./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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-simple-queue.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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:53:52,880 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:53:52,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:53:52,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:53:52,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:53:52,997 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:53:52,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:53:52,998 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:53:52,998 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:53:53,002 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:53:53,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:53:53,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:53:53,003 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:53:53,004 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:53:53,005 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:53:53,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:53:53,005 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:53:53,005 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:53:53,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:53:53,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:53:53,006 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:53:53,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:53:53,007 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:53:53,007 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:53:53,007 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:53:53,008 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:53:53,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:53:53,009 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:53:53,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:53:53,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:53:53,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:53:53,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:53:53,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:53:53,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:53:53,011 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:53:53,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:53:53,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:53:53,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:53:53,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:53:53,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:53:53,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:53:53,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:53:53,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:53:53,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-01-27 15:53:53,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:53:53,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:53:53,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:53:53,267 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:53:53,267 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:53:53,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2024-01-27 15:53:54,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:53:54,582 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:53:54,583 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2024-01-27 15:53:54,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bdb29c4e/ff3fea6ca07e4240b1c9823d1e8388eb/FLAG1a11dbb85 [2024-01-27 15:53:54,600 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bdb29c4e/ff3fea6ca07e4240b1c9823d1e8388eb [2024-01-27 15:53:54,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:53:54,603 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:53:54,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:53:54,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:53:54,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:53:54,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cc08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54, skipping insertion in model container [2024-01-27 15:53:54,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,635 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:53:54,771 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-simple-queue.wvr.c[2464,2477] [2024-01-27 15:53:54,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:53:54,790 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:53:54,808 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-simple-queue.wvr.c[2464,2477] [2024-01-27 15:53:54,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:53:54,826 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:53:54,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54 WrapperNode [2024-01-27 15:53:54,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:53:54,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:53:54,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:53:54,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:53:54,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,862 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 135 [2024-01-27 15:53:54,862 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:53:54,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:53:54,863 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:53:54,863 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:53:54,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,894 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 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 15:53:54,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:53:54,915 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:53:54,915 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:53:54,915 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:53:54,916 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (1/1) ... [2024-01-27 15:53:54,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:53:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:54,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:53:54,975 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 15:53:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:53:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:53:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:53:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:53:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:53:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:53:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:53:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:53:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:53:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:53:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:53:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:53:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:53:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:53:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:53:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:53:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:53:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:53:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:53:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:53:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:53:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:53:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:53:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:53:55,024 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 15:53:55,151 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:53:55,153 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:53:55,428 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:53:55,429 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:53:55,607 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:53:55,611 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:53:55,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:53:55 BoogieIcfgContainer [2024-01-27 15:53:55,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:53:55,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:53:55,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:53:55,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:53:55,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:53:54" (1/3) ... [2024-01-27 15:53:55,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d90ed22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:53:55, skipping insertion in model container [2024-01-27 15:53:55,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:54" (2/3) ... [2024-01-27 15:53:55,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d90ed22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:53:55, skipping insertion in model container [2024-01-27 15:53:55,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:53:55" (3/3) ... [2024-01-27 15:53:55,619 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-01-27 15:53:55,626 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:53:55,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:53:55,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:53:55,633 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:53:55,682 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:53:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2024-01-27 15:53:55,757 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-01-27 15:53:55,758 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:53:55,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-01-27 15:53:55,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2024-01-27 15:53:55,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2024-01-27 15:53:55,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:53:55,785 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;@35e14adc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:53:55,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:53:55,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:53:55,793 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2024-01-27 15:53:55,794 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:53:55,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:55,794 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 15:53:55,795 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 15:53:55,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1575601250, now seen corresponding path program 1 times [2024-01-27 15:53:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944596462] [2024-01-27 15:53:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:55,954 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 15:53:55,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:55,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944596462] [2024-01-27 15:53:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944596462] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:55,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:55,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:55,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231127173] [2024-01-27 15:53:55,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:53:55,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:53:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:53:55,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:53:56,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:56,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:53:56,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:56,131 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2024-01-27 15:53:56,131 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-27 15:53:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 770 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2024-01-27 15:53:56,135 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-01-27 15:53:56,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2024-01-27 15:53:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:53:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:53:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-01-27 15:53:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-01-27 15:53:56,149 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2024-01-27 15:53:56,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2024-01-27 15:53:56,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:53:56,154 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2024-01-27 15:53:56,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-01-27 15:53:56,160 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-01-27 15:53:56,160 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2024-01-27 15:53:56,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:56,161 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 15:53:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:53:56,161 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 15:53:56,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1742595539, now seen corresponding path program 1 times [2024-01-27 15:53:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:56,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333060370] [2024-01-27 