-01-27 15:53:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296439418] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358949926] [2024-01-27 15:53:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:04,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:04,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:04,938 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 15:53:04,963 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 15:53:05,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:05,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:05,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:53:05,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:05,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:05,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358949926] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:05,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:05,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-01-27 15:53:05,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793855241] [2024-01-27 15:53:05,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:53:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:53:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:53:05,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:05,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 270 flow. Second operand has 18 states, 18 states have (on average 12.0) internal successors, (216), 18 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:05,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:05,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:05,598 INFO L124 PetriNetUnfolderBase]: 829/1735 cut-off events. [2024-01-27 15:53:05,599 INFO L125 PetriNetUnfolderBase]: For 2233/2233 co-relation queries the response was YES. [2024-01-27 15:53:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 1735 events. 829/1735 cut-off events. For 2233/2233 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11761 event pairs, 296 based on Foata normal form. 22/1601 useless extension candidates. Maximal degree in co-relation 4501. Up to 516 conditions per place. [2024-01-27 15:53:05,605 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 32 selfloop transitions, 6 changer transitions 64/110 dead transitions. [2024-01-27 15:53:05,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 626 flow [2024-01-27 15:53:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:53:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:53:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-01-27 15:53:05,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424242424242425 [2024-01-27 15:53:05,607 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 270 flow. Second operand 10 states and 179 transitions. [2024-01-27 15:53:05,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 626 flow [2024-01-27 15:53:05,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 611 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:53:05,611 INFO L231 Difference]: Finished difference. Result has 70 places, 43 transitions, 206 flow [2024-01-27 15:53:05,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=206, PETRI_PLACES=70, PETRI_TRANSITIONS=43} [2024-01-27 15:53:05,612 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-01-27 15:53:05,612 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 43 transitions, 206 flow [2024-01-27 15:53:05,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.0) internal successors, (216), 18 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:05,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:05,613 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:05,624 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 15:53:05,824 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,SelfDestructingSolverStorable6 [2024-01-27 15:53:05,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:05,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2046120380, now seen corresponding path program 3 times [2024-01-27 15:53:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:05,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836387122] [2024-01-27 15:53:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:07,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836387122] [2024-01-27 15:53:07,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836387122] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:07,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021426058] [2024-01-27 15:53:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:53:07,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:07,022 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 15:53:07,046 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 15:53:07,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:53:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:07,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:53:07,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:07,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:07,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:07,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-01-27 15:53:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:53:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021426058] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:07,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:07,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 17 [2024-01-27 15:53:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495102593] [2024-01-27 15:53:07,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:07,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:53:07,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:53:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:53:07,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:07,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 43 transitions, 206 flow. Second operand has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 18 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:07,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:07,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:07,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:07,989 INFO L124 PetriNetUnfolderBase]: 639/1284 cut-off events. [2024-01-27 15:53:07,989 INFO L125 PetriNetUnfolderBase]: For 2739/2743 co-relation queries the response was YES. [2024-01-27 15:53:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3661 conditions, 1284 events. 639/1284 cut-off events. For 2739/2743 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8069 event pairs, 228 based on Foata normal form. 1/1145 useless extension candidates. Maximal degree in co-relation 3642. Up to 353 conditions per place. [2024-01-27 15:53:07,995 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 51 selfloop transitions, 17 changer transitions 19/95 dead transitions. [2024-01-27 15:53:07,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 586 flow [2024-01-27 15:53:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:53:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:53:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-01-27 15:53:07,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986225895316804 [2024-01-27 15:53:07,997 INFO L175 Difference]: Start difference. First operand has 70 places, 43 transitions, 206 flow. Second operand 11 states and 181 transitions. [2024-01-27 15:53:07,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 586 flow [2024-01-27 15:53:08,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 496 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-01-27 15:53:08,004 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 239 flow [2024-01-27 15:53:08,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=239, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-01-27 15:53:08,006 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-01-27 