./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-4.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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:58:32,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:58:32,713 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:58:32,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:58:32,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:58:32,745 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:58:32,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:58:32,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:58:32,748 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:58:32,752 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:58:32,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:58:32,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:58:32,753 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:58:32,754 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:58:32,754 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:58:32,754 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:58:32,754 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:58:32,755 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:58:32,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:58:32,755 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:58:32,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:58:32,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:58:32,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:58:32,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:58:32,756 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:58:32,756 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:58:32,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:58:32,757 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:58:32,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:58:32,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:58:32,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:58:32,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:58:32,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:58:32,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:58:32,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:58:32,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:58:32,760 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:58:32,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:58:32,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:58:32,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:58:32,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:58:32,761 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:58:32,761 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:58:32,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-01-27 15:58:32,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:58:32,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:58:32,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:58:32,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:58:32,978 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:58:32,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2024-01-27 15:58:34,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:58:34,187 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:58:34,187 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2024-01-27 15:58:34,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506870556/deb8f5fbd65f4a4b9bcaba674cd1ed9a/FLAGd2858f74c [2024-01-27 15:58:34,202 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506870556/deb8f5fbd65f4a4b9bcaba674cd1ed9a [2024-01-27 15:58:34,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:58:34,205 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:58:34,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:58:34,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:58:34,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:58:34,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1730e7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34, skipping insertion in model container [2024-01-27 15:58:34,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,228 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:58:34,346 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c[2834,2847] [2024-01-27 15:58:34,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:58:34,360 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:58:34,380 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c[2834,2847] [2024-01-27 15:58:34,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:58:34,393 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:58:34,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34 WrapperNode [2024-01-27 15:58:34,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:58:34,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:58:34,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:58:34,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:58:34,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,430 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 188 [2024-01-27 15:58:34,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:58:34,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:58:34,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:58:34,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:58:34,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,472 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,508 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 2, 9, 2]. 60 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 15:58:34,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:58:34,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:58:34,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:58:34,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:58:34,555 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (1/1) ... [2024-01-27 15:58:34,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:58:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:34,625 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 15:58:34,641 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 15:58:34,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:58:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:58:34,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:58:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:58:34,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:58:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:58:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:58:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:58:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:58:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:58:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:58:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:58:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:58:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:58:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:58:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:58:34,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:58:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:58:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:58:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:58:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:58:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:58:34,683 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 15:58:34,765 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:58:34,767 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:58:34,997 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:58:34,997 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:58:35,213 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:58:35,214 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:58:35,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:58:35 BoogieIcfgContainer [2024-01-27 15:58:35,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:58:35,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:58:35,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:58:35,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:58:35,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:58:34" (1/3) ... [2024-01-27 15:58:35,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4271681f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:58:35, skipping insertion in model container [2024-01-27 15:58:35,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:34" (2/3) ... [2024-01-27 15:58:35,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4271681f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:58:35, skipping insertion in model container [2024-01-27 15:58:35,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:58:35" (3/3) ... [2024-01-27 15:58:35,223 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-01-27 15:58:35,229 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:58:35,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:58:35,236 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:58:35,236 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:58:35,278 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:58:35,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:58:35,336 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:58:35,336 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:35,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:58:35,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:58:35,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:58:35,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:58:35,361 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;@54b7d22d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:58:35,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:58:35,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:58:35,373 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:58:35,373 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:35,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:35,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:35,374 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 15:58:35,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1831583878, now seen corresponding path program 1 times [2024-01-27 15:58:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:35,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934525989] [2024-01-27 15:58:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:35,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:35,747 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 15:58:35,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:35,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934525989] [2024-01-27 15:58:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934525989] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:35,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:35,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:58:35,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224662739] [2024-01-27 15:58:35,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:58:35,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:58:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:58:35,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:35,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:35,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:35,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:35,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:35,898 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2024-01-27 15:58:35,899 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:58:35,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2024-01-27 15:58:35,902 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-27 15:58:35,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2024-01-27 15:58:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:58:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:58:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-27 15:58:35,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:58:35,913 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2024-01-27 15:58:35,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2024-01-27 15:58:35,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:35,917 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2024-01-27 15:58:35,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-01-27 15:58:35,922 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-27 15:58:35,922 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2024-01-27 15:58:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:35,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:35,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:35,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:58:35,924 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 15:58:35,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1293956475, now seen corresponding path program 1 times [2024-01-27 15:58:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:35,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057524325] [2024-01-27 15:58:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:36,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057524325] [2024-01-27 15:58:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057524325] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:36,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:36,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:36,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223837504] [2024-01-27 15:58:36,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:36,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:36,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:36,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:36,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:36,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:36,338 INFO L124 PetriNetUnfolderBase]: 72/137 cut-off events. [2024-01-27 15:58:36,339 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:36,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 137 events. 