15:53:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:56,342 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 15:53:56,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333060370] [2024-01-27 15:53:56,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333060370] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:56,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:56,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:56,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85410244] [2024-01-27 15:53:56,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:53:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:53:56,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:53:56,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:53:56,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:56,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:53:56,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:56,447 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2024-01-27 15:53:56,447 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-27 15:53:56,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1224 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2024-01-27 15:53:56,450 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-01-27 15:53:56,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2024-01-27 15:53:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:53:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:53:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-01-27 15:53:56,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-01-27 15:53:56,453 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-01-27 15:53:56,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2024-01-27 15:53:56,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:53:56,455 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2024-01-27 15:53:56,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2024-01-27 15:53:56,457 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-01-27 15:53:56,458 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2024-01-27 15:53:56,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:56,460 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 15:53:56,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:53:56,461 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 15:53:56,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -358079149, now seen corresponding path program 1 times [2024-01-27 15:53:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17615710] [2024-01-27 15:53:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:56,595 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 15:53:56,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:56,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17615710] [2024-01-27 15:53:56,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17615710] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:56,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:56,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:56,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523719806] [2024-01-27 15:53:56,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:56,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:53:56,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:53:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:53:56,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:53:56,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:56,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:53:56,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:56,696 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2024-01-27 15:53:56,696 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-27 15:53:56,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1570 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2024-01-27 15:53:56,701 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2024-01-27 15:53:56,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2024-01-27 15:53:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:53:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:53:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-27 15:53:56,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-01-27 15:53:56,704 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-27 15:53:56,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2024-01-27 15:53:56,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:53:56,707 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2024-01-27 15:53:56,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-01-27 15:53:56,708 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2024-01-27 15:53:56,709 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2024-01-27 15:53:56,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:56,709 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] [2024-01-27 15:53:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:53:56,710 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 15:53:56,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1064370560, now seen corresponding path program 1 times [2024-01-27 15:53:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623399503] [2024-01-27 15:53:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:56,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:56,886 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 15:53:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623399503] [2024-01-27 15:53:56,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623399503] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:56,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:56,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:53:56,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798196353] [2024-01-27 15:53:56,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:56,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:53:56,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:53:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:53:56,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:53:56,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:56,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:53:56,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:56,988 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2024-01-27 15:53:56,988 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-27 15:53:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2275 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2024-01-27 15:53:56,990 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2024-01-27 15:53:56,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2024-01-27 15:53:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-01-27 15:53:56,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-01-27 15:53:56,993 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2024-01-27 15:53:56,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2024-01-27 15:53:56,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:53:56,995 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2024-01-27 15:53:56,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-01-27 15:53:56,997 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-01-27 15:53:56,997 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2024-01-27 15:53:56,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:56,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:56,997 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] [2024-01-27 15:53:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:53:56,998 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 15:53:56,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash -185195771, now seen corresponding path program 1 times [2024-01-27 15:53:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052396036] [2024-01-27 15:53:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:56,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:57,449 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 15:53:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052396036] [2024-01-27 15:53:57,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052396036] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:57,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106592934] [2024-01-27 15:53:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:57,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:57,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:57,456 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 15:53:57,476 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 15:53:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:57,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:53:57,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:57,662 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 15:53:57,887 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 15:53:57,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:58,250 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 38 treesize of output 34 [2024-01-27 15:53:58,265 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:53:58,265 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 46 treesize of output 37 [2024-01-27 15:53:58,333 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 15:53:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106592934] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:58,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-01-27 15:53:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077142261] [2024-01-27 15:53:58,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:53:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:53:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:53:58,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:53:58,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:58,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:58,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:53:58,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:58,716 INFO L124 PetriNetUnfolderBase]: 407/789 cut-off events. [2024-01-27 15:53:58,716 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-01-27 15:53:58,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1711 conditions, 789 events. 407/789 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4274 event pairs, 168 based on Foata normal form. 2/642 useless extension candidates. Maximal degree in co-relation 1703. Up to 210 conditions per place. [2024-01-27 15:53:58,720 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 27 selfloop transitions, 4 changer transitions 45/81 dead transitions. [2024-01-27 15:53:58,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 81 transitions, 379 flow [2024-01-27 15:53:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:53:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:53:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-01-27 15:53:58,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-01-27 15:53:58,722 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 8 states and 132 transitions. [2024-01-27 15:53:58,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 81 transitions, 379 flow [2024-01-27 15:53:58,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 81 transitions, 371 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:53:58,724 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 108 flow [2024-01-27 15:53:58,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-01-27 15:53:58,725 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2024-01-27 15:53:58,725 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 108 flow [2024-01-27 15:53:58,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:58,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:58,726 INFO L208 CegarLoopForPetriNet]: trace histogram [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 15:53:58,747 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 15:53:58,940 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 15:53:58,941 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 15:53:58,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1523333984, now seen corresponding path program 2 times [2024-01-27 15:53:58,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991829950] [2024-01-27 15:53:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991829950] [2024-01-27 15:53:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991829950] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876835280] [2024-01-27 15:53:59,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:59,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:59,604 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 15:53:59,622 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 15:53:59,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:59,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:59,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:53:59,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:59,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:59,811 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:53:59,811 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 24 treesize of output 11 [2024-01-27 15:53:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876835280] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:59,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 10 [2024-01-27 15:53:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464579951] [2024-01-27 15:53:59,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:59,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:53:59,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:53:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:53:59,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:53:59,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 108 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:59,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:59,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:53:59,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:00,171 INFO L124 PetriNetUnfolderBase]: 351/693 cut-off events. [2024-01-27 15:54:00,171 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-01-27 15:54:00,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1589 conditions, 693 events. 