15:53:08,006 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 239 flow [2024-01-27 15:53:08,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 18 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:08,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:08,007 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:08,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:08,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:08,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:08,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1679045457, now seen corresponding path program 4 times [2024-01-27 15:53:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:08,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917231331] [2024-01-27 15:53:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:08,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:08,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:08,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917231331] [2024-01-27 15:53:08,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917231331] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:08,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498632175] [2024-01-27 15:53:08,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:53:08,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:08,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:08,294 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 15:53:08,320 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 15:53:08,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:53:08,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:08,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:53:08,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:53:08,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:08,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498632175] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:08,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:08,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-01-27 15:53:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35135644] [2024-01-27 15:53:08,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:53:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:08,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:53:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:53:08,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:08,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:08,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:08,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:08,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:08,640 INFO L124 PetriNetUnfolderBase]: 1103/2270 cut-off events. [2024-01-27 15:53:08,640 INFO L125 PetriNetUnfolderBase]: For 1897/1897 co-relation queries the response was YES. [2024-01-27 15:53:08,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5478 conditions, 2270 events. 1103/2270 cut-off events. For 1897/1897 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14871 event pairs, 438 based on Foata normal form. 24/2073 useless extension candidates. Maximal degree in co-relation 5465. Up to 753 conditions per place. [2024-01-27 15:53:08,648 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 56 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-01-27 15:53:08,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 514 flow [2024-01-27 15:53:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-01-27 15:53:08,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2024-01-27 15:53:08,649 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 239 flow. Second operand 4 states and 85 transitions. [2024-01-27 15:53:08,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 514 flow [2024-01-27 15:53:08,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 474 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-01-27 15:53:08,653 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 339 flow [2024-01-27 15:53:08,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-01-27 15:53:08,654 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-01-27 15:53:08,655 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 339 flow [2024-01-27 15:53:08,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:08,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:08,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:08,666 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 15:53:08,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:08,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:08,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2075333885, now seen corresponding path program 5 times [2024-01-27 15:53:08,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:08,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891039587] [2024-01-27 15:53:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:08,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:08,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:08,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891039587] [2024-01-27 15:53:08,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891039587] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:08,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:08,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:53:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217971455] [2024-01-27 15:53:08,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:53:08,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:53:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:53:08,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-01-27 15:53:08,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:08,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:08,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-01-27 15:53:08,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:09,258 INFO L124 PetriNetUnfolderBase]: 1949/3719 cut-off events. [2024-01-27 15:53:09,258 INFO L125 PetriNetUnfolderBase]: For 4052/4052 co-relation queries the response was YES. [2024-01-27 15:53:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9752 conditions, 3719 events. 1949/3719 cut-off events. For 4052/4052 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 23934 event pairs, 334 based on Foata normal form. 200/3614 useless extension candidates. Maximal degree in co-relation 9737. Up to 1804 conditions per place. [2024-01-27 15:53:09,273 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 72 selfloop transitions, 4 changer transitions 4/84 dead transitions. [2024-01-27 15:53:09,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 672 flow [2024-01-27 15:53:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-01-27 15:53:09,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-01-27 15:53:09,275 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 339 flow. Second operand 4 states and 69 transitions. [2024-01-27 15:53:09,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 672 flow [2024-01-27 15:53:09,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 660 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-27 15:53:09,280 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 354 flow [2024-01-27 15:53:09,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-01-27 15:53:09,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-01-27 15:53:09,281 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 354 flow [2024-01-27 15:53:09,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:09,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:09,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 15:53:09,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:09,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1325344437, now seen corresponding path program 1 times [2024-01-27 15:53:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810355216] [2024-01-27 