72/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 366 event pairs, 24 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 276. Up to 77 conditions per place. [2024-01-27 15:58:36,341 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 35 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-01-27 15:58:36,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 41 transitions, 181 flow [2024-01-27 15:58:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-01-27 15:58:36,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 15:58:36,344 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 5 states and 55 transitions. [2024-01-27 15:58:36,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 41 transitions, 181 flow [2024-01-27 15:58:36,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 177 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:36,347 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 84 flow [2024-01-27 15:58:36,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2024-01-27 15:58:36,348 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2024-01-27 15:58:36,348 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 84 flow [2024-01-27 15:58:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:36,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:58:36,352 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 15:58:36,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash 369372029, now seen corresponding path program 2 times [2024-01-27 15:58:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:36,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28480363] [2024-01-27 15:58:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:36,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:36,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28480363] [2024-01-27 15:58:36,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28480363] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:36,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:36,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:36,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269352031] [2024-01-27 15:58:36,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:36,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:36,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:36,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:36,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:36,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:36,718 INFO L124 PetriNetUnfolderBase]: 109/201 cut-off events. [2024-01-27 15:58:36,718 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-01-27 15:58:36,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 201 events. 109/201 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 605 event pairs, 24 based on Foata normal form. 2/164 useless extension candidates. Maximal degree in co-relation 563. Up to 87 conditions per place. [2024-01-27 15:58:36,721 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2024-01-27 15:58:36,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 53 transitions, 294 flow [2024-01-27 15:58:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:58:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:58:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-01-27 15:58:36,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 15:58:36,724 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 84 flow. Second operand 6 states and 66 transitions. [2024-01-27 15:58:36,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 53 transitions, 294 flow [2024-01-27 15:58:36,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 277 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:36,729 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 165 flow [2024-01-27 15:58:36,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-01-27 15:58:36,731 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2024-01-27 15:58:36,731 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 165 flow [2024-01-27 15:58:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:36,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:58:36,731 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 15:58:36,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1107544109, now seen corresponding path program 3 times [2024-01-27 15:58:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562021083] [2024-01-27 15:58:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562021083] [2024-01-27 15:58:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562021083] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:36,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:36,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:36,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509066930] [2024-01-27 15:58:36,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:36,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:36,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:36,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:36,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:36,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:36,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:37,009 INFO L124 PetriNetUnfolderBase]: 119/217 cut-off events. [2024-01-27 15:58:37,010 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-01-27 15:58:37,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 217 events. 119/217 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 696 event pairs, 28 based on Foata normal form. 4/190 useless extension candidates. Maximal degree in co-relation 781. Up to 111 conditions per place. [2024-01-27 15:58:37,015 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-01-27 15:58:37,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 378 flow [2024-01-27 15:58:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-01-27 15:58:37,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-27 15:58:37,016 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 165 flow. Second operand 5 states and 56 transitions. [2024-01-27 15:58:37,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 378 flow [2024-01-27 15:58:37,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 364 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-01-27 15:58:37,021 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 257 flow [2024-01-27 15:58:37,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-01-27 15:58:37,021 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-01-27 15:58:37,022 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 257 flow [2024-01-27 15:58:37,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:37,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:37,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:58:37,022 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 15:58:37,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash -474636351, now seen corresponding path program 4 times [2024-01-27 15:58:37,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:37,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793746108] [2024-01-27 15:58:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:37,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793746108] [2024-01-27 15:58:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793746108] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:37,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:37,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157483246] [2024-01-27 15:58:37,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:37,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:37,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:37,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:37,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:37,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:37,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:37,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:37,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:37,242 INFO L124 PetriNetUnfolderBase]: 115/213 cut-off events. [2024-01-27 15:58:37,242 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2024-01-27 15:58:37,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 213 events. 115/213 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 659 event pairs, 36 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 851. Up to 167 conditions per place. [2024-01-27 15:58:37,244 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2024-01-27 15:58:37,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 432 flow [2024-01-27 15:58:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-27 15:58:37,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:37,247 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 257 flow. Second operand 5 states and 50 transitions. [2024-01-27 15:58:37,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 432 flow [2024-01-27 15:58:37,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 416 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:37,254 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 349 flow [2024-01-27 15:58:37,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-01-27 15:58:37,256 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-01-27 15:58:37,256 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 349 flow [2024-01-27 15:58:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:37,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:37,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:58:37,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:37,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash -9811565, now seen corresponding path program 5 times [2024-01-27 15:58:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:37,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880131280] [2024-01-27 15:58:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880131280] [2024-01-27 15:58:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880131280] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:37,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:37,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:37,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191144326] [2024-01-27 15:58:37,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:37,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:37,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:37,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:37,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 349 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:37,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:37,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:37,503 INFO L124 PetriNetUnfolderBase]: 116/216 cut-off events. [2024-01-27 15:58:37,504 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-01-27 15:58:37,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 216 events. 