351/693 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3648 event pairs, 90 based on Foata normal form. 1/564 useless extension candidates. Maximal degree in co-relation 1578. Up to 113 conditions per place. [2024-01-27 15:54:00,175 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 54 selfloop transitions, 11 changer transitions 23/93 dead transitions. [2024-01-27 15:54:00,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 93 transitions, 462 flow [2024-01-27 15:54:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:54:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:54:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-01-27 15:54:00,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482758620689655 [2024-01-27 15:54:00,179 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 108 flow. Second operand 10 states and 159 transitions. [2024-01-27 15:54:00,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 93 transitions, 462 flow [2024-01-27 15:54:00,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 93 transitions, 430 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-27 15:54:00,183 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 148 flow [2024-01-27 15:54:00,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-01-27 15:54:00,183 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-01-27 15:54:00,184 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 148 flow [2024-01-27 15:54:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:00,184 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] [2024-01-27 15:54:00,202 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 15:54:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:54:00,399 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 15:54:00,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash -932983080, now seen corresponding path program 3 times [2024-01-27 15:54:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:00,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443279774] [2024-01-27 15:54:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:00,479 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 15:54:00,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:00,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443279774] [2024-01-27 15:54:00,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443279774] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557143957] [2024-01-27 15:54:00,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:00,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:00,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:00,484 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 15:54:00,489 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 15:54:00,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:54:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:00,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:54:00,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:00,609 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 15:54:00,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:00,708 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 15:54:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557143957] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:00,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-01-27 15:54:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27871796] [2024-01-27 15:54:00,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:00,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:54:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:54:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:54:00,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:00,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:00,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:00,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:00,875 INFO L124 PetriNetUnfolderBase]: 683/1329 cut-off events. [2024-01-27 15:54:00,875 INFO L125 PetriNetUnfolderBase]: For 582/582 co-relation queries the response was YES. [2024-01-27 15:54:00,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 1329 events. 683/1329 cut-off events. For 582/582 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7804 event pairs, 234 based on Foata normal form. 20/1106 useless extension candidates. Maximal degree in co-relation 2962. Up to 458 conditions per place. [2024-01-27 15:54:00,881 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-01-27 15:54:00,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 65 transitions, 373 flow [2024-01-27 15:54:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:54:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:54:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-01-27 15:54:00,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-01-27 15:54:00,884 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 148 flow. Second operand 4 states and 77 transitions. [2024-01-27 15:54:00,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 65 transitions, 373 flow [2024-01-27 15:54:00,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 344 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-27 15:54:00,887 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 206 flow [2024-01-27 15:54:00,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-01-27 15:54:00,888 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-01-27 15:54:00,888 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 206 flow [2024-01-27 15:54:00,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:00,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:00,889 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] [2024-01-27 15:54:00,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:54:01,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:01,103 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 15:54:01,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1203621691, now seen corresponding path program 4 times [2024-01-27 15:54:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:01,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992561386] [2024-01-27 15:54:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:01,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992561386] [2024-01-27 15:54:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992561386] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323768355] [2024-01-27 15:54:01,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:54:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:01,590 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 15:54:01,615 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 15:54:01,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:54:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:01,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:54:01,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:01,739 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 15:54:01,935 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:01,935 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 23 treesize of output 10 [2024-01-27 15:54:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:01,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:02,386 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 39 treesize of output 35 [2024-01-27 15:54:02,404 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:54:02,404 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 51 treesize of output 43 [2024-01-27 15:54:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323768355] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:02,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:54:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471372478] [2024-01-27 15:54:02,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:02,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:54:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:54:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:54:02,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:02,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 206 flow. Second operand has 24 states, 24 states have (on average 9.333333333333334) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:02,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:02,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:02,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:03,675 INFO L124 PetriNetUnfolderBase]: 1173/2303 cut-off events. [2024-01-27 15:54:03,675 INFO L125 PetriNetUnfolderBase]: For 1714/1714 co-relation queries the response was YES. [2024-01-27 15:54:03,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5492 conditions, 2303 events. 1173/2303 cut-off events. For 1714/1714 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15077 event pairs, 270 based on Foata normal form. 54/1937 useless extension candidates. Maximal degree in co-relation 5480. Up to 352 conditions per place. [2024-01-27 15:54:03,684 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 101 selfloop transitions, 21 changer transitions 51/178 dead transitions. [2024-01-27 15:54:03,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 178 transitions, 972 flow [2024-01-27 15:54:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:54:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:54:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 284 transitions. [2024-01-27 15:54:03,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760649087221096 [2024-01-27 15:54:03,686 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 206 flow. Second operand 17 states and 284 transitions. [2024-01-27 15:54:03,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 178 transitions, 972 flow [2024-01-27 15:54:03,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 178 transitions, 960 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-27 15:54:03,690 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 352 flow [2024-01-27 15:54:03,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=352, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2024-01-27 15:54:03,691 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-01-27 15:54:03,691 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 352 flow [2024-01-27 15:54:03,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.333333333333334) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:03,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:03,692 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] [2024-01-27 15:54:03,711 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 15:54:03,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:03,911 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 15:54:03,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash -157615995, now seen corresponding path program 5 times [2024-01-27 15:54:03,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:03,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624455599] [2024-01-27 15:54:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:03,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:04,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:04,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624455599] [2024-01-27 15:54:04,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624455599] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:04,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615317638] [2024-01-27 15:54:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:54:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:04,358 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 15:54:04,375 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 15:54:04,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:54:04,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:04,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:54:04,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:04,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:04,552 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:54:04,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-01-27 15:54:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:04,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615317638] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:04,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:04,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2024-01-27 15:54:04,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265389775] [2024-01-27 15:54:04,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:04,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:54:04,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:54:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:54:04,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:04,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 352 flow. Second operand has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:04,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:04,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:04,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:05,298 INFO L124 PetriNetUnfolderBase]: 1407/2743 cut-off events. [2024-01-27 15:54:05,298 INFO L125 PetriNetUnfolderBase]: For 5212/5212 co-relation queries the response was YES. [2024-01-27 15:54:05,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7330 conditions, 2743 events. 