15:53:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:09,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:09,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810355216] [2024-01-27 15:53:09,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810355216] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:09,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412450820] [2024-01-27 15:53:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:09,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:09,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:09,910 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 15:53:09,936 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 15:53:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:09,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:53:09,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:10,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:10,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:10,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-27 15:53:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:10,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412450820] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:10,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:53:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581446334] [2024-01-27 15:53:10,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:53:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:53:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:53:10,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:10,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 354 flow. Second operand has 31 states, 31 states have (on average 11.161290322580646) internal successors, (346), 31 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:10,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:10,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:12,414 INFO L124 PetriNetUnfolderBase]: 3217/6978 cut-off events. [2024-01-27 15:53:12,415 INFO L125 PetriNetUnfolderBase]: For 9572/9576 co-relation queries the response was YES. [2024-01-27 15:53:12,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18839 conditions, 6978 events. 3217/6978 cut-off events. For 9572/9576 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 57117 event pairs, 452 based on Foata normal form. 42/6500 useless extension candidates. Maximal degree in co-relation 18821. Up to 1271 conditions per place. [2024-01-27 15:53:12,445 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 170 selfloop transitions, 67 changer transitions 107/353 dead transitions. [2024-01-27 15:53:12,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 353 transitions, 2178 flow [2024-01-27 15:53:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:53:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:53:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 604 transitions. [2024-01-27 15:53:12,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2024-01-27 15:53:12,448 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 354 flow. Second operand 32 states and 604 transitions. [2024-01-27 15:53:12,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 353 transitions, 2178 flow [2024-01-27 15:53:12,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 353 transitions, 2172 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:53:12,462 INFO L231 Difference]: Finished difference. Result has 116 places, 111 transitions, 1162 flow [2024-01-27 15:53:12,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1162, PETRI_PLACES=116, PETRI_TRANSITIONS=111} [2024-01-27 15:53:12,463 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-01-27 15:53:12,463 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 111 transitions, 1162 flow [2024-01-27 15:53:12,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.161290322580646) internal successors, (346), 31 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:12,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:12,464 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:12,478 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 15:53:12,675 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,SelfDestructingSolverStorable10 [2024-01-27 15:53:12,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:12,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash -79138231, now seen corresponding path program 2 times [2024-01-27 15:53:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:12,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042641046] [2024-01-27 15:53:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:13,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:13,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042641046] [2024-01-27 15:53:13,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042641046] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:13,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948317784] [2024-01-27 15:53:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:13,545 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 15:53:13,546 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 15:53:13,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:13,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:13,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:53:13,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:14,095 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-01-27 15:53:14,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-01-27 15:53:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:14,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:14,369 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-27 15:53:14,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-01-27 15:53:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:14,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948317784] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:14,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:14,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:53:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103555558] [2024-01-27 15:53:14,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:53:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:53:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:53:14,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:14,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 111 transitions, 1162 flow. Second operand has 31 states, 31 states have (on average 11.225806451612904) internal successors, (348), 31 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:14,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:14,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:14,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:20,910 INFO L124 PetriNetUnfolderBase]: 8979/19191 cut-off events. [2024-01-27 15:53:20,910 INFO L125 PetriNetUnfolderBase]: For 152108/152162 co-relation queries the response was YES. [2024-01-27 15:53:20,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71805 conditions, 19191 events. 