116/216 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 713 event pairs, 24 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 923. Up to 113 conditions per place. [2024-01-27 15:58:37,505 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 41 selfloop transitions, 15 changer transitions 0/57 dead transitions. [2024-01-27 15:58:37,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 505 flow [2024-01-27 15:58:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2024-01-27 15:58:37,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-01-27 15:58:37,508 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 349 flow. Second operand 5 states and 54 transitions. [2024-01-27 15:58:37,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 505 flow [2024-01-27 15:58:37,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 462 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:37,511 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 346 flow [2024-01-27 15:58:37,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-01-27 15:58:37,514 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2024-01-27 15:58:37,514 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 346 flow [2024-01-27 15:58:37,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:37,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:37,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:58:37,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:37,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1243112709, now seen corresponding path program 6 times [2024-01-27 15:58:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:37,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282490735] [2024-01-27 15:58:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:37,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282490735] [2024-01-27 15:58:37,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282490735] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:37,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:37,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:37,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024432089] [2024-01-27 15:58:37,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:37,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:37,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:37,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:37,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:37,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:37,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:37,763 INFO L124 PetriNetUnfolderBase]: 115/208 cut-off events. [2024-01-27 15:58:37,763 INFO L125 PetriNetUnfolderBase]: For 770/770 co-relation queries the response was YES. [2024-01-27 15:58:37,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 208 events. 115/208 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 622 event pairs, 35 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 886. Up to 160 conditions per place. [2024-01-27 15:58:37,765 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 34 selfloop transitions, 18 changer transitions 0/53 dead transitions. [2024-01-27 15:58:37,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 474 flow [2024-01-27 15:58:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-27 15:58:37,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:37,766 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 346 flow. Second operand 5 states and 50 transitions. [2024-01-27 15:58:37,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 474 flow [2024-01-27 15:58:37,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 440 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:58:37,769 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 352 flow [2024-01-27 15:58:37,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-01-27 15:58:37,770 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2024-01-27 15:58:37,770 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 352 flow [2024-01-27 15:58:37,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:37,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:37,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:58:37,770 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:37,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash -277612712, now seen corresponding path program 1 times [2024-01-27 15:58:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:37,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799208046] [2024-01-27 15:58:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:37,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799208046] [2024-01-27 15:58:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799208046] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889256502] [2024-01-27 15:58:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:37,899 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 15:58:37,955 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 15:58:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:38,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:58:38,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:38,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:38,988 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-01-27 15:58:38,989 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 178 treesize of output 169 [2024-01-27 15:58:51,892 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:59:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:06,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:19,666 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:59:27,676 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:59:32,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-27 15:59:32,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:32,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-01-27 15:59:33,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:59:33,315 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:59:33,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-01-27 15:59:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:33,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889256502] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:33,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:33,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-27 15:59:33,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188207600] [2024-01-27 15:59:33,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:33,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:59:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:59:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:59:33,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:33,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 352 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:33,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:33,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:33,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:39,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:45,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:49,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:54,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:54,449 INFO L124 PetriNetUnfolderBase]: 360/650 cut-off events. [2024-01-27 15:59:54,449 INFO L125 PetriNetUnfolderBase]: For 1829/1829 co-relation queries the response was YES. [2024-01-27 15:59:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2650 conditions, 650 events. 360/650 cut-off events. For 1829/1829 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2904 event pairs, 12 based on Foata normal form. 11/561 useless extension candidates. Maximal degree in co-relation 2339. Up to 165 conditions per place. [2024-01-27 15:59:54,453 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 96 selfloop transitions, 52 changer transitions 68/217 dead transitions. [2024-01-27 15:59:54,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 217 transitions, 1702 flow [2024-01-27 15:59:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:59:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:59:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 267 transitions. [2024-01-27 15:59:54,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-01-27 15:59:54,456 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 352 flow. Second operand 28 states and 267 transitions. [2024-01-27 15:59:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 217 transitions, 1702 flow [2024-01-27 15:59:54,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 217 transitions, 1594 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:59:54,468 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 756 flow [2024-01-27 15:59:54,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=756, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-01-27 15:59:54,469 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2024-01-27 15:59:54,471 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 756 flow [2024-01-27 15:59:54,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:54,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:54,472 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 15:59:54,494 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 15:59:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:54,673 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 15:59:54,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1246178956, now seen corresponding path program 2 times [2024-01-27 15:59:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:54,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785504283] [2024-01-27 15:59:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:54,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:54,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785504283] [2024-01-27 15:59:54,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785504283] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:54,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620895119] [2024-01-27 15:59:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:59:54,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:54,813 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 15:59:54,814 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 15:59:54,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:59:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:54,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:59:54,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:54,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:59:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:55,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:09,335 WARN L293 SmtUtils]: Spent 12.52s on a formula simplification. DAG size of input: 29 DAG size of output: 20 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-01-27 16:00:21,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2024-01-27 16:00:22,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:00:22,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 592 treesize of output 490 [2024-01-27 16:00:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620895119] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:39,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-01-27 16:00:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292508374] [2024-01-27 16:00:39,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:00:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:00:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:00:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:39,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 756 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:39,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:39,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:41,888 INFO L124 PetriNetUnfolderBase]: 327/625 cut-off events. [2024-01-27 16:00:41,888 INFO L125 PetriNetUnfolderBase]: For 4145/4145 co-relation queries the response was YES. [2024-01-27 16:00:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 625 events. 