1407/2743 cut-off events. For 5212/5212 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18089 event pairs, 314 based on Foata normal form. 7/2258 useless extension candidates. Maximal degree in co-relation 7310. Up to 523 conditions per place. [2024-01-27 15:54:05,312 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 94 selfloop transitions, 27 changer transitions 46/172 dead transitions. [2024-01-27 15:54:05,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 172 transitions, 1112 flow [2024-01-27 15:54:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:54:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:54:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 259 transitions. [2024-01-27 15:54:05,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954022988505747 [2024-01-27 15:54:05,315 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 352 flow. Second operand 15 states and 259 transitions. [2024-01-27 15:54:05,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 172 transitions, 1112 flow [2024-01-27 15:54:05,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 172 transitions, 1014 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-01-27 15:54:05,328 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 481 flow [2024-01-27 15:54:05,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=481, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2024-01-27 15:54:05,329 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 50 predicate places. [2024-01-27 15:54:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 481 flow [2024-01-27 15:54:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:05,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:05,330 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] [2024-01-27 15:54:05,348 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 15:54:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:05,545 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 15:54:05,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1204863891, now seen corresponding path program 6 times [2024-01-27 15:54:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:05,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265861971] [2024-01-27 15:54:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:54:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:05,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265861971] [2024-01-27 15:54:05,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265861971] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:05,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842191344] [2024-01-27 15:54:05,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:54:05,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:05,626 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 15:54:05,631 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 15:54:05,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:54:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:05,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:54:05,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:54:05,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:05,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842191344] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:05,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:05,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-01-27 15:54:05,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269891585] [2024-01-27 15:54:05,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:05,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:54:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:54:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:54:05,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:05,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 481 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:05,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:05,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:05,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:06,356 INFO L124 PetriNetUnfolderBase]: 2197/4224 cut-off events. [2024-01-27 15:54:06,356 INFO L125 PetriNetUnfolderBase]: For 10886/10886 co-relation queries the response was YES. [2024-01-27 15:54:06,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11792 conditions, 4224 events. 2197/4224 cut-off events. For 10886/10886 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 29940 event pairs, 618 based on Foata normal form. 50/3508 useless extension candidates. Maximal degree in co-relation 11766. Up to 1322 conditions per place. [2024-01-27 15:54:06,374 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 67 selfloop transitions, 32 changer transitions 5/109 dead transitions. [2024-01-27 15:54:06,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 1038 flow [2024-01-27 15:54:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:54:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:54:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-01-27 15:54:06,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6827586206896552 [2024-01-27 15:54:06,376 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 481 flow. Second operand 5 states and 99 transitions. [2024-01-27 15:54:06,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 1038 flow [2024-01-27 15:54:06,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 885 flow, removed 48 selfloop flow, removed 12 redundant places. [2024-01-27 15:54:06,389 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 583 flow [2024-01-27 15:54:06,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=583, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-01-27 15:54:06,390 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-01-27 15:54:06,390 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 583 flow [2024-01-27 15:54:06,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:06,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:06,391 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:06,412 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 15:54:06,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:06,612 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 15:54:06,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1741888420, now seen corresponding path program 7 times [2024-01-27 15:54:06,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:06,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643248236] [2024-01-27 15:54:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:06,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:06,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:06,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643248236] [2024-01-27 15:54:06,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643248236] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:06,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052958373] [2024-01-27 15:54:06,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:54:06,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:06,759 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 15:54:06,777 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 15:54:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:06,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:54:06,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:06,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052958373] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:07,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:07,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 15:54:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120494649] [2024-01-27 15:54:07,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:54:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:54:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:54:07,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:07,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 583 flow. Second operand has 18 states, 18 states have (on average 9.722222222222221) internal successors, (175), 18 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:07,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:07,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:07,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:07,556 INFO L124 PetriNetUnfolderBase]: 1641/3213 cut-off events. [2024-01-27 15:54:07,556 INFO L125 PetriNetUnfolderBase]: For 8467/8467 co-relation queries the response was YES. [2024-01-27 15:54:07,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9093 conditions, 3213 events. 1641/3213 cut-off events. For 8467/8467 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 21777 event pairs, 1320 based on Foata normal form. 8/2654 useless extension candidates. Maximal degree in co-relation 9068. Up to 2545 conditions per place. [2024-01-27 15:54:07,576 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 44 selfloop transitions, 4 changer transitions 41/94 dead transitions. [2024-01-27 15:54:07,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 753 flow [2024-01-27 15:54:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:54:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:54:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-01-27 15:54:07,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-01-27 15:54:07,578 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 583 flow. Second operand 8 states and 120 transitions. [2024-01-27 15:54:07,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 753 flow [2024-01-27 15:54:07,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 698 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-01-27 15:54:07,598 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 411 flow [2024-01-27 15:54:07,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=411, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2024-01-27 15:54:07,598 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2024-01-27 15:54:07,599 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 411 flow [2024-01-27 15:54:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.722222222222221) internal successors, (175), 18 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:07,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:07,601 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:07,616 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 15:54:07,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:07,816 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 15:54:07,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1434268923, now seen corresponding path program 8 times [2024-01-27 15:54:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:07,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120604116] [2024-01-27 15:54:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:08,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120604116] [2024-01-27 15:54:08,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120604116] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:08,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913281206] [2024-01-27 15:54:08,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:54:08,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:08,341 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 15:54:08,358 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 15:54:08,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:54:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:08,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:54:08,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:08,540 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 15:54:08,888 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-01-27 15:54:08,888 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 24 treesize of output 10 [2024-01-27 15:54:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:08,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:09,599 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 39 treesize of output 35 [2024-01-27 15:54:09,608 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:54:09,609 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 51 treesize of output 43 [2024-01-27 15:54:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:09,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913281206] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:09,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:09,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-01-27 15:54:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346245235] [2024-01-27 15:54:09,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:09,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:54:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:54:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:54:09,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:09,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 411 flow. Second operand has 33 states, 33 states have (on average 9.393939393939394) internal successors, (310), 33 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:09,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:09,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:09,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:12,743 INFO L124 PetriNetUnfolderBase]: 3896/7462 cut-off events. [2024-01-27 15:54:12,743 INFO L125 PetriNetUnfolderBase]: For 8970/8970 co-relation queries the response was YES. [2024-01-27 15:54:12,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19227 conditions, 7462 events. 