8979/19191 cut-off events. For 152108/152162 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 173194 event pairs, 1820 based on Foata normal form. 108/17819 useless extension candidates. Maximal degree in co-relation 71764. Up to 2775 conditions per place. [2024-01-27 15:53:21,019 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 422 selfloop transitions, 182 changer transitions 207/820 dead transitions. [2024-01-27 15:53:21,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 820 transitions, 7365 flow [2024-01-27 15:53:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-01-27 15:53:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-01-27 15:53:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1311 transitions. [2024-01-27 15:53:21,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6019283746556474 [2024-01-27 15:53:21,023 INFO L175 Difference]: Start difference. First operand has 116 places, 111 transitions, 1162 flow. Second operand 66 states and 1311 transitions. [2024-01-27 15:53:21,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 820 transitions, 7365 flow [2024-01-27 15:53:21,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 820 transitions, 6913 flow, removed 218 selfloop flow, removed 6 redundant places. [2024-01-27 15:53:21,238 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 3795 flow [2024-01-27 15:53:21,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=3795, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-01-27 15:53:21,239 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 190 predicate places. [2024-01-27 15:53:21,239 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 3795 flow [2024-01-27 15:53:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.225806451612904) internal successors, (348), 31 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:21,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:21,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:21,260 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 15:53:21,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:21,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:21,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1924068513, now seen corresponding path program 3 times [2024-01-27 15:53:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:21,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907180140] [2024-01-27 15:53:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:22,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:22,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907180140] [2024-01-27 15:53:22,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907180140] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:22,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269144488] [2024-01-27 15:53:22,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:53:22,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:22,312 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 15:53:22,332 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 15:53:22,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-27 15:53:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:22,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:53:22,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:22,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:22,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:22,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-27 15:53:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:53:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269144488] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:22,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:22,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2024-01-27 15:53:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050559420] [2024-01-27 15:53:22,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:53:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:53:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:53:22,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:22,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 3795 flow. Second operand has 24 states, 24 states have (on average 11.916666666666666) internal successors, (286), 24 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:22,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:22,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:22,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:26,959 INFO L124 PetriNetUnfolderBase]: 9091/19626 cut-off events. [2024-01-27 15:53:26,959 INFO L125 PetriNetUnfolderBase]: For 621078/621194 co-relation queries the response was YES. [2024-01-27 15:53:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101651 conditions, 19626 events. 9091/19626 cut-off events. For 621078/621194 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 179547 event pairs, 3536 based on Foata normal form. 72/18239 useless extension candidates. Maximal degree in co-relation 101564. Up to 11573 conditions per place. [2024-01-27 15:53:27,195 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 256 selfloop transitions, 59 changer transitions 73/397 dead transitions. [2024-01-27 15:53:27,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 397 transitions, 5690 flow [2024-01-27 15:53:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:53:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:53:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 351 transitions. [2024-01-27 15:53:27,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598086124401914 [2024-01-27 15:53:27,196 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 3795 flow. Second operand 19 states and 351 transitions. [2024-01-27 15:53:27,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 397 transitions, 5690 flow [2024-01-27 15:53:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 397 transitions, 4504 flow, removed 571 selfloop flow, removed 10 redundant places. [2024-01-27 15:53:28,893 INFO L231 Difference]: Finished difference. Result has 232 places, 261 transitions, 2823 flow [2024-01-27 15:53:28,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2823, PETRI_PLACES=232, PETRI_TRANSITIONS=261} [2024-01-27 15:53:28,894 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2024-01-27 15:53:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 261 transitions, 2823 flow [2024-01-27 15:53:28,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.916666666666666) internal successors, (286), 24 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:28,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:28,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:28,906 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 15:53:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:29,106 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:29,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -44319139, now seen corresponding path program 4 times [2024-01-27 15:53:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500800389] [2024-01-27 15:53:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:30,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:30,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500800389] [2024-01-27 15:53:30,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500800389] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:30,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594824336] [2024-01-27 15:53:30,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:53:30,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:30,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:30,052 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 15:53:30,079 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 15:53:30,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:53:30,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:30,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:53:30,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:30,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:30,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:30,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-27 15:53:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:53:30,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594824336] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:30,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:30,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 21 [2024-01-27 15:53:30,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806041623] [2024-01-27 15:53:30,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:30,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:53:30,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:53:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:53:30,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:30,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 261 transitions, 2823 flow. Second operand has 22 states, 22 states have (on average 12.136363636363637) internal successors, (267), 22 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:30,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:30,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:30,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:34,256 INFO L124 PetriNetUnfolderBase]: 9531/20421 cut-off events. [2024-01-27 15:53:34,256 INFO L125 PetriNetUnfolderBase]: For 617708/617824 co-relation queries the response was YES. [2024-01-27 15:53:34,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100364 conditions, 20421 events. 