327/625 cut-off events. For 4145/4145 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2865 event pairs, 33 based on Foata normal form. 15/581 useless extension candidates. Maximal degree in co-relation 3204. Up to 219 conditions per place. [2024-01-27 16:00:41,893 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 110 selfloop transitions, 87 changer transitions 21/219 dead transitions. [2024-01-27 16:00:41,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 219 transitions, 2087 flow [2024-01-27 16:00:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 16:00:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 16:00:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 286 transitions. [2024-01-27 16:00:41,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-01-27 16:00:41,895 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 756 flow. Second operand 32 states and 286 transitions. [2024-01-27 16:00:41,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 219 transitions, 2087 flow [2024-01-27 16:00:41,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 219 transitions, 1850 flow, removed 97 selfloop flow, removed 9 redundant places. [2024-01-27 16:00:41,905 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 1279 flow [2024-01-27 16:00:41,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1279, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2024-01-27 16:00:41,906 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 92 predicate places. [2024-01-27 16:00:41,906 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 1279 flow [2024-01-27 16:00:41,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:41,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:41,907 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 16:00:41,921 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 16:00:42,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-01-27 16:00:42,119 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 16:00:42,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1414773710, now seen corresponding path program 3 times [2024-01-27 16:00:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:42,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101340042] [2024-01-27 16:00:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:00:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101340042] [2024-01-27 16:00:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101340042] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007747884] [2024-01-27 16:00:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:00:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:42,425 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 16:00:42,426 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 16:00:42,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 16:00:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:42,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 16:00:42,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:42,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:00:51,337 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:59,348 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:01:15,531 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 40 treesize of output 28 [2024-01-27 16:01:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:15,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:22,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-27 16:01:22,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:01:22,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-01-27 16:01:23,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 16:01:23,376 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 16:01:23,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-01-27 16:01:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:23,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007747884] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:23,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:23,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-27 16:01:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238596273] [2024-01-27 16:01:23,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 16:01:23,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 16:01:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-01-27 16:01:23,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:01:23,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 1279 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:23,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:23,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:01:23,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:27,047 INFO L124 PetriNetUnfolderBase]: 375/785 cut-off events. [2024-01-27 16:01:27,047 INFO L125 PetriNetUnfolderBase]: For 3766/3766 co-relation queries the response was YES. [2024-01-27 16:01:27,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3963 conditions, 785 events. 375/785 cut-off events. For 3766/3766 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4225 event pairs, 10 based on Foata normal form. 9/714 useless extension candidates. Maximal degree in co-relation 3742. Up to 235 conditions per place. [2024-01-27 16:01:27,053 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 102 selfloop transitions, 101 changer transitions 49/253 dead transitions. [2024-01-27 16:01:27,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 253 transitions, 2566 flow [2024-01-27 16:01:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 16:01:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 16:01:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 282 transitions. [2024-01-27 16:01:27,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2024-01-27 16:01:27,054 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 1279 flow. Second operand 34 states and 282 transitions. [2024-01-27 16:01:27,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 253 transitions, 2566 flow [2024-01-27 16:01:27,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 253 transitions, 2279 flow, removed 79 selfloop flow, removed 9 redundant places. [2024-01-27 16:01:27,071 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1586 flow [2024-01-27 16:01:27,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1586, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2024-01-27 16:01:27,071 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2024-01-27 16:01:27,072 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1586 flow [2024-01-27 16:01:27,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:27,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:27,072 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 16:01:27,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:27,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:27,284 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 16:01:27,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2101891860, now seen corresponding path program 4 times [2024-01-27 16:01:27,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:27,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856226402] [2024-01-27 16:01:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:27,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:01:27,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:27,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856226402] [2024-01-27 16:01:27,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856226402] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:27,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661769857] [2024-01-27 16:01:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:01:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:27,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:27,584 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 16:01:27,585 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 16:01:27,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:01:27,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:01:27,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 16:01:27,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:27,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:01:41,010 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:01:57,058 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:02:05,068 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:02:13,106 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:02:13,749 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 42 treesize of output 30 [2024-01-27 16:02:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:02:13,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:02:14,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 16:02:14,188 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 16:02:14,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 16:02:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:02:14,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661769857] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:02:14,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:02:14,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-27 16:02:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372240356] [2024-01-27 16:02:14,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:02:14,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 16:02:14,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:02:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 16:02:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-01-27 16:02:14,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:02:14,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1586 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:02:14,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:02:14,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:02:14,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:02:15,749 INFO L124 PetriNetUnfolderBase]: 352/754 cut-off events. [2024-01-27 16:02:15,749 INFO L125 PetriNetUnfolderBase]: For 4472/4472 co-relation queries the response was YES. [2024-01-27 16:02:15,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 754 events. 352/754 cut-off events. For 4472/4472 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4013 event pairs, 13 based on Foata normal form. 12/749 useless extension candidates. Maximal degree in co-relation 3887. Up to 203 conditions per place. [2024-01-27 16:02:15,754 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 88 selfloop transitions, 80 changer transitions 60/229 dead transitions. [2024-01-27 16:02:15,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 229 transitions, 2453 flow [2024-01-27 16:02:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 16:02:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 16:02:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 210 transitions. [2024-01-27 16:02:15,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-27 16:02:15,757 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1586 flow. Second operand 25 states and 210 transitions. [2024-01-27 16:02:15,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 229 transitions, 2453 flow [2024-01-27 16:02:15,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 229 transitions, 2103 flow, removed 81 selfloop flow, removed 22 redundant places. [2024-01-27 16:02:15,778 INFO L231 Difference]: Finished difference. Result has 148 places, 124 transitions, 1281 flow [2024-01-27 16:02:15,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1281, PETRI_PLACES=148, PETRI_TRANSITIONS=124} [2024-01-27 16:02:15,779 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2024-01-27 16:02:15,779 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 124 transitions, 1281 flow [2024-01-27 16:02:15,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:02:15,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:02:15,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:02:15,804 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 16:02:15,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:02:15,992 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 16:02:15,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:02:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash -456053115, now seen corresponding path program 5 times [2024-01-27 16:02:15,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:02:15,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563320004] [2024-01-27 16:02:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:02:15,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:02:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:02:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:02:16,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:02:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563320004] [2024-01-27 16:02:16,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563320004] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:02:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584339322] [2024-01-27 16:02:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:02:16,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:02:16,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:02:16,364 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 16:02:16,418 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 16:02:16,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:02:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:02:16,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 16:02:16,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:02:16,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:02:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:02:27,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:02:37,079 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 343 treesize of output 305 [2024-01-27 16:02:37,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:02:37,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 1461 treesize of output 923 [2024-01-27 16:03:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:03:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584339322] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:03:03,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:03:03,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2024-01-27 16:03:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362802147] [2024-01-27 16:03:03,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:03:03,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 16:03:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:03:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 16:03:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-01-27 16:03:03,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:03:03,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 124 transitions, 1281 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:03:03,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:03:03,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:03:03,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:04,172 WARN L293 SmtUtils]: Spent 49.41s on a formula simplification. DAG size of input: 111 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:52,175 WARN L293 SmtUtils]: Spent 43.17s on a formula simplification. DAG size of input: 100 DAG size of output: 96 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:55,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:18,269 WARN L293 SmtUtils]: Spent 18.31s on a formula simplification. DAG size of input: 130 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:05:19,087 INFO L124 PetriNetUnfolderBase]: 369/799 cut-off events. [2024-01-27 16:05:19,087 INFO L125 PetriNetUnfolderBase]: For 3950/3950 co-relation queries the response was YES. [2024-01-27 16:05:19,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 799 events. 