3896/7462 cut-off events. For 8970/8970 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 58103 event pairs, 912 based on Foata normal form. 60/6215 useless extension candidates. Maximal degree in co-relation 19205. Up to 2129 conditions per place. [2024-01-27 15:54:12,776 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 51 selfloop transitions, 10 changer transitions 218/284 dead transitions. [2024-01-27 15:54:12,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 284 transitions, 1954 flow [2024-01-27 15:54:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:54:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:54:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 398 transitions. [2024-01-27 15:54:12,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967016491754122 [2024-01-27 15:54:12,780 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 411 flow. Second operand 23 states and 398 transitions. [2024-01-27 15:54:12,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 284 transitions, 1954 flow [2024-01-27 15:54:12,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 284 transitions, 1900 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-01-27 15:54:12,812 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 572 flow [2024-01-27 15:54:12,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=572, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2024-01-27 15:54:12,813 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2024-01-27 15:54:12,813 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 572 flow [2024-01-27 15:54:12,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.393939393939394) internal successors, (310), 33 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:12,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:12,814 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:12,830 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 15:54:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:54:13,030 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 15:54:13,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1530025952, now seen corresponding path program 9 times [2024-01-27 15:54:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518476354] [2024-01-27 15:54:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:14,101 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 15:54:14,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518476354] [2024-01-27 15:54:14,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518476354] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310748854] [2024-01-27 15:54:14,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:14,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:14,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:14,104 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 15:54:14,104 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 15:54:14,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:54:14,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:14,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-27 15:54:14,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:14,278 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 19 treesize of output 1 [2024-01-27 15:54:14,298 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 19 treesize of output 1 [2024-01-27 15:54:14,610 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-01-27 15:54:14,610 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 36 treesize of output 13 [2024-01-27 15:54:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:14,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:15,439 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 83 treesize of output 77 [2024-01-27 15:54:15,458 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-01-27 15:54:15,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 319 treesize of output 296 [2024-01-27 15:54:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:15,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310748854] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:15,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:15,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-01-27 15:54:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733056288] [2024-01-27 15:54:15,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:54:15,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:54:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:54:15,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:15,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 572 flow. Second operand has 34 states, 34 states have (on average 9.352941176470589) internal successors, (318), 34 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:15,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:15,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:15,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:19,313 INFO L124 PetriNetUnfolderBase]: 4791/9260 cut-off events. [2024-01-27 15:54:19,314 INFO L125 PetriNetUnfolderBase]: For 30427/30427 co-relation queries the response was YES. [2024-01-27 15:54:19,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27050 conditions, 9260 events. 4791/9260 cut-off events. For 30427/30427 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 75895 event pairs, 1062 based on Foata normal form. 84/7729 useless extension candidates. Maximal degree in co-relation 27013. Up to 2129 conditions per place. [2024-01-27 15:54:19,361 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 51 selfloop transitions, 9 changer transitions 399/464 dead transitions. [2024-01-27 15:54:19,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 464 transitions, 3641 flow [2024-01-27 15:54:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:54:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:54:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 658 transitions. [2024-01-27 15:54:19,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132339235787512 [2024-01-27 15:54:19,370 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 572 flow. Second operand 37 states and 658 transitions. [2024-01-27 15:54:19,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 464 transitions, 3641 flow [2024-01-27 15:54:19,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 464 transitions, 3117 flow, removed 254 selfloop flow, removed 15 redundant places. [2024-01-27 15:54:19,486 INFO L231 Difference]: Finished difference. Result has 130 places, 55 transitions, 607 flow [2024-01-27 15:54:19,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=607, PETRI_PLACES=130, PETRI_TRANSITIONS=55} [2024-01-27 15:54:19,487 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 102 predicate places. [2024-01-27 15:54:19,487 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 55 transitions, 607 flow [2024-01-27 15:54:19,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.352941176470589) internal successors, (318), 34 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:19,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:19,488 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:19,501 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 15:54:19,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:54:19,696 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 15:54:19,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash -203526555, now seen corresponding path program 10 times [2024-01-27 15:54:19,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:19,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354859514] [2024-01-27 15:54:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:19,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:20,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:20,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354859514] [2024-01-27 15:54:20,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354859514] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:20,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436990524] [2024-01-27 15:54:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:54:20,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:20,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:20,828 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 15:54:20,863 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 15:54:20,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:54:20,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:20,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:54:20,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:21,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:21,172 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:54:21,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-01-27 15:54:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:54:21,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436990524] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:21,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:21,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 23 [2024-01-27 15:54:21,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952659462] [2024-01-27 15:54:21,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:54:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:54:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:54:21,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:21,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 55 transitions, 607 flow. Second operand has 24 states, 24 states have (on average 9.416666666666666) internal successors, (226), 24 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:21,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:21,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:21,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:22,457 INFO L124 PetriNetUnfolderBase]: 2919/5526 cut-off events. [2024-01-27 15:54:22,457 INFO L125 PetriNetUnfolderBase]: For 57416/57416 co-relation queries the response was YES. [2024-01-27 15:54:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20136 conditions, 5526 events. 