9531/20421 cut-off events. For 617708/617824 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 187465 event pairs, 3974 based on Foata normal form. 78/18912 useless extension candidates. Maximal degree in co-relation 100273. Up to 11814 conditions per place. [2024-01-27 15:53:34,480 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 259 selfloop transitions, 60 changer transitions 69/397 dead transitions. [2024-01-27 15:53:34,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 397 transitions, 4705 flow [2024-01-27 15:53:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:53:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:53:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 334 transitions. [2024-01-27 15:53:34,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622895622895623 [2024-01-27 15:53:34,482 INFO L175 Difference]: Start difference. First operand has 232 places, 261 transitions, 2823 flow. Second operand 18 states and 334 transitions. [2024-01-27 15:53:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 397 transitions, 4705 flow [2024-01-27 15:53:35,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 397 transitions, 4559 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-01-27 15:53:35,593 INFO L231 Difference]: Finished difference. Result has 240 places, 269 transitions, 3009 flow [2024-01-27 15:53:35,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3009, PETRI_PLACES=240, PETRI_TRANSITIONS=269} [2024-01-27 15:53:35,593 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 209 predicate places. [2024-01-27 15:53:35,593 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 269 transitions, 3009 flow [2024-01-27 15:53:35,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.136363636363637) internal successors, (267), 22 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:35,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:35,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:35,605 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 15:53:35,794 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,SelfDestructingSolverStorable13 [2024-01-27 15:53:35,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:35,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1113931952, now seen corresponding path program 5 times [2024-01-27 15:53:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069560112] [2024-01-27 15:53:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069560112] [2024-01-27 15:53:35,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069560112] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762297336] [2024-01-27 15:53:35,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:53:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:35,866 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 15:53:35,884 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 15:53:35,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-27 15:53:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:35,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:53:35,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:53:35,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:36,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762297336] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:36,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:36,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-01-27 15:53:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778128545] [2024-01-27 15:53:36,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:36,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:53:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:53:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:53:36,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 269 transitions, 3009 flow. Second operand has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:36,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:40,015 INFO L124 PetriNetUnfolderBase]: 11033/23934 cut-off events. [2024-01-27 15:53:40,015 INFO L125 PetriNetUnfolderBase]: For 762350/762463 co-relation queries the response was YES. [2024-01-27 15:53:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120203 conditions, 23934 events. 11033/23934 cut-off events. For 762350/762463 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 225591 event pairs, 2744 based on Foata normal form. 188/22363 useless extension candidates. Maximal degree in co-relation 120110. Up to 9281 conditions per place. [2024-01-27 15:53:40,314 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 171 selfloop transitions, 157 changer transitions 0/337 dead transitions. [2024-01-27 15:53:40,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 337 transitions, 4681 flow [2024-01-27 15:53:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:53:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:53:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-01-27 15:53:40,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-01-27 15:53:40,315 INFO L175 Difference]: Start difference. First operand has 240 places, 269 transitions, 3009 flow. Second operand 5 states and 108 transitions. [2024-01-27 15:53:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 337 transitions, 4681 flow [2024-01-27 15:53:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 337 transitions, 4389 flow, removed 101 selfloop flow, removed 23 redundant places. [2024-01-27 15:53:41,345 INFO L231 Difference]: Finished difference. Result has 207 places, 297 transitions, 3952 flow [2024-01-27 15:53:41,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3952, PETRI_PLACES=207, PETRI_TRANSITIONS=297} [2024-01-27 15:53:41,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2024-01-27 15:53:41,346 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 297 transitions, 3952 flow [2024-01-27 15:53:41,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:41,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:41,346 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:41,360 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 15:53:41,547 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,SelfDestructingSolverStorable14 [2024-01-27 15:53:41,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:41,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash -361151956, now seen corresponding path program 6 times [2024-01-27 15:53:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:41,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235207744] [2024-01-27 15:53:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:41,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235207744] [2024-01-27 15:53:41,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235207744] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:41,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166478339] [2024-01-27 15:53:41,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:53:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:41,673 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 15:53:41,678 