369/799 cut-off events. For 3950/3950 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4339 event pairs, 19 based on Foata normal form. 12/794 useless extension candidates. Maximal degree in co-relation 4108. Up to 249 conditions per place. [2024-01-27 16:05:19,092 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 121 selfloop transitions, 102 changer transitions 21/245 dead transitions. [2024-01-27 16:05:19,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 245 transitions, 2433 flow [2024-01-27 16:05:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 16:05:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 16:05:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 292 transitions. [2024-01-27 16:05:19,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659147869674185 [2024-01-27 16:05:19,094 INFO L175 Difference]: Start difference. First operand has 148 places, 124 transitions, 1281 flow. Second operand 38 states and 292 transitions. [2024-01-27 16:05:19,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 245 transitions, 2433 flow [2024-01-27 16:05:19,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 245 transitions, 2154 flow, removed 74 selfloop flow, removed 22 redundant places. [2024-01-27 16:05:19,108 INFO L231 Difference]: Finished difference. Result has 148 places, 146 transitions, 1575 flow [2024-01-27 16:05:19,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1575, PETRI_PLACES=148, PETRI_TRANSITIONS=146} [2024-01-27 16:05:19,108 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2024-01-27 16:05:19,108 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 146 transitions, 1575 flow [2024-01-27 16:05:19,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:19,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:19,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:19,125 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 16:05:19,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 16:05:19,320 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 16:05:19,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash 452929413, now seen corresponding path program 6 times [2024-01-27 16:05:19,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:19,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108282673] [2024-01-27 16:05:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108282673] [2024-01-27 16:05:19,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108282673] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399469281] [2024-01-27 16:05:19,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:05:19,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:19,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:19,467 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 16:05:19,468 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 16:05:19,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 16:05:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:05:19,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 16:05:19,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:19,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:05:19,784 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 178 treesize of output 182 [2024-01-27 16:05:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:19,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:27,246 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-01-27 16:05:27,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 85 [2024-01-27 16:05:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:27,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399469281] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:27,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:27,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-01-27 16:05:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862504088] [2024-01-27 16:05:27,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:27,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:05:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:05:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:05:27,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:27,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 146 transitions, 1575 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:27,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:27,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:27,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:05:40,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:47,910 INFO L124 PetriNetUnfolderBase]: 444/965 cut-off events. [2024-01-27 16:05:47,910 INFO L125 PetriNetUnfolderBase]: For 4426/4426 co-relation queries the response was YES. [2024-01-27 16:05:47,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5047 conditions, 965 events. 444/965 cut-off events. For 4426/4426 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5626 event pairs, 10 based on Foata normal form. 5/969 useless extension candidates. Maximal degree in co-relation 5012. Up to 187 conditions per place. [2024-01-27 16:05:47,915 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 130 selfloop transitions, 119 changer transitions 15/265 dead transitions. [2024-01-27 16:05:47,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 265 transitions, 2917 flow [2024-01-27 16:05:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 16:05:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 16:05:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 207 transitions. [2024-01-27 16:05:47,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-01-27 16:05:47,918 INFO L175 Difference]: Start difference. First operand has 148 places, 146 transitions, 1575 flow. Second operand 21 states and 207 transitions. [2024-01-27 16:05:47,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 265 transitions, 2917 flow [2024-01-27 16:05:47,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 265 transitions, 2490 flow, removed 93 selfloop flow, removed 27 redundant places. [2024-01-27 16:05:47,934 INFO L231 Difference]: Finished difference. Result has 144 places, 180 transitions, 1991 flow [2024-01-27 16:05:47,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1991, PETRI_PLACES=144, PETRI_TRANSITIONS=180} [2024-01-27 16:05:47,935 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2024-01-27 16:05:47,935 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 180 transitions, 1991 flow [2024-01-27 16:05:47,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:47,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:47,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:47,949 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 16:05:48,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:48,148 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 16:05:48,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1986059347, now seen corresponding path program 1 times [2024-01-27 16:05:48,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:48,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577062214] [2024-01-27 16:05:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:48,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577062214] [2024-01-27 16:05:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577062214] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375315179] [2024-01-27 16:05:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:48,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:48,272 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 16:05:48,274 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 16:05:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:48,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 16:05:48,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:48,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:48,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375315179] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:48,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:48,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-27 16:05:48,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52294084] [2024-01-27 16:05:48,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:48,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 16:05:48,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 16:05:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 16:05:48,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:48,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 180 transitions, 1991 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:48,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:48,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:48,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:05:49,965 INFO L124 PetriNetUnfolderBase]: 456/982 cut-off events. [2024-01-27 16:05:49,965 INFO L125 PetriNetUnfolderBase]: For 5203/5203 co-relation queries the response was YES. [2024-01-27 16:05:49,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 982 events. 456/982 cut-off events. For 5203/5203 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5657 event pairs, 51 based on Foata normal form. 20/1002 useless extension candidates. Maximal degree in co-relation 5432. Up to 204 conditions per place. [2024-01-27 16:05:49,972 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 145 selfloop transitions, 102 changer transitions 0/248 dead transitions. [2024-01-27 16:05:49,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 248 transitions, 2958 flow [2024-01-27 16:05:49,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 16:05:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 16:05:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2024-01-27 16:05:49,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 16:05:49,985 INFO L175 Difference]: Start difference. First operand has 144 places, 180 transitions, 1991 flow. Second operand 16 states and 144 transitions. [2024-01-27 16:05:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 248 transitions, 2958 flow [2024-01-27 16:05:50,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 248 transitions, 2766 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-01-27 16:05:50,004 INFO L231 Difference]: Finished difference. Result has 152 places, 193 transitions, 2241 flow [2024-01-27 16:05:50,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2241, PETRI_PLACES=152, PETRI_TRANSITIONS=193} [2024-01-27 16:05:50,005 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2024-01-27 16:05:50,005 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 193 transitions, 2241 flow [2024-01-27 16:05:50,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:50,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:50,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:50,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 16:05:50,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:50,212 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 16:05:50,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1115883761, now seen corresponding path program 7 times [2024-01-27 16:05:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:50,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072547445] [2024-01-27 16:05:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:50,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:50,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072547445] [2024-01-27 16:05:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072547445] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341519678] [2024-01-27 