2919/5526 cut-off events. For 57416/57416 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 39620 event pairs, 306 based on Foata normal form. 12/4574 useless extension candidates. Maximal degree in co-relation 20081. Up to 832 conditions per place. [2024-01-27 15:54:22,494 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 107 selfloop transitions, 63 changer transitions 63/238 dead transitions. [2024-01-27 15:54:22,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 238 transitions, 2251 flow [2024-01-27 15:54:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:54:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:54:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 354 transitions. [2024-01-27 15:54:22,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2024-01-27 15:54:22,496 INFO L175 Difference]: Start difference. First operand has 130 places, 55 transitions, 607 flow. Second operand 21 states and 354 transitions. [2024-01-27 15:54:22,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 238 transitions, 2251 flow [2024-01-27 15:54:22,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 238 transitions, 1585 flow, removed 321 selfloop flow, removed 40 redundant places. [2024-01-27 15:54:22,669 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 1007 flow [2024-01-27 15:54:22,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1007, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-01-27 15:54:22,670 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-01-27 15:54:22,671 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 1007 flow [2024-01-27 15:54:22,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.416666666666666) internal successors, (226), 24 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:22,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:22,672 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:22,689 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 15:54:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:54:22,887 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 15:54:22,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash -717028941, now seen corresponding path program 11 times [2024-01-27 15:54:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:22,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840791846] [2024-01-27 15:54:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-27 15:54:22,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840791846] [2024-01-27 15:54:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840791846] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296842928] [2024-01-27 15:54:22,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:54:22,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:22,993 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 15:54:23,000 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 15:54:23,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:54:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:23,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:54:23,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-27 15:54:23,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:54:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296842928] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:23,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:23,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2024-01-27 15:54:23,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377598843] [2024-01-27 15:54:23,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:23,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:54:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:54:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:54:23,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:23,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 1007 flow. Second operand has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 13 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:23,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:23,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:24,255 INFO L124 PetriNetUnfolderBase]: 5435/10193 cut-off events. [2024-01-27 15:54:24,256 INFO L125 PetriNetUnfolderBase]: For 24119/24119 co-relation queries the response was YES. [2024-01-27 15:54:24,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28771 conditions, 10193 events. 5435/10193 cut-off events. For 24119/24119 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 80929 event pairs, 1130 based on Foata normal form. 20/8433 useless extension candidates. Maximal degree in co-relation 28736. Up to 2558 conditions per place. [2024-01-27 15:54:24,291 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 100 selfloop transitions, 80 changer transitions 0/185 dead transitions. [2024-01-27 15:54:24,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 185 transitions, 2311 flow [2024-01-27 15:54:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:54:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:54:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-01-27 15:54:24,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954022988505747 [2024-01-27 15:54:24,292 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 1007 flow. Second operand 6 states and 121 transitions. [2024-01-27 15:54:24,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 185 transitions, 2311 flow [2024-01-27 15:54:24,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 185 transitions, 2015 flow, removed 103 selfloop flow, removed 10 redundant places. [2024-01-27 15:54:24,343 INFO L231 Difference]: Finished difference. Result has 90 places, 133 transitions, 1625 flow [2024-01-27 15:54:24,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1625, PETRI_PLACES=90, PETRI_TRANSITIONS=133} [2024-01-27 15:54:24,343 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-01-27 15:54:24,344 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 133 transitions, 1625 flow [2024-01-27 15:54:24,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 13 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:24,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:24,344 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:24,362 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 15:54:24,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:54:24,562 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 15:54:24,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2059078274, now seen corresponding path program 12 times [2024-01-27 15:54:24,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:24,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042763186] [2024-01-27 15:54:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042763186] [2024-01-27 15:54:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042763186] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471600732] [2024-01-27 15:54:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:54:25,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:25,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:25,477 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 15:54:25,480 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 15:54:26,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-01-27 15:54:26,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:26,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:54:26,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:54:26,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:26,251 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:26,251 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 24 treesize of output 11 [2024-01-27 15:54:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:54:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471600732] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:26,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:26,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 10] total 29 [2024-01-27 15:54:26,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155619963] [2024-01-27 15:54:26,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:54:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:54:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:54:26,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:26,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 1625 flow. Second operand has 30 states, 30 states have (on average 9.633333333333333) internal successors, (289), 30 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:26,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:26,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:26,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:29,704 INFO L124 PetriNetUnfolderBase]: 10487/19773 cut-off events. [2024-01-27 15:54:29,704 INFO L125 PetriNetUnfolderBase]: For 43740/43740 co-relation queries the response was YES. [2024-01-27 15:54:29,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54994 conditions, 19773 events. 10487/19773 cut-off events. For 43740/43740 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 173007 event pairs, 898 based on Foata normal form. 16/16355 useless extension candidates. Maximal degree in co-relation 54959. Up to 3024 conditions per place. [2024-01-27 15:54:29,788 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 330 selfloop transitions, 225 changer transitions 99/659 dead transitions. [2024-01-27 15:54:29,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 659 transitions, 5929 flow [2024-01-27 15:54:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-01-27 15:54:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-01-27 15:54:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 817 transitions. [2024-01-27 15:54:29,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260536398467433 [2024-01-27 15:54:29,791 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 1625 flow. Second operand 45 states and 817 transitions. [2024-01-27 15:54:29,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 659 transitions, 5929 flow [2024-01-27 15:54:29,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 659 transitions, 5795 flow, removed 67 selfloop flow, removed 0 redundant places. [2024-01-27 15:54:29,941 INFO L231 Difference]: Finished difference. Result has 150 places, 260 transitions, 3706 flow [2024-01-27 15:54:29,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3706, PETRI_PLACES=150, PETRI_TRANSITIONS=260} [2024-01-27 15:54:29,941 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 122 predicate places. [2024-01-27 15:54:29,942 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 260 transitions, 3706 flow [2024-01-27 15:54:29,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.633333333333333) internal successors, (289), 30 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:29,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:29,942 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:29,957 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 15:54:30,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:54:30,157 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 15:54:30,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2041881610, now seen corresponding path program 13 times [2024-01-27 15:54:30,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:30,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618779810] [2024-01-27 15:54:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:30,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618779810] [2024-01-27 15:54:31,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618779810] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:31,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110418735] [2024-01-27 15:54:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:54:31,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:31,316 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 15:54:31,323 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 15:54:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:31,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:54:31,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:54:31,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:31,706 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:54:31,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-01-27 15:54:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:54:31,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110418735] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:31,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:31,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 28 [2024-01-27 15:54:31,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553586866] [2024-01-27 15:54:31,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:31,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:54:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:54:31,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:54:31,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:31,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 260 transitions, 3706 flow. Second operand has 29 states, 29 states have (on average 9.310344827586206) internal successors, (270), 29 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:31,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:31,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:31,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:35,994 INFO L124 PetriNetUnfolderBase]: 12783/23922 cut-off events. [2024-01-27 15:54:35,994 INFO L125 PetriNetUnfolderBase]: For 80089/80089 co-relation queries the response was YES. [2024-01-27 15:54:36,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69052 conditions, 23922 events. 12783/23922 cut-off events. For 80089/80089 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 214572 event pairs, 1426 based on Foata normal form. 29/19779 useless extension candidates. Maximal degree in co-relation 69000. Up to 3680 conditions per place. [2024-01-27 15:54:36,093 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 142 selfloop transitions, 285 changer transitions 104/536 dead transitions. [2024-01-27 15:54:36,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 536 transitions, 5942 flow [2024-01-27 15:54:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:54:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:54:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 495 transitions. [2024-01-27 15:54:36,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096059113300493 [2024-01-27 15:54:36,096 INFO L175 Difference]: Start difference. First operand has 150 places, 260 transitions, 3706 flow. Second operand 28 states and 495 transitions. [2024-01-27 15:54:36,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 536 transitions, 5942 flow [2024-01-27 15:54:36,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 536 transitions, 5252 flow, removed 132 selfloop flow, removed 15 redundant places. [2024-01-27 15:54:36,361 INFO L231 Difference]: Finished difference. Result has 178 places, 308 transitions, 4778 flow [2024-01-27 15:54:36,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4778, PETRI_PLACES=178, PETRI_TRANSITIONS=308} [2024-01-27 15:54:36,362 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 150 predicate places. [2024-01-27 15:54:36,362 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 308 transitions, 4778 flow [2024-01-27 15:54:36,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.310344827586206) internal successors, (270), 29 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:36,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:36,363 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:36,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:36,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:54:36,569 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 15:54:36,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1878020626, now seen corresponding path program 14 times [2024-01-27 15:54:36,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:36,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356293494] [2024-01-27 15:54:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-27 15:54:36,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356293494] [2024-01-27 15:54:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356293494] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950532243] [2024-01-27 15:54:36,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:54:36,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:36,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:36,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:36,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:54:36,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:54:36,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:36,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:54:36,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-27 15:54:36,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:54:37,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950532243] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:37,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:37,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2024-01-27 15:54:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746230220] [2024-01-27 15:54:37,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:37,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:54:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:54:37,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:54:37,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:37,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 308 transitions, 4778 flow. Second operand has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:37,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:37,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:37,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:43,050 INFO L124 PetriNetUnfolderBase]: 19891/37087 cut-off events. [2024-01-27 15:54:43,050 INFO L125 PetriNetUnfolderBase]: For 129349/129349 co-relation queries the response was YES. [2024-01-27 15:54:43,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111274 conditions, 37087 events. 19891/37087 cut-off events. For 129349/129349 co-relation queries the response was YES. Maximal size of possible extension queue 1415. Compared 352645 event pairs, 3338 based on Foata normal form. 20/30643 useless extension candidates. Maximal degree in co-relation 111207. Up to 7808 conditions per place. [2024-01-27 15:54:43,283 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 163 selfloop transitions, 335 changer transitions 0/503 dead transitions. [2024-01-27 15:54:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 503 transitions, 8726 flow [2024-01-27 15:54:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:54:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:54:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-01-27 15:54:43,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044334975369458 [2024-01-27 15:54:43,285 INFO L175 Difference]: Start difference. First operand has 178 places, 308 transitions, 4778 flow. Second operand 7 states and 143 transitions. [2024-01-27 15:54:43,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 503 transitions, 8726 flow [2024-01-27 15:54:43,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 503 transitions, 7912 flow, removed 200 selfloop flow, removed 26 redundant places. [2024-01-27 15:54:43,870 INFO L231 Difference]: Finished difference. Result has 159 places, 438 transitions, 7306 flow [2024-01-27 15:54:43,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7306, PETRI_PLACES=159, PETRI_TRANSITIONS=438} [2024-01-27 15:54:43,870 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 131 predicate places. [2024-01-27 15:54:43,870 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 438 transitions, 7306 flow [2024-01-27 15:54:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:43,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:43,871 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:43,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-27 15:54:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:44,071 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 15:54:44,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1054298989, now seen corresponding path program 15 times [2024-01-27 15:54:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:44,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895678986] [2024-01-27 15:54:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895678986] [2024-01-27 15:54:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895678986] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770631112] [2024-01-27 15:54:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:44,994 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:45,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:54:45,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-01-27 15:54:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:45,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:54:45,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-27 15:54:45,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:45,922 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:45,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-01-27 15:54:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-27 15:54:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770631112] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:46,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-01-27 15:54:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029548274] [2024-01-27 15:54:46,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:46,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-01-27 15:54:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-01-27 15:54:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2024-01-27 15:54:46,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:46,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 438 transitions, 7306 flow. Second operand has 45 states, 45 states have (on average 9.066666666666666) internal successors, (408), 45 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:46,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:46,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:46,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:54,051 INFO L124 PetriNetUnfolderBase]: 17632/34357 cut-off events. [2024-01-27 15:54:54,051 INFO L125 PetriNetUnfolderBase]: For 125615/125615 co-relation queries the response was YES. [2024-01-27 15:54:54,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100807 conditions, 34357 events. 17632/34357 cut-off events. For 125615/125615 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 338471 event pairs, 5610 based on Foata normal form. 652/28996 useless extension candidates. Maximal degree in co-relation 100753. Up to 17999 conditions per place. [2024-01-27 15:54:54,219 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 312 selfloop transitions, 36 changer transitions 352/705 dead transitions. [2024-01-27 15:54:54,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 705 transitions, 8803 flow [2024-01-27 15:54:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:54:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:54:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 640 transitions. [2024-01-27 15:54:54,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807622504537205 [2024-01-27 15:54:54,231 INFO L175 Difference]: Start difference. First operand has 159 places, 438 transitions, 7306 flow. Second operand 38 states and 640 transitions. [2024-01-27 15:54:54,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 705 transitions, 8803 flow [2024-01-27 15:54:54,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 705 transitions, 8560 flow, removed 119 selfloop flow, removed 1 redundant places. [2024-01-27 15:54:54,944 INFO L231 Difference]: Finished difference. Result has 211 places, 265 transitions, 4317 flow [2024-01-27 15:54:54,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4317, PETRI_PLACES=211, PETRI_TRANSITIONS=265} [2024-01-27 15:54:54,945 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 183 predicate places. [2024-01-27 15:54:54,945 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 265 transitions, 4317 flow [2024-01-27 15:54:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 9.066666666666666) internal successors, (408), 45 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:54,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:54,945 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:54,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:55,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:55,146 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:55,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash 125694725, now seen corresponding path program 16 times [2024-01-27 15:54:55,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:55,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226227226] [2024-01-27 15:54:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226227226] [2024-01-27 15:54:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226227226] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349485431] [2024-01-27 15:54:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:54:55,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:55,912 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:55,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:54:56,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:54:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:56,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:54:56,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:56,170 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 15:54:56,783 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:56,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-01-27 15:54:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:56,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:57,474 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 39 treesize of output 35 [2024-01-27 15:54:57,483 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:54:57,483 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 51 treesize of output 43 [2024-01-27 15:54:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:57,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349485431] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:57,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:57,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2024-01-27 15:54:57,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638410554] [2024-01-27 15:54:57,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:57,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-01-27 15:54:57,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:57,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-01-27 15:54:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2024-01-27 15:54:57,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:57,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 265 transitions, 4317 flow. Second operand has 51 states, 51 states have (on average 9.137254901960784) internal successors, (466), 51 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:57,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:57,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:57,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:03,298 INFO L124 PetriNetUnfolderBase]: 11646/22284 cut-off events. [2024-01-27 15:55:03,298 INFO L125 PetriNetUnfolderBase]: For 101862/101862 co-relation queries the response was YES. [2024-01-27 15:55:03,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69803 conditions, 22284 events. 11646/22284 cut-off events. For 101862/101862 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 201477 event pairs, 5634 based on Foata normal form. 1/18450 useless extension candidates. Maximal degree in co-relation 69732. Up to 17999 conditions per place. [2024-01-27 15:55:03,438 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 303 selfloop transitions, 27 changer transitions 129/464 dead transitions. [2024-01-27 15:55:03,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 464 transitions, 5818 flow [2024-01-27 15:55:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:55:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:55:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 424 transitions. [2024-01-27 15:55:03,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623342175066313 [2024-01-27 15:55:03,440 INFO L175 Difference]: Start difference. First operand has 211 places, 265 transitions, 4317 flow. Second operand 26 states and 424 transitions. [2024-01-27 15:55:03,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 464 transitions, 5818 flow [2024-01-27 15:55:04,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 464 transitions, 5349 flow, removed 94 selfloop flow, removed 46 redundant places. [2024-01-27 15:55:04,130 INFO L231 Difference]: Finished difference. Result has 163 places, 259 transitions, 3864 flow [2024-01-27 15:55:04,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3864, PETRI_PLACES=163, PETRI_TRANSITIONS=259} [2024-01-27 15:55:04,131 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 135 predicate places. [2024-01-27 15:55:04,131 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 259 transitions, 3864 flow [2024-01-27 15:55:04,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 9.137254901960784) internal successors, (466), 51 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:04,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:04,131 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:04,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:55:04,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:04,332 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:04,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1681333975, now seen corresponding path program 17 times [2024-01-27 15:55:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463027938] [2024-01-27 15:55:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:05,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:05,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463027938] [2024-01-27 15:55:05,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463027938] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832463244] [2024-01-27 15:55:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:05,107 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:55:05,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-27 15:55:05,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:05,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-27 15:55:05,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-27 15:55:05,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:05,658 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:55:05,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-01-27 15:55:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-01-27 15:55:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832463244] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:05,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:05,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 28 [2024-01-27 15:55:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562365088] [2024-01-27 15:55:05,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:05,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:55:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:55:05,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:55:05,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:05,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 259 transitions, 3864 flow. Second operand has 29 states, 29 states have (on average 9.482758620689655) internal successors, (275), 29 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:05,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:05,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:05,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:09,796 INFO L124 PetriNetUnfolderBase]: 13248/24869 cut-off events. [2024-01-27 15:55:09,797 INFO L125 PetriNetUnfolderBase]: For 104132/104132 co-relation queries the response was YES. [2024-01-27 15:55:09,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77394 conditions, 24869 events. 13248/24869 cut-off events. For 104132/104132 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 221789 event pairs, 1370 based on Foata normal form. 11/20544 useless extension candidates. Maximal degree in co-relation 77343. Up to 4010 conditions per place. [2024-01-27 15:55:09,899 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 85 selfloop transitions, 252 changer transitions 147/489 dead transitions. [2024-01-27 15:55:09,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 489 transitions, 5943 flow [2024-01-27 15:55:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:55:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:55:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 433 transitions. [2024-01-27 15:55:09,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972413793103448 [2024-01-27 15:55:09,901 INFO L175 Difference]: Start difference. First operand has 163 places, 259 transitions, 3864 flow. Second operand 25 states and 433 transitions. [2024-01-27 15:55:09,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 489 transitions, 5943 flow [2024-01-27 15:55:11,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 489 transitions, 5792 flow, removed 48 selfloop flow, removed 20 redundant places. [2024-01-27 15:55:11,010 INFO L231 Difference]: Finished difference. Result has 171 places, 277 transitions, 5174 flow [2024-01-27 15:55:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5174, PETRI_PLACES=171, PETRI_TRANSITIONS=277} [2024-01-27 15:55:11,011 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 143 predicate places. [2024-01-27 15:55:11,011 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 277 transitions, 5174 flow [2024-01-27 15:55:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.482758620689655) internal successors, (275), 29 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:11,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:11,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:11,212 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:11,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 489047264, now seen corresponding path program 18 times [2024-01-27 15:55:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893963072] [2024-01-27 15:55:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:12,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893963072] [2024-01-27 15:55:12,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893963072] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:12,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689281774] [2024-01-27 15:55:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:12,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:12,306 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:12,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:55:12,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-01-27 15:55:12,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:12,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:55:12,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:12,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:12,886 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:55:12,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-01-27 15:55:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:55:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689281774] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:12,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:12,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 12] total 34 [2024-01-27 15:55:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53000890] [2024-01-27 15:55:12,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:55:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:55:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:55:12,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:12,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 277 transitions, 5174 flow. Second operand has 35 states, 35 states have (on average 9.2) internal successors, (322), 35 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:12,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:12,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:12,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:19,950 INFO L124 PetriNetUnfolderBase]: 20419/38160 cut-off events. [2024-01-27 15:55:19,951 INFO L125 PetriNetUnfolderBase]: For 186737/186737 co-relation queries the response was YES. [2024-01-27 15:55:20,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124334 conditions, 38160 events. 20419/38160 cut-off events. For 186737/186737 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 360778 event pairs, 1722 based on Foata normal form. 1/31555 useless extension candidates. Maximal degree in co-relation 124274. Up to 5840 conditions per place. [2024-01-27 15:55:20,164 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 171 selfloop transitions, 411 changer transitions 131/718 dead transitions. [2024-01-27 15:55:20,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 718 transitions, 10403 flow [2024-01-27 15:55:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:55:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:55:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 587 transitions. [2024-01-27 15:55:20,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953346855983773 [2024-01-27 15:55:20,166 INFO L175 Difference]: Start difference. First operand has 171 places, 277 transitions, 5174 flow. Second operand 34 states and 587 transitions. [2024-01-27 15:55:20,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 718 transitions, 10403 flow [2024-01-27 15:55:21,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 718 transitions, 9474 flow, removed 83 selfloop flow, removed 27 redundant places. [2024-01-27 15:55:21,344 INFO L231 Difference]: Finished difference. Result has 157 places, 434 transitions, 8161 flow [2024-01-27 15:55:21,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8161, PETRI_PLACES=157, PETRI_TRANSITIONS=434} [2024-01-27 15:55:21,344 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2024-01-27 15:55:21,344 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 434 transitions, 8161 flow [2024-01-27 15:55:21,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.2) internal successors, (322), 35 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:21,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:21,345 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:21,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:55:21,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:21,546 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:21,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1273277096, now seen corresponding path program 19 times [2024-01-27 15:55:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:21,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591073509] [2024-01-27 15:55:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:21,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-01-27 15:55:21,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:21,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591073509] [2024-01-27 15:55:21,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591073509] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:21,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180195008] [2024-01-27 15:55:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:21,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:21,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:21,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:21,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:55:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:22,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:55:22,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-01-27 15:55:22,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 34 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:55:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180195008] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:22,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 12] total 18 [2024-01-27 15:55:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354206187] [2024-01-27 15:55:22,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:55:22,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:55:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:55:22,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:22,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 434 transitions, 8161 flow. Second operand has 19 states, 19 states have (on average 10.631578947368421) internal successors, (202), 19 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:22,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:22,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:22,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:31,687 INFO L124 PetriNetUnfolderBase]: 34191/63638 cut-off events. [2024-01-27 15:55:31,688 INFO L125 PetriNetUnfolderBase]: For 312615/312615 co-relation queries the response was YES.