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 15:53:41,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:53:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:41,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:53:41,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:41,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166478339] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:42,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:53:42,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533678389] [2024-01-27 15:53:42,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:53:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:53:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:53:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:42,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 297 transitions, 3952 flow. Second operand has 21 states, 21 states have (on average 11.714285714285714) internal successors, (246), 21 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:42,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:42,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:42,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:43,505 INFO L124 PetriNetUnfolderBase]: 4045/8615 cut-off events. [2024-01-27 15:53:43,506 INFO L125 PetriNetUnfolderBase]: For 250010/250055 co-relation queries the response was YES. [2024-01-27 15:53:43,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44670 conditions, 8615 events. 4045/8615 cut-off events. For 250010/250055 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 72030 event pairs, 3290 based on Foata normal form. 59/7882 useless extension candidates. Maximal degree in co-relation 44585. Up to 6481 conditions per place. [2024-01-27 15:53:43,555 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 87 selfloop transitions, 4 changer transitions 57/157 dead transitions. [2024-01-27 15:53:43,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 157 transitions, 2094 flow [2024-01-27 15:53:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:53:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:53:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-01-27 15:53:43,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-01-27 15:53:43,556 INFO L175 Difference]: Start difference. First operand has 207 places, 297 transitions, 3952 flow. Second operand 10 states and 166 transitions. [2024-01-27 15:53:43,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 157 transitions, 2094 flow [2024-01-27 15:53:43,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 157 transitions, 1603 flow, removed 179 selfloop flow, removed 44 redundant places. [2024-01-27 15:53:43,846 INFO L231 Difference]: Finished difference. Result has 132 places, 100 transitions, 1019 flow [2024-01-27 15:53:43,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1019, PETRI_PLACES=132, PETRI_TRANSITIONS=100} [2024-01-27 15:53:43,847 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-01-27 15:53:43,847 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 100 transitions, 1019 flow [2024-01-27 15:53:43,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.714285714285714) internal successors, (246), 21 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:43,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:43,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:43,858 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 15:53:44,052 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,SelfDestructingSolverStorable15 [2024-01-27 15:53:44,052 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:44,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 72999204, now seen corresponding path program 7 times [2024-01-27 15:53:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:44,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033546232] [2024-01-27 15:53:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:44,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:45,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:45,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033546232] [2024-01-27 15:53:45,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033546232] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:45,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261986245] [2024-01-27 15:53:45,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:53:45,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:45,003 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 15:53:45,005 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 15:53:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:45,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:53:45,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:45,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:46,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:46,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-01-27 15:53:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:46,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261986245] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:46,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:46,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2024-01-27 15:53:46,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843256253] [2024-01-27 15:53:46,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:46,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-01-27 15:53:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-01-27 15:53:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2024-01-27 15:53:46,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:46,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 100 transitions, 1019 flow. Second operand has 40 states, 40 states have (on average 11.1) internal successors, (444), 40 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:46,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:46,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:46,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:52,596 INFO L124 PetriNetUnfolderBase]: 9858/20856 cut-off events. [2024-01-27 15:53:52,597 INFO L125 PetriNetUnfolderBase]: For 194721/194749 co-relation queries the response was YES. [2024-01-27 15:53:52,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78343 conditions, 20856 events. 9858/20856 cut-off events. For 194721/194749 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 197335 event pairs, 1993 based on Foata normal form. 37/19280 useless extension candidates. Maximal degree in co-relation 78298. Up to 4477 conditions per place. [2024-01-27 15:53:52,702 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 416 selfloop transitions, 243 changer transitions 238/906 dead transitions. [2024-01-27 15:53:52,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 906 transitions, 8090 flow [2024-01-27 15:53:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-01-27 15:53:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-01-27 15:53:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1355 transitions. [2024-01-27 15:53:52,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038324420677362 [2024-01-27 15:53:52,705 INFO L175 Difference]: Start difference. First operand has 132 places, 100 transitions, 1019 flow. Second operand 68 states and 1355 transitions. [2024-01-27 15:53:52,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 906 transitions, 8090 flow [2024-01-27 15:53:52,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 906 transitions, 6918 flow, removed 575 selfloop flow, removed 18 redundant places. [2024-01-27 15:53:52,826 INFO L231 Difference]: Finished difference. Result has 191 places, 327 transitions, 4208 flow [2024-01-27 15:53:52,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4208, PETRI_PLACES=191, PETRI_TRANSITIONS=327} [2024-01-27 15:53:52,827 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2024-01-27 