16:05:50,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:05:50,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:50,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:50,408 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 16:05:50,409 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 16:05:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:50,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 16:05:50,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:50,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:05:50,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:05:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:05:50,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341519678] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:56,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 19 [2024-01-27 16:05:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942478491] [2024-01-27 16:05:56,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 16:05:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 16:05:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-01-27 16:05:56,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:56,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 193 transitions, 2241 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:56,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:56,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:56,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:07,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:22,667 WARN L293 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:06:34,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:41,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:46,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:46,070 INFO L124 PetriNetUnfolderBase]: 582/1202 cut-off events. [2024-01-27 16:06:46,070 INFO L125 PetriNetUnfolderBase]: For 6908/6908 co-relation queries the response was YES. [2024-01-27 16:06:46,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 1202 events. 582/1202 cut-off events. For 6908/6908 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7133 event pairs, 16 based on Foata normal form. 12/1213 useless extension candidates. Maximal degree in co-relation 6896. Up to 255 conditions per place. [2024-01-27 16:06:46,079 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 191 selfloop transitions, 162 changer transitions 12/366 dead transitions. [2024-01-27 16:06:46,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 366 transitions, 4067 flow [2024-01-27 16:06:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 16:06:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 16:06:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 322 transitions. [2024-01-27 16:06:46,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-01-27 16:06:46,081 INFO L175 Difference]: Start difference. First operand has 152 places, 193 transitions, 2241 flow. Second operand 34 states and 322 transitions. [2024-01-27 16:06:46,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 366 transitions, 4067 flow [2024-01-27 16:06:46,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 366 transitions, 3965 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-01-27 16:06:46,107 INFO L231 Difference]: Finished difference. Result has 192 places, 238 transitions, 3182 flow [2024-01-27 16:06:46,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3182, PETRI_PLACES=192, PETRI_TRANSITIONS=238} [2024-01-27 16:06:46,108 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2024-01-27 16:06:46,108 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 238 transitions, 3182 flow [2024-01-27 16:06:46,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:46,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:46,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:06:46,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 16:06:46,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 16:06:46,319 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 16:06:46,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash 315280563, now seen corresponding path program 2 times [2024-01-27 16:06:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766061773] [2024-01-27 16:06:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:06:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:46,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:06:46,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766061773] [2024-01-27 16:06:46,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766061773] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:06:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736685835] [2024-01-27 16:06:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:06:46,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:46,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:46,505 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 16:06:46,506 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 16:06:46,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:06:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:46,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:06:46,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:46,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:06:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:46,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736685835] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:06:46,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:06:46,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 16:06:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659787497] [2024-01-27 16:06:46,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:06:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 16:06:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:06:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 16:06:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-01-27 16:06:46,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:06:46,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 238 transitions, 3182 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:46,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:06:46,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:06:46,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:49,051 INFO L124 PetriNetUnfolderBase]: 682/1367 cut-off events. [2024-01-27 16:06:49,052 INFO L125 PetriNetUnfolderBase]: For 10673/10673 co-relation queries the response was YES. [2024-01-27 16:06:49,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8594 conditions, 1367 events. 682/1367 cut-off events. For 10673/10673 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8150 event pairs, 128 based on Foata normal form. 12/1378 useless extension candidates. Maximal degree in co-relation 8541. Up to 557 conditions per place. [2024-01-27 16:06:49,063 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 212 selfloop transitions, 128 changer transitions 0/341 dead transitions. [2024-01-27 16:06:49,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 341 transitions, 4786 flow [2024-01-27 16:06:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 16:06:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 16:06:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 164 transitions. [2024-01-27 16:06:49,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-01-27 16:06:49,065 INFO L175 Difference]: Start difference. First operand has 192 places, 238 transitions, 3182 flow. Second operand 16 states and 164 transitions. [2024-01-27 16:06:49,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 341 transitions, 4786 flow [2024-01-27 16:06:49,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 341 transitions, 4606 flow, removed 40 selfloop flow, removed 15 redundant places. [2024-01-27 16:06:49,107 INFO L231 Difference]: Finished difference. Result has 197 places, 282 transitions, 4066 flow [2024-01-27 16:06:49,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4066, PETRI_PLACES=197, PETRI_TRANSITIONS=282} [2024-01-27 16:06:49,107 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2024-01-27 16:06:49,107 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 282 transitions, 4066 flow [2024-01-27 16:06:49,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:49,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:49,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:06:49,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 16:06:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 16:06:49,320 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 16:06:49,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1245172017, now seen corresponding path program 3 times [2024-01-27 16:06:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:49,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613229987] [2024-01-27 16:06:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:06:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:49,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:06:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613229987] [2024-01-27 16:06:49,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613229987] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:06:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513480828] [2024-01-27 16:06:49,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:06:49,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:49,486 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 16:06:49,504 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 16:06:49,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 16:06:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:49,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:06:49,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:49,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:06:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:49,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513480828] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:06:49,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:06:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 16:06:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213673435] [2024-01-27 16:06:49,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:06:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 16:06:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:06:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 16:06:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 16:06:49,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:06:49,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 282 transitions, 4066 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:49,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:06:49,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:06:49,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:51,482 INFO L124 PetriNetUnfolderBase]: 670/1346 cut-off events. [2024-01-27 16:06:51,482 INFO L125 PetriNetUnfolderBase]: For 11636/11636 co-relation queries the response was YES. [2024-01-27 16:06:51,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1346 events. 670/1346 cut-off events. For 11636/11636 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8015 event pairs, 128 based on Foata normal form. 36/1381 useless extension candidates. Maximal degree in co-relation 8775. Up to 557 conditions per place. [2024-01-27 16:06:51,493 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 214 selfloop transitions, 130 changer transitions 0/345 dead transitions. [2024-01-27 16:06:51,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 345 transitions, 4968 flow [2024-01-27 16:06:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 16:06:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 16:06:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 185 transitions. [2024-01-27 16:06:51,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46365914786967416 [2024-01-27 16:06:51,494 INFO L175 Difference]: Start difference. First operand has 197 places, 282 transitions, 4066 flow. Second operand 19 states and 185 transitions. [2024-01-27 16:06:51,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 345 transitions, 4968 flow [2024-01-27 16:06:51,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 345 transitions, 4638 flow, removed 150 selfloop flow, removed 5 redundant places. [2024-01-27 16:06:51,557 INFO L231 Difference]: Finished difference. Result has 212 places, 284 transitions, 4093 flow [2024-01-27 16:06:51,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4093, PETRI_PLACES=212, PETRI_TRANSITIONS=284} [2024-01-27 16:06:51,558 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 190 predicate places. [2024-01-27 16:06:51,558 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 284 transitions, 4093 flow [2024-01-27 16:06:51,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:51,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:51,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:06:51,586 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 16:06:51,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 16:06:51,770 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 16:06:51,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash 853136141, now seen corresponding path program 4 times [2024-01-27 16:06:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582175243] [2024-01-27 16:06:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:06:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:06:51,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582175243] [2024-01-27 16:06:51,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582175243] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:06:51,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088993434] [2024-01-27 16:06:51,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:06:51,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:51,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:51,898 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 16:06:51,921 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 16:06:52,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:06:52,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:52,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:06:52,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:52,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:06:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:52,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088993434] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:06:52,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:06:52,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 16:06:52,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145304514] [2024-01-27 16:06:52,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:06:52,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 16:06:52,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:06:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 16:06:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-01-27 16:06:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:06:52,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 284 transitions, 4093 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:52,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:06:52,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:06:52,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:55,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:55,567 INFO L124 PetriNetUnfolderBase]: 882/1733 cut-off events. [2024-01-27 16:06:55,567 INFO L125 PetriNetUnfolderBase]: For 11966/11966 co-relation queries the response was YES. [2024-01-27 16:06:55,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 1733 events. 882/1733 cut-off events. For 11966/11966 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10657 event pairs, 119 based on Foata normal form. 8/1740 useless extension candidates. Maximal degree in co-relation 11055. Up to 726 conditions per place. [2024-01-27 16:06:55,580 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 200 selfloop transitions, 199 changer transitions 0/400 dead transitions. [2024-01-27 16:06:55,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 400 transitions, 6131 flow [2024-01-27 16:06:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 16:06:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 16:06:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-01-27 16:06:55,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-01-27 16:06:55,581 INFO L175 Difference]: Start difference. First operand has 212 places, 284 transitions, 4093 flow. Second operand 14 states and 142 transitions. [2024-01-27 16:06:55,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 400 transitions, 6131 flow [2024-01-27 16:06:55,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 400 transitions, 5952 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-01-27 16:06:55,632 INFO L231 Difference]: Finished difference. Result has 224 places, 344 transitions, 5468 flow [2024-01-27 16:06:55,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5468, PETRI_PLACES=224, PETRI_TRANSITIONS=344} [2024-01-27 16:06:55,633 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 202 predicate places. [2024-01-27 16:06:55,633 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 344 transitions, 5468 flow [2024-01-27 16:06:55,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:55,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:55,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:06:55,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 16:06:55,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 16:06:55,845 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 16:06:55,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash -707316439, now seen corresponding path program 5 times [2024-01-27 16:06:55,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:55,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474713246] [2024-01-27 16:06:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:55,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:06:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:56,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:06:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474713246] [2024-01-27 16:06:56,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474713246] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:06:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56354556] [2024-01-27 16:06:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:06:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:56,018 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 16:06:56,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 16:06:56,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:06:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:56,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:06:56,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:56,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:06:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56354556] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:06:56,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:06:56,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 16:06:56,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295206544] [2024-01-27 16:06:56,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:06:56,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 16:06:56,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:06:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 16:06:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 16:06:56,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:06:56,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 344 transitions, 5468 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:56,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:06:56,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:06:56,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:58,660 INFO L124 PetriNetUnfolderBase]: 844/1653 cut-off events. [2024-01-27 16:06:58,660 INFO L125 PetriNetUnfolderBase]: For 15015/15015 co-relation queries the response was YES. [2024-01-27 16:06:58,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11383 conditions, 1653 events. 844/1653 cut-off events. For 15015/15015 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 10002 event pairs, 119 based on Foata normal form. 44/1696 useless extension candidates. Maximal degree in co-relation 11321. Up to 726 conditions per place. [2024-01-27 16:06:58,673 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 197 selfloop transitions, 194 changer transitions 0/392 dead transitions. [2024-01-27 16:06:58,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 392 transitions, 6453 flow [2024-01-27 16:06:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 16:06:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 16:06:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 155 transitions. [2024-01-27 16:06:58,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2024-01-27 16:06:58,685 INFO L175 Difference]: Start difference. First operand has 224 places, 344 transitions, 5468 flow. Second operand 17 states and 155 transitions. [2024-01-27 16:06:58,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 392 transitions, 6453 flow [2024-01-27 16:06:58,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 392 transitions, 6098 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-01-27 16:06:58,759 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 5528 flow [2024-01-27 16:06:58,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5528, PETRI_PLACES=234, PETRI_TRANSITIONS=343} [2024-01-27 16:06:58,760 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 212 predicate places. [2024-01-27 16:06:58,760 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 5528 flow [2024-01-27 16:06:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:58,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:58,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:06:58,772 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 16:06:58,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:58,972 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 16:06:58,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash -592059345, now seen corresponding path program 6 times [2024-01-27 16:06:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:58,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662487767] [2024-01-27 16:06:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:06:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:06:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662487767] [2024-01-27 16:06:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662487767] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:06:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512624602] [2024-01-27 16:06:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:06:59,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:59,160 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 16:06:59,211 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 16:06:59,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 16:06:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:59,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:06:59,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:59,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:07:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512624602] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:00,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:07:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 16:07:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408259179] [2024-01-27 16:07:00,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:00,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 16:07:00,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 16:07:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 16:07:00,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:07:00,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 343 transitions, 5528 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:00,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:00,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:07:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:00,919 INFO L124 PetriNetUnfolderBase]: 1031/2032 cut-off events. [2024-01-27 16:07:00,919 INFO L125 PetriNetUnfolderBase]: For 18549/18549 co-relation queries the response was YES. [2024-01-27 16:07:00,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14037 conditions, 2032 events. 1031/2032 cut-off events. For 18549/18549 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13004 event pairs, 44 based on Foata normal form. 6/2037 useless extension candidates. Maximal degree in co-relation 13975. Up to 566 conditions per place. [2024-01-27 16:07:00,937 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 212 selfloop transitions, 258 changer transitions 0/471 dead transitions. [2024-01-27 16:07:00,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 471 transitions, 8125 flow [2024-01-27 16:07:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 16:07:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 16:07:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2024-01-27 16:07:00,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 16:07:00,939 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 5528 flow. Second operand 15 states and 150 transitions. [2024-01-27 16:07:00,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 471 transitions, 8125 flow [2024-01-27 16:07:01,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 471 transitions, 7815 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-01-27 16:07:01,044 INFO L231 Difference]: Finished difference. Result has 244 places, 403 transitions, 6976 flow [2024-01-27 16:07:01,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6976, PETRI_PLACES=244, PETRI_TRANSITIONS=403} [2024-01-27 16:07:01,045 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 222 predicate places. [2024-01-27 16:07:01,045 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 403 transitions, 6976 flow [2024-01-27 16:07:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:01,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:01,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:01,068 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 16:07:01,258 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,SelfDestructingSolverStorable19 [2024-01-27 16:07:01,258 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 16:07:01,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1278771245, now seen corresponding path program 7 times [2024-01-27 16:07:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:01,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193501832] [2024-01-27 16:07:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:01,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193501832] [2024-01-27 16:07:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193501832] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:07:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269752233] [2024-01-27 16:07:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:07:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:01,387 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 16:07:01,387 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 16:07:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:01,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:07:01,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:07:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:01,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:07:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:01,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269752233] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:01,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:07:01,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 16:07:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339829521] [2024-01-27 16:07:01,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:01,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 16:07:01,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 16:07:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-01-27 16:07:01,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:07:01,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 403 transitions, 6976 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:01,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:01,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:07:01,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:02,957 INFO L124 PetriNetUnfolderBase]: 1122/2239 cut-off events. [2024-01-27 16:07:02,957 INFO L125 PetriNetUnfolderBase]: For 26538/26538 co-relation queries the response was YES. [2024-01-27 16:07:02,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16201 conditions, 2239 events. 1122/2239 cut-off events. For 26538/26538 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14649 event pairs, 82 based on Foata normal form. 24/2262 useless extension candidates. Maximal degree in co-relation 16133. Up to 594 conditions per place. [2024-01-27 16:07:02,985 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 233 selfloop transitions, 288 changer transitions 0/522 dead transitions. [2024-01-27 16:07:02,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 522 transitions, 9370 flow [2024-01-27 16:07:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 16:07:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 16:07:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 188 transitions. [2024-01-27 16:07:02,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-01-27 16:07:02,986 INFO L175 Difference]: Start difference. First operand has 244 places, 403 transitions, 6976 flow. Second operand 20 states and 188 transitions. [2024-01-27 16:07:02,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 522 transitions, 9370 flow [2024-01-27 16:07:03,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 522 transitions, 8940 flow, removed 151 selfloop flow, removed 4 redundant places. [2024-01-27 16:07:03,120 INFO L231 Difference]: Finished difference. Result has 267 places, 440 transitions, 8096 flow [2024-01-27 16:07:03,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8096, PETRI_PLACES=267, PETRI_TRANSITIONS=440} [2024-01-27 16:07:03,121 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 245 predicate places. [2024-01-27 16:07:03,121 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 440 transitions, 8096 flow [2024-01-27 16:07:03,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:03,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:03,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:03,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 16:07:03,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:03,333 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 16:07:03,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:03,334 INFO L85 PathProgramCache]: Analyzing trace with hash 281681335, now seen corresponding path program 8 times [2024-01-27 16:07:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:03,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103410282] [2024-01-27 16:07:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:03,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103410282] [2024-01-27 16:07:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103410282] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:07:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719611853] [2024-01-27 16:07:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:07:03,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:03,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:03,535 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 16:07:03,537 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 16:07:03,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:07:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:07:03,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 16:07:03,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:07:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:03,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:07:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719611853] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:03,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:07:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-27 16:07:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727933071] [2024-01-27 16:07:03,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:03,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 16:07:03,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 16:07:03,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-27 16:07:03,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:07:03,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 440 transitions, 8096 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:03,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:07:03,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:04,848 INFO L124 PetriNetUnfolderBase]: 1119/2215 cut-off events. [2024-01-27 16:07:04,849 INFO L125 PetriNetUnfolderBase]: For 29893/29893 co-relation queries the response was YES. [2024-01-27 16:07:04,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16862 conditions, 2215 events. 1119/2215 cut-off events. For 29893/29893 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14306 event pairs, 82 based on Foata normal form. 6/2220 useless extension candidates. Maximal degree in co-relation 16787. Up to 594 conditions per place. [2024-01-27 16:07:04,867 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 217 selfloop transitions, 279 changer transitions 0/497 dead transitions. [2024-01-27 16:07:04,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 497 transitions, 9565 flow [2024-01-27 16:07:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 16:07:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 16:07:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-01-27 16:07:04,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-01-27 16:07:04,885 INFO L175 Difference]: Start difference. First operand has 267 places, 440 transitions, 8096 flow. Second operand 14 states and 142 transitions. [2024-01-27 16:07:04,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 497 transitions, 9565 flow [2024-01-27 16:07:05,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 497 transitions, 9324 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-01-27 16:07:05,025 INFO L231 Difference]: Finished difference. Result has 274 places, 438 transitions, 8358 flow [2024-01-27 16:07:05,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7778, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8358, PETRI_PLACES=274, PETRI_TRANSITIONS=438} [2024-01-27 16:07:05,025 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 252 predicate places. [2024-01-27 16:07:05,026 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 438 transitions, 8358 flow [2024-01-27 16:07:05,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:05,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:05,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:05,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 16:07:05,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:05,237 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 16:07:05,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:05,238 INFO L85 PathProgramCache]: Analyzing trace with hash -235431668, now seen corresponding path program 8 times [2024-01-27 16:07:05,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:05,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171667061] [2024-01-27 16:07:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:05,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:07:05,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:05,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171667061] [2024-01-27 16:07:05,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171667061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:07:05,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006148167] [2024-01-27 16:07:05,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:07:05,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:05,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:05,702 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 16:07:05,724 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 16:07:05,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:07:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:07:05,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 16:07:05,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:07:05,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:07:20,855 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:07:45,070 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:07:53,087 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:08:01,099 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:08:09,110 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:08:17,124 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:09:38,664 WARN L293 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:09:38,704 INFO L173 IndexEqualityManager]: detected equality via solver [2024-01-27 16:09:38,705 INFO L173 IndexEqualityManager]: detected equality via solver [2024-01-27 16:09:38,786 INFO L349 Elim1Store]: treesize reduction 129, result has 24.1 percent of original size [2024-01-27 16:09:38,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 125 [2024-01-27 16:09:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:39,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:10:28,874 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:10:36,890 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:10:44,902 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:10:52,917 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:00,930 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:08,944 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:16,958 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:24,973 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:32,986 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:41,001 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:49,081 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15