15:53:52,827 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 327 transitions, 4208 flow [2024-01-27 15:53:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 11.1) internal successors, (444), 40 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:52,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:52,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:52,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-27 15:53:53,033 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,SelfDestructingSolverStorable16 [2024-01-27 15:53:53,034 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:53,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2123377474, now seen corresponding path program 8 times [2024-01-27 15:53:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852529602] [2024-01-27 15:53:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852529602] [2024-01-27 15:53:53,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852529602] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483943356] [2024-01-27 15:53:53,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:53,741 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 15:53:53,742 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 15:53:53,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:53,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:53,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:53:53,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:54,688 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-01-27 15:53:54,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-01-27 15:53:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:54,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:55,110 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-01-27 15:53:55,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 114 [2024-01-27 15:53:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:56,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483943356] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:56,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:56,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-01-27 15:53:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277565106] [2024-01-27 15:53:56,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:56,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:53:56,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:53:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2024-01-27 15:53:56,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:53:56,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 327 transitions, 4208 flow. Second operand has 39 states, 39 states have (on average 11.153846153846153) internal successors, (435), 39 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:56,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:53:56,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:15,041 INFO L124 PetriNetUnfolderBase]: 23826/51005 cut-off events. [2024-01-27 15:54:15,041 INFO L125 PetriNetUnfolderBase]: For 868509/868639 co-relation queries the response was YES. [2024-01-27 15:54:15,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219102 conditions, 51005 events. 23826/51005 cut-off events. For 868509/868639 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 504729 event pairs, 3793 based on Foata normal form. 313/47395 useless extension candidates. Maximal degree in co-relation 219041. Up to 6888 conditions per place. [2024-01-27 15:54:15,512 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 759 selfloop transitions, 577 changer transitions 465/1810 dead transitions. [2024-01-27 15:54:15,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1810 transitions, 20220 flow [2024-01-27 15:54:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-01-27 15:54:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2024-01-27 15:54:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 2324 transitions. [2024-01-27 15:54:15,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177565124933546 [2024-01-27 15:54:15,517 INFO L175 Difference]: Start difference. First operand has 191 places, 327 transitions, 4208 flow. Second operand 114 states and 2324 transitions. [2024-01-27 15:54:15,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1810 transitions, 20220 flow [2024-01-27 15:54:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1810 transitions, 17842 flow, removed 1171 selfloop flow, removed 13 redundant places. [2024-01-27 15:54:16,452 INFO L231 Difference]: Finished difference. Result has 355 places, 769 transitions, 11832 flow [2024-01-27 15:54:16,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=11832, PETRI_PLACES=355, PETRI_TRANSITIONS=769} [2024-01-27 15:54:16,452 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 324 predicate places. [2024-01-27 15:54:16,453 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 769 transitions, 11832 flow [2024-01-27 15:54:16,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.153846153846153) internal successors, (435), 39 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:16,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:16,453 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:16,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:54:16,654 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:16,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1626075098, now seen corresponding path program 9 times [2024-01-27 15:54:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757221570] [2024-01-27 15:54:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:17,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757221570] [2024-01-27 15:54:17,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757221570] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125329249] [2024-01-27 15:54:17,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:17,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:17,411 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 15:54:17,413 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 15:54:17,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-27 15:54:17,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:17,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:54:17,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:17,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:54:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:18,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:19,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 152 [2024-01-27 15:54:19,117 INFO L349 Elim1Store]: treesize reduction 31, result has 69.9 percent of original size [2024-01-27 15:54:19,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 525 treesize of output 417 [2024-01-27 15:54:19,427 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:54:19,601 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:54:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125329249] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:22,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:22,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-01-27 15:54:22,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872515807] [2024-01-27 15:54:22,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:54:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:54:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:54:22,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-01-27 15:54:22,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 769 transitions, 11832 flow. Second operand has 38 states, 38 states have (on average 11.157894736842104) internal successors, (424), 38 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:22,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:22,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-01-27 15:54:22,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand