./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.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 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:39:01,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:39:01,163 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:39:01,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:39:01,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:39:01,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:39:01,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:39:01,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:39:01,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:39:01,198 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:39:01,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:39:01,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:39:01,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:39:01,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:39:01,200 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:39:01,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:39:01,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:39:01,201 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:39:01,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:39:01,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:39:01,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:39:01,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:39:01,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:39:01,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:39:01,202 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:39:01,203 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:39:01,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:39:01,203 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:39:01,204 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:39:01,204 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:39:01,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:39:01,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:39:01,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:39:01,205 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:39:01,205 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:39:01,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:39:01,206 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:39:01,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:39:01,206 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:39:01,206 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:39:01,206 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:39:01,207 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:39:01,207 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:39:01,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2024-01-27 15:39:01,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:39:01,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:39:01,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:39:01,434 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:39:01,434 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:39:01,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-01-27 15:39:02,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:39:02,634 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:39:02,635 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-01-27 15:39:02,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7cf7694/f7f78b0b9e474a1691350be8321196a0/FLAGa7b8df107 [2024-01-27 15:39:02,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7cf7694/f7f78b0b9e474a1691350be8321196a0 [2024-01-27 15:39:02,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:39:02,652 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:39:02,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:39:02,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:39:02,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:39:02,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a73d199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02, skipping insertion in model container [2024-01-27 15:39:02,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,677 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:39:02,802 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[2017,2030] [2024-01-27 15:39:02,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:39:02,811 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:39:02,824 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[2017,2030] [2024-01-27 15:39:02,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:39:02,834 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:39:02,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02 WrapperNode [2024-01-27 15:39:02,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:39:02,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:39:02,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:39:02,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:39:02,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,860 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2024-01-27 15:39:02,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:39:02,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:39:02,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:39:02,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:39:02,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,870 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,879 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:39:02,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,883 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:39:02,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:39:02,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:39:02,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:39:02,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (1/1) ... [2024-01-27 15:39:02,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:39:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:02,911 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 15:39:02,928 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 15:39:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:39:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:39:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:39:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:39:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:39:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:39:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:39:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:39:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:39:02,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:39:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:39:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:39:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:39:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:39:02,961 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 15:39:03,047 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:39:03,049 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:39:03,179 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:39:03,179 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:39:03,256 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:39:03,256 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:39:03,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:39:03 BoogieIcfgContainer [2024-01-27 15:39:03,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:39:03,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:39:03,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:39:03,261 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:39:03,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:39:02" (1/3) ... [2024-01-27 15:39:03,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4faac938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:39:03, skipping insertion in model container [2024-01-27 15:39:03,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:39:02" (2/3) ... [2024-01-27 15:39:03,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4faac938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:39:03, skipping insertion in model container [2024-01-27 15:39:03,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:39:03" (3/3) ... [2024-01-27 15:39:03,263 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-01-27 15:39:03,270 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:39:03,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:39:03,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:39:03,278 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:39:03,310 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:39:03,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-01-27 15:39:03,357 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-01-27 15:39:03,357 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:39:03,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-27 15:39:03,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-01-27 15:39:03,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-01-27 15:39:03,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:39:03,375 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;@4b877f6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:39:03,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:39:03,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:39:03,382 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-27 15:39:03,382 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:39:03,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:03,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:03,383 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 15:39:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -760149179, now seen corresponding path program 1 times [2024-01-27 15:39:03,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:03,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477930728] [2024-01-27 15:39:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:03,658 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 15:39:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:03,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477930728] [2024-01-27 15:39:03,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477930728] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:39:03,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:39:03,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:39:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839331952] [2024-01-27 15:39:03,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:39:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:39:03,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:39:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:39:03,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:39:03,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:03,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:03,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:39:03,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:03,751 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2024-01-27 15:39:03,751 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-01-27 15:39:03,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 168 events. 82/168 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 30 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 271. Up to 99 conditions per place. [2024-01-27 15:39:03,754 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2024-01-27 15:39:03,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 135 flow [2024-01-27 15:39:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:39:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:39:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-01-27 15:39:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-01-27 15:39:03,786 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 44 transitions. [2024-01-27 15:39:03,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 135 flow [2024-01-27 15:39:03,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:39:03,794 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 58 flow [2024-01-27 15:39:03,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-01-27 15:39:03,801 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-01-27 15:39:03,802 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 58 flow [2024-01-27 15:39:03,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:03,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:03,803 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 15:39:03,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:39:03,804 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 15:39:03,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash -985292509, now seen corresponding path program 1 times [2024-01-27 15:39:03,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:03,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080384190] [2024-01-27 15:39:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:04,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080384190] [2024-01-27 15:39:04,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080384190] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:39:04,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:39:04,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:39:04,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270046922] [2024-01-27 15:39:04,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:39:04,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:39:04,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:39:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:39:04,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-27 15:39:04,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:04,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-27 15:39:04,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:04,165 INFO L124 PetriNetUnfolderBase]: 138/262 cut-off events. [2024-01-27 15:39:04,166 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-27 15:39:04,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 262 events. 138/262 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 999 event pairs, 59 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 193. Up to 174 conditions per place. [2024-01-27 15:39:04,168 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 7 changer transitions 3/43 dead transitions. [2024-01-27 15:39:04,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 195 flow [2024-01-27 15:39:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:39:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:39:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-01-27 15:39:04,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-01-27 15:39:04,171 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 58 flow. Second operand 5 states and 62 transitions. [2024-01-27 15:39:04,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 195 flow [2024-01-27 15:39:04,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:39:04,174 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 108 flow [2024-01-27 15:39:04,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-01-27 15:39:04,175 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-01-27 15:39:04,176 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 108 flow [2024-01-27 15:39:04,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:04,177 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 15:39:04,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:39:04,179 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 15:39:04,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash -692240137, now seen corresponding path program 2 times [2024-01-27 15:39:04,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:04,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759422479] [2024-01-27 15:39:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759422479] [2024-01-27 15:39:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759422479] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:39:04,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:39:04,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:39:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124353734] [2024-01-27 15:39:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:39:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:39:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:39:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:39:04,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-27 15:39:04,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:04,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-27 15:39:04,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:04,411 INFO L124 PetriNetUnfolderBase]: 156/300 cut-off events. [2024-01-27 15:39:04,411 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2024-01-27 15:39:04,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 300 events. 156/300 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1186 event pairs, 4 based on Foata normal form. 14/314 useless extension candidates. Maximal degree in co-relation 357. Up to 130 conditions per place. [2024-01-27 15:39:04,414 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 46 selfloop transitions, 10 changer transitions 1/59 dead transitions. [2024-01-27 15:39:04,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 339 flow [2024-01-27 15:39:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:39:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:39:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-01-27 15:39:04,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093167701863354 [2024-01-27 15:39:04,415 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 108 flow. Second operand 7 states and 82 transitions. [2024-01-27 15:39:04,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 339 flow [2024-01-27 15:39:04,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-27 15:39:04,418 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 188 flow [2024-01-27 15:39:04,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-01-27 15:39:04,419 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-01-27 15:39:04,419 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 188 flow [2024-01-27 15:39:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:04,419 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 15:39:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:39:04,420 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 15:39:04,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2010766619, now seen corresponding path program 3 times [2024-01-27 15:39:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:04,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235090128] [2024-01-27 15:39:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:04,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235090128] [2024-01-27 15:39:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235090128] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:39:04,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:39:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:39:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005012780] [2024-01-27 15:39:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:39:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:39:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:39:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:39:04,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-27 15:39:04,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:04,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-27 15:39:04,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:04,571 INFO L124 PetriNetUnfolderBase]: 206/393 cut-off events. [2024-01-27 15:39:04,572 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2024-01-27 15:39:04,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 393 events. 206/393 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1620 event pairs, 66 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 889. Up to 176 conditions per place. [2024-01-27 15:39:04,575 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 47 selfloop transitions, 10 changer transitions 2/61 dead transitions. [2024-01-27 15:39:04,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 445 flow [2024-01-27 15:39:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:39:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:39:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-01-27 15:39:04,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-01-27 15:39:04,576 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 188 flow. Second operand 5 states and 61 transitions. [2024-01-27 15:39:04,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 445 flow [2024-01-27 15:39:04,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:39:04,580 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 239 flow [2024-01-27 15:39:04,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-01-27 15:39:04,581 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2024-01-27 15:39:04,581 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 239 flow [2024-01-27 15:39:04,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:04,582 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 15:39:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:39:04,582 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 15:39:04,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash -39175267, now seen corresponding path program 4 times [2024-01-27 15:39:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:04,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369101599] [2024-01-27 15:39:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:04,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369101599] [2024-01-27 15:39:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369101599] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:04,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459799139] [2024-01-27 15:39:04,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:39:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:04,643 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 15:39:04,660 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 15:39:04,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:39:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:04,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:39:04,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:04,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:04,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459799139] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:04,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:04,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-01-27 15:39:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077576578] [2024-01-27 15:39:04,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:04,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:39:04,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:39:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:39:04,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:04,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 239 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 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 15:39:04,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:04,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:05,071 INFO L124 PetriNetUnfolderBase]: 383/674 cut-off events. [2024-01-27 15:39:05,071 INFO L125 PetriNetUnfolderBase]: For 1507/1507 co-relation queries the response was YES. [2024-01-27 15:39:05,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 674 events. 383/674 cut-off events. For 1507/1507 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2846 event pairs, 30 based on Foata normal form. 14/688 useless extension candidates. Maximal degree in co-relation 2102. Up to 155 conditions per place. [2024-01-27 15:39:05,075 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 77 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2024-01-27 15:39:05,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 119 transitions, 900 flow [2024-01-27 15:39:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:39:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:39:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2024-01-27 15:39:05,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-01-27 15:39:05,082 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 239 flow. Second operand 15 states and 153 transitions. [2024-01-27 15:39:05,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 119 transitions, 900 flow [2024-01-27 15:39:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 119 transitions, 862 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-01-27 15:39:05,087 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 558 flow [2024-01-27 15:39:05,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=558, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-01-27 15:39:05,087 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2024-01-27 15:39:05,087 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 558 flow [2024-01-27 15:39:05,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 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 15:39:05,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:05,088 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 15:39:05,102 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 15:39:05,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:05,289 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 15:39:05,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1995949459, now seen corresponding path program 5 times [2024-01-27 15:39:05,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:05,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913704934] [2024-01-27 15:39:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:05,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913704934] [2024-01-27 15:39:05,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913704934] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652921681] [2024-01-27 15:39:05,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:39:05,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:05,389 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 15:39:05,403 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 15:39:05,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:39:05,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:05,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:39:05,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:05,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652921681] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:05,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-01-27 15:39:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534964165] [2024-01-27 15:39:05,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:39:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:39:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:39:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:05,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 558 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:05,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:05,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:05,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:05,703 INFO L124 PetriNetUnfolderBase]: 368/657 cut-off events. [2024-01-27 15:39:05,703 INFO L125 PetriNetUnfolderBase]: For 3036/3036 co-relation queries the response was YES. [2024-01-27 15:39:05,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 657 events. 368/657 cut-off events. For 3036/3036 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2838 event pairs, 63 based on Foata normal form. 14/671 useless extension candidates. Maximal degree in co-relation 2469. Up to 243 conditions per place. [2024-01-27 15:39:05,708 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 69 selfloop transitions, 37 changer transitions 1/108 dead transitions. [2024-01-27 15:39:05,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 1057 flow [2024-01-27 15:39:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:39:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:39:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-01-27 15:39:05,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2024-01-27 15:39:05,709 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 558 flow. Second operand 8 states and 93 transitions. [2024-01-27 15:39:05,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 1057 flow [2024-01-27 15:39:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 918 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-01-27 15:39:05,716 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 680 flow [2024-01-27 15:39:05,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=680, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-01-27 15:39:05,717 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-01-27 15:39:05,717 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 680 flow [2024-01-27 15:39:05,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:05,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:05,717 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 15:39:05,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:39:05,928 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 15:39:05,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 328929709, now seen corresponding path program 6 times [2024-01-27 15:39:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76807766] [2024-01-27 15:39:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:05,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:05,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76807766] [2024-01-27 15:39:05,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76807766] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:39:05,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:39:05,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:39:05,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668616274] [2024-01-27 15:39:05,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:39:05,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:39:05,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:05,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:39:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:39:05,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-27 15:39:05,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 680 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:05,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:05,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-27 15:39:05,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:06,084 INFO L124 PetriNetUnfolderBase]: 297/551 cut-off events. [2024-01-27 15:39:06,084 INFO L125 PetriNetUnfolderBase]: For 2740/2746 co-relation queries the response was YES. [2024-01-27 15:39:06,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 551 events. 297/551 cut-off events. For 2740/2746 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2387 event pairs, 80 based on Foata normal form. 2/544 useless extension candidates. Maximal degree in co-relation 2177. Up to 284 conditions per place. [2024-01-27 15:39:06,088 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 50 selfloop transitions, 22 changer transitions 2/86 dead transitions. [2024-01-27 15:39:06,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 891 flow [2024-01-27 15:39:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:39:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:39:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-01-27 15:39:06,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956521739130435 [2024-01-27 15:39:06,089 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 680 flow. Second operand 5 states and 57 transitions. [2024-01-27 15:39:06,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 891 flow [2024-01-27 15:39:06,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 822 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-01-27 15:39:06,096 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 649 flow [2024-01-27 15:39:06,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-01-27 15:39:06,098 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-01-27 15:39:06,098 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 649 flow [2024-01-27 15:39:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:06,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:06,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:06,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:39:06,098 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 15:39:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1322100768, now seen corresponding path program 1 times [2024-01-27 15:39:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038532011] [2024-01-27 15:39:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:06,149 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 15:39:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:06,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038532011] [2024-01-27 15:39:06,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038532011] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:06,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108199979] [2024-01-27 15:39:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:06,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:06,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:06,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:39:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:06,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:06,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:06,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:06,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108199979] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:06,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:06,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 5 [2024-01-27 15:39:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242129657] [2024-01-27 15:39:06,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:39:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:39:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:39:06,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:39:06,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 649 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:06,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:06,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:39:06,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:06,379 INFO L124 PetriNetUnfolderBase]: 479/941 cut-off events. [2024-01-27 15:39:06,380 INFO L125 PetriNetUnfolderBase]: For 4472/4485 co-relation queries the response was YES. [2024-01-27 15:39:06,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 941 events. 479/941 cut-off events. For 4472/4485 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4870 event pairs, 76 based on Foata normal form. 19/955 useless extension candidates. Maximal degree in co-relation 2874. Up to 367 conditions per place. [2024-01-27 15:39:06,386 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 94 selfloop transitions, 5 changer transitions 16/133 dead transitions. [2024-01-27 15:39:06,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 133 transitions, 1419 flow [2024-01-27 15:39:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:39:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:39:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-27 15:39:06,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-01-27 15:39:06,387 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 649 flow. Second operand 4 states and 65 transitions. [2024-01-27 15:39:06,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 133 transitions, 1419 flow [2024-01-27 15:39:06,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 1327 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-27 15:39:06,396 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 634 flow [2024-01-27 15:39:06,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=634, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-01-27 15:39:06,397 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 48 predicate places. [2024-01-27 15:39:06,397 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 634 flow [2024-01-27 15:39:06,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:06,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:06,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:06,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:06,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:06,608 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 15:39:06,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash 596779484, now seen corresponding path program 2 times [2024-01-27 15:39:06,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:06,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761041287] [2024-01-27 15:39:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:06,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761041287] [2024-01-27 15:39:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761041287] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342045701] [2024-01-27 15:39:06,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:39:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:06,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:06,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:39:06,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:39:06,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:06,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:06,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:06,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:39:06,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342045701] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:06,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:06,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-27 15:39:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453382553] [2024-01-27 15:39:06,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:39:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:39:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:39:06,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:06,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 634 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:06,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:06,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:06,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:07,098 INFO L124 PetriNetUnfolderBase]: 1136/1892 cut-off events. [2024-01-27 15:39:07,099 INFO L125 PetriNetUnfolderBase]: For 7026/7026 co-relation queries the response was YES. [2024-01-27 15:39:07,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 1892 events. 1136/1892 cut-off events. For 7026/7026 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8888 event pairs, 138 based on Foata normal form. 12/1886 useless extension candidates. Maximal degree in co-relation 6376. Up to 509 conditions per place. [2024-01-27 15:39:07,130 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 133 selfloop transitions, 55 changer transitions 3/192 dead transitions. [2024-01-27 15:39:07,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 192 transitions, 1815 flow [2024-01-27 15:39:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:39:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:39:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-01-27 15:39:07,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48757763975155277 [2024-01-27 15:39:07,131 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 634 flow. Second operand 14 states and 157 transitions. [2024-01-27 15:39:07,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 192 transitions, 1815 flow [2024-01-27 15:39:07,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 192 transitions, 1775 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-01-27 15:39:07,141 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 1021 flow [2024-01-27 15:39:07,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1021, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-01-27 15:39:07,141 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2024-01-27 15:39:07,142 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 1021 flow [2024-01-27 15:39:07,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:07,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:07,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:07,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:07,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:07,353 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:07,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1383073420, now seen corresponding path program 3 times [2024-01-27 15:39:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:07,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196412057] [2024-01-27 15:39:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196412057] [2024-01-27 15:39:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196412057] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568450549] [2024-01-27 15:39:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:39:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:07,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:07,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:39:07,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:39:07,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:07,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:07,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:07,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568450549] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:07,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-27 15:39:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609766078] [2024-01-27 15:39:07,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:39:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:39:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:39:07,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:07,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 1021 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:07,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:07,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:07,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:07,929 INFO L124 PetriNetUnfolderBase]: 1405/2346 cut-off events. [2024-01-27 15:39:07,930 INFO L125 PetriNetUnfolderBase]: For 12983/12983 co-relation queries the response was YES. [2024-01-27 15:39:07,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11473 conditions, 2346 events. 1405/2346 cut-off events. For 12983/12983 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11602 event pairs, 71 based on Foata normal form. 38/2384 useless extension candidates. Maximal degree in co-relation 9134. Up to 614 conditions per place. [2024-01-27 15:39:07,944 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 101 selfloop transitions, 98 changer transitions 29/229 dead transitions. [2024-01-27 15:39:07,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 229 transitions, 2421 flow [2024-01-27 15:39:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:39:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:39:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2024-01-27 15:39:07,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-01-27 15:39:07,946 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 1021 flow. Second operand 15 states and 153 transitions. [2024-01-27 15:39:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 229 transitions, 2421 flow [2024-01-27 15:39:07,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 2299 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-01-27 15:39:07,968 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1659 flow [2024-01-27 15:39:07,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1659, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2024-01-27 15:39:07,968 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2024-01-27 15:39:07,969 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1659 flow [2024-01-27 15:39:07,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:07,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:07,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:07,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:08,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:39:08,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:08,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -803626312, now seen corresponding path program 4 times [2024-01-27 15:39:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:08,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664181683] [2024-01-27 15:39:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:08,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:08,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664181683] [2024-01-27 15:39:08,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664181683] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:08,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164654760] [2024-01-27 15:39:08,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:39:08,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:08,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:08,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:39:08,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:39:08,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:08,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:08,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:08,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164654760] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:08,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:39:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186088082] [2024-01-27 15:39:08,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:39:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:08,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:39:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:39:08,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:08,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1659 flow. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:08,903 INFO L124 PetriNetUnfolderBase]: 1757/2921 cut-off events. [2024-01-27 15:39:08,904 INFO L125 PetriNetUnfolderBase]: For 25153/25153 co-relation queries the response was YES. [2024-01-27 15:39:08,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15958 conditions, 2921 events. 1757/2921 cut-off events. For 25153/25153 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15051 event pairs, 140 based on Foata normal form. 18/2939 useless extension candidates. Maximal degree in co-relation 15267. Up to 581 conditions per place. [2024-01-27 15:39:08,922 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 152 selfloop transitions, 107 changer transitions 3/263 dead transitions. [2024-01-27 15:39:08,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 263 transitions, 3258 flow [2024-01-27 15:39:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:39:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:39:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 170 transitions. [2024-01-27 15:39:08,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-01-27 15:39:08,923 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1659 flow. Second operand 17 states and 170 transitions. [2024-01-27 15:39:08,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 263 transitions, 3258 flow [2024-01-27 15:39:08,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 263 transitions, 3094 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-01-27 15:39:08,965 INFO L231 Difference]: Finished difference. Result has 130 places, 178 transitions, 2253 flow [2024-01-27 15:39:08,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2253, PETRI_PLACES=130, PETRI_TRANSITIONS=178} [2024-01-27 15:39:08,966 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2024-01-27 15:39:08,966 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 178 transitions, 2253 flow [2024-01-27 15:39:08,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:08,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:08,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:08,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:09,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:09,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1985844006, now seen corresponding path program 5 times [2024-01-27 15:39:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745224521] [2024-01-27 15:39:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:09,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745224521] [2024-01-27 15:39:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745224521] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757690064] [2024-01-27 15:39:09,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:39:09,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:09,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:09,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:39:09,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:39:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:09,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:09,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:09,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:09,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757690064] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:09,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:09,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:39:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128696936] [2024-01-27 15:39:09,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:39:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:39:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:39:09,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:09,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 178 transitions, 2253 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:09,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:09,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:09,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:10,100 INFO L124 PetriNetUnfolderBase]: 2272/3766 cut-off events. [2024-01-27 15:39:10,101 INFO L125 PetriNetUnfolderBase]: For 40800/40800 co-relation queries the response was YES. [2024-01-27 15:39:10,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22125 conditions, 3766 events. 2272/3766 cut-off events. For 40800/40800 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20425 event pairs, 76 based on Foata normal form. 94/3860 useless extension candidates. Maximal degree in co-relation 21235. Up to 1175 conditions per place. [2024-01-27 15:39:10,130 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 145 selfloop transitions, 169 changer transitions 2/317 dead transitions. [2024-01-27 15:39:10,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 317 transitions, 4161 flow [2024-01-27 15:39:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:39:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:39:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2024-01-27 15:39:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592391304347826 [2024-01-27 15:39:10,131 INFO L175 Difference]: Start difference. First operand has 130 places, 178 transitions, 2253 flow. Second operand 16 states and 169 transitions. [2024-01-27 15:39:10,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 317 transitions, 4161 flow [2024-01-27 15:39:10,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 317 transitions, 3865 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-01-27 15:39:10,219 INFO L231 Difference]: Finished difference. Result has 153 places, 231 transitions, 3376 flow [2024-01-27 15:39:10,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3376, PETRI_PLACES=153, PETRI_TRANSITIONS=231} [2024-01-27 15:39:10,221 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2024-01-27 15:39:10,221 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 231 transitions, 3376 flow [2024-01-27 15:39:10,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:10,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:10,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:10,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:10,434 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:10,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash -974719262, now seen corresponding path program 6 times [2024-01-27 15:39:10,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:10,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868913326] [2024-01-27 15:39:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:10,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868913326] [2024-01-27 15:39:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868913326] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:10,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925827698] [2024-01-27 15:39:10,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:39:10,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:10,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:10,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:39:10,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:39:10,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:10,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:10,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:10,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925827698] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:10,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:10,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-27 15:39:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810621245] [2024-01-27 15:39:10,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:10,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:39:10,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:39:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:39:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 231 transitions, 3376 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:10,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:11,671 INFO L124 PetriNetUnfolderBase]: 2630/4352 cut-off events. [2024-01-27 15:39:11,672 INFO L125 PetriNetUnfolderBase]: For 61926/61926 co-relation queries the response was YES. [2024-01-27 15:39:11,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27300 conditions, 4352 events. 2630/4352 cut-off events. For 61926/61926 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 24231 event pairs, 87 based on Foata normal form. 94/4446 useless extension candidates. Maximal degree in co-relation 26659. Up to 759 conditions per place. [2024-01-27 15:39:11,701 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 175 selfloop transitions, 219 changer transitions 3/398 dead transitions. [2024-01-27 15:39:11,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 398 transitions, 5689 flow [2024-01-27 15:39:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:39:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:39:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 258 transitions. [2024-01-27 15:39:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431438127090301 [2024-01-27 15:39:11,705 INFO L175 Difference]: Start difference. First operand has 153 places, 231 transitions, 3376 flow. Second operand 26 states and 258 transitions. [2024-01-27 15:39:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 398 transitions, 5689 flow [2024-01-27 15:39:11,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 398 transitions, 5608 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-01-27 15:39:11,886 INFO L231 Difference]: Finished difference. Result has 189 places, 276 transitions, 4781 flow [2024-01-27 15:39:11,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4781, PETRI_PLACES=189, PETRI_TRANSITIONS=276} [2024-01-27 15:39:11,888 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2024-01-27 15:39:11,888 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 276 transitions, 4781 flow [2024-01-27 15:39:11,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:11,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:11,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:11,899 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 15:39:12,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:39:12,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:12,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:12,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1987411794, now seen corresponding path program 7 times [2024-01-27 15:39:12,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:12,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689521266] [2024-01-27 15:39:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:12,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689521266] [2024-01-27 15:39:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689521266] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211287590] [2024-01-27 15:39:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:39:12,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:12,189 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:12,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:39:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:12,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:12,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:12,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:12,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211287590] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:12,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:12,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-27 15:39:12,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24140890] [2024-01-27 15:39:12,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:12,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:39:12,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:39:12,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:39:12,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:12,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 276 transitions, 4781 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:12,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:12,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:12,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:13,087 INFO L124 PetriNetUnfolderBase]: 2635/4371 cut-off events. [2024-01-27 15:39:13,087 INFO L125 PetriNetUnfolderBase]: For 94908/94908 co-relation queries the response was YES. [2024-01-27 15:39:13,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31537 conditions, 4371 events. 2635/4371 cut-off events. For 94908/94908 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 24652 event pairs, 312 based on Foata normal form. 8/4379 useless extension candidates. Maximal degree in co-relation 30771. Up to 1053 conditions per place. [2024-01-27 15:39:13,117 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 190 selfloop transitions, 154 changer transitions 3/348 dead transitions. [2024-01-27 15:39:13,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 348 transitions, 6152 flow [2024-01-27 15:39:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:39:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:39:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-01-27 15:39:13,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47491638795986624 [2024-01-27 15:39:13,119 INFO L175 Difference]: Start difference. First operand has 189 places, 276 transitions, 4781 flow. Second operand 13 states and 142 transitions. [2024-01-27 15:39:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 348 transitions, 6152 flow [2024-01-27 15:39:13,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 348 transitions, 5846 flow, removed 80 selfloop flow, removed 13 redundant places. [2024-01-27 15:39:13,374 INFO L231 Difference]: Finished difference. Result has 187 places, 275 transitions, 4806 flow [2024-01-27 15:39:13,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4806, PETRI_PLACES=187, PETRI_TRANSITIONS=275} [2024-01-27 15:39:13,375 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 162 predicate places. [2024-01-27 15:39:13,375 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 275 transitions, 4806 flow [2024-01-27 15:39:13,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:13,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:13,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:13,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:39:13,587 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:13,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2015572216, now seen corresponding path program 8 times [2024-01-27 15:39:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:13,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689277198] [2024-01-27 15:39:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689277198] [2024-01-27 15:39:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689277198] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749864381] [2024-01-27 15:39:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:39:13,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:13,638 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:13,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:39:13,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:39:13,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:13,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:13,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:13,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749864381] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:13,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:13,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-27 15:39:13,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852896294] [2024-01-27 15:39:13,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:39:13,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:39:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:39:13,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 275 transitions, 4806 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:13,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:13,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:13,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:14,944 INFO L124 PetriNetUnfolderBase]: 2996/4964 cut-off events. [2024-01-27 15:39:14,944 INFO L125 PetriNetUnfolderBase]: For 117883/117883 co-relation queries the response was YES. [2024-01-27 15:39:14,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36584 conditions, 4964 events. 2996/4964 cut-off events. For 117883/117883 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28431 event pairs, 165 based on Foata normal form. 58/5022 useless extension candidates. Maximal degree in co-relation 34489. Up to 931 conditions per place. [2024-01-27 15:39:14,977 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 162 selfloop transitions, 293 changer transitions 6/462 dead transitions. [2024-01-27 15:39:14,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 462 transitions, 7986 flow [2024-01-27 15:39:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:39:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:39:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 247 transitions. [2024-01-27 15:39:14,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2024-01-27 15:39:14,978 INFO L175 Difference]: Start difference. First operand has 187 places, 275 transitions, 4806 flow. Second operand 26 states and 247 transitions. [2024-01-27 15:39:14,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 462 transitions, 7986 flow [2024-01-27 15:39:15,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 462 transitions, 7594 flow, removed 35 selfloop flow, removed 12 redundant places. [2024-01-27 15:39:15,324 INFO L231 Difference]: Finished difference. Result has 206 places, 355 transitions, 6857 flow [2024-01-27 15:39:15,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6857, PETRI_PLACES=206, PETRI_TRANSITIONS=355} [2024-01-27 15:39:15,325 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 181 predicate places. [2024-01-27 15:39:15,325 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 355 transitions, 6857 flow [2024-01-27 15:39:15,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:15,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:15,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:15,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:39:15,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:15,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1830470982, now seen corresponding path program 9 times [2024-01-27 15:39:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:15,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087498326] [2024-01-27 15:39:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087498326] [2024-01-27 15:39:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087498326] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:15,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420705923] [2024-01-27 15:39:15,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:39:15,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:15,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:15,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:15,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:39:15,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:39:15,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:15,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:15,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:15,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420705923] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:15,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:15,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:39:15,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056237852] [2024-01-27 15:39:15,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:39:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:39:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:39:15,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:15,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 355 transitions, 6857 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:15,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:15,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:17,030 INFO L124 PetriNetUnfolderBase]: 3435/5773 cut-off events. [2024-01-27 15:39:17,030 INFO L125 PetriNetUnfolderBase]: For 156087/156087 co-relation queries the response was YES. [2024-01-27 15:39:17,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45189 conditions, 5773 events. 3435/5773 cut-off events. For 156087/156087 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 34675 event pairs, 150 based on Foata normal form. 34/5807 useless extension candidates. Maximal degree in co-relation 42162. Up to 1116 conditions per place. [2024-01-27 15:39:17,162 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 249 selfloop transitions, 330 changer transitions 5/585 dead transitions. [2024-01-27 15:39:17,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 585 transitions, 11123 flow [2024-01-27 15:39:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:39:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:39:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 282 transitions. [2024-01-27 15:39:17,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42278860569715143 [2024-01-27 15:39:17,173 INFO L175 Difference]: Start difference. First operand has 206 places, 355 transitions, 6857 flow. Second operand 29 states and 282 transitions. [2024-01-27 15:39:17,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 585 transitions, 11123 flow [2024-01-27 15:39:17,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 585 transitions, 10672 flow, removed 114 selfloop flow, removed 11 redundant places. [2024-01-27 15:39:17,844 INFO L231 Difference]: Finished difference. Result has 229 places, 430 transitions, 9144 flow [2024-01-27 15:39:17,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9144, PETRI_PLACES=229, PETRI_TRANSITIONS=430} [2024-01-27 15:39:17,845 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2024-01-27 15:39:17,845 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 430 transitions, 9144 flow [2024-01-27 15:39:17,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:17,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:17,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:17,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-27 15:39:18,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:39:18,058 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:18,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash -546398446, now seen corresponding path program 10 times [2024-01-27 15:39:18,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:18,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248772110] [2024-01-27 15:39:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:18,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248772110] [2024-01-27 15:39:18,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248772110] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244521139] [2024-01-27 15:39:18,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:39:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:18,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:18,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:39:18,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:39:18,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:18,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:18,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:18,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244521139] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:18,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:18,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:39:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750887933] [2024-01-27 15:39:18,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:39:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:39:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:39:18,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:18,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 430 transitions, 9144 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:18,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:18,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:18,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:19,735 INFO L124 PetriNetUnfolderBase]: 3862/6460 cut-off events. [2024-01-27 15:39:19,736 INFO L125 PetriNetUnfolderBase]: For 217603/217603 co-relation queries the response was YES. [2024-01-27 15:39:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53124 conditions, 6460 events. 3862/6460 cut-off events. For 217603/217603 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39515 event pairs, 1364 based on Foata normal form. 18/6478 useless extension candidates. Maximal degree in co-relation 50511. Up to 4947 conditions per place. [2024-01-27 15:39:19,802 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 473 selfloop transitions, 72 changer transitions 2/548 dead transitions. [2024-01-27 15:39:19,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 548 transitions, 11753 flow [2024-01-27 15:39:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:39:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:39:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2024-01-27 15:39:19,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320652173913043 [2024-01-27 15:39:19,805 INFO L175 Difference]: Start difference. First operand has 229 places, 430 transitions, 9144 flow. Second operand 16 states and 159 transitions. [2024-01-27 15:39:19,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 548 transitions, 11753 flow [2024-01-27 15:39:21,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 548 transitions, 11486 flow, removed 58 selfloop flow, removed 14 redundant places. [2024-01-27 15:39:21,141 INFO L231 Difference]: Finished difference. Result has 236 places, 463 transitions, 9743 flow [2024-01-27 15:39:21,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8895, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9743, PETRI_PLACES=236, PETRI_TRANSITIONS=463} [2024-01-27 15:39:21,147 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 211 predicate places. [2024-01-27 15:39:21,147 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 463 transitions, 9743 flow [2024-01-27 15:39:21,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:21,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:21,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:21,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:21,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:39:21,363 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:21,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash 547418766, now seen corresponding path program 11 times [2024-01-27 15:39:21,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:21,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237431189] [2024-01-27 15:39:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:21,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:21,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237431189] [2024-01-27 15:39:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237431189] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:21,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208084951] [2024-01-27 15:39:21,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:39:21,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:21,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:21,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:21,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:39:21,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:39:21,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:21,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:21,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:21,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208084951] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:21,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:21,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:39:21,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342287696] [2024-01-27 15:39:21,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:39:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:39:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:39:21,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:21,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 463 transitions, 9743 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:21,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:21,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:21,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:23,111 INFO L124 PetriNetUnfolderBase]: 4237/7063 cut-off events. [2024-01-27 15:39:23,112 INFO L125 PetriNetUnfolderBase]: For 272999/272999 co-relation queries the response was YES. [2024-01-27 15:39:23,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60177 conditions, 7063 events. 4237/7063 cut-off events. For 272999/272999 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 43637 event pairs, 640 based on Foata normal form. 90/7153 useless extension candidates. Maximal degree in co-relation 57525. Up to 3105 conditions per place. [2024-01-27 15:39:23,170 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 364 selfloop transitions, 253 changer transitions 3/621 dead transitions. [2024-01-27 15:39:23,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 621 transitions, 13185 flow [2024-01-27 15:39:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:39:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:39:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 212 transitions. [2024-01-27 15:39:23,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608695652173913 [2024-01-27 15:39:23,171 INFO L175 Difference]: Start difference. First operand has 236 places, 463 transitions, 9743 flow. Second operand 20 states and 212 transitions. [2024-01-27 15:39:23,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 621 transitions, 13185 flow [2024-01-27 15:39:24,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 621 transitions, 12866 flow, removed 123 selfloop flow, removed 7 redundant places. [2024-01-27 15:39:24,589 INFO L231 Difference]: Finished difference. Result has 260 places, 497 transitions, 11362 flow [2024-01-27 15:39:24,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11362, PETRI_PLACES=260, PETRI_TRANSITIONS=497} [2024-01-27 15:39:24,590 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 235 predicate places. [2024-01-27 15:39:24,590 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 497 transitions, 11362 flow [2024-01-27 15:39:24,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:24,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:24,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:24,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-27 15:39:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:39:24,795 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:24,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2121657326, now seen corresponding path program 12 times [2024-01-27 15:39:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302689274] [2024-01-27 15:39:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302689274] [2024-01-27 15:39:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302689274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091833553] [2024-01-27 15:39:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:39:24,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:24,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:24,945 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:24,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:39:25,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:39:25,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:25,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:25,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:25,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:39:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091833553] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:25,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-27 15:39:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53929415] [2024-01-27 15:39:25,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:39:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:39:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:39:25,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:25,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 497 transitions, 11362 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:25,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:25,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:25,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:26,772 INFO L124 PetriNetUnfolderBase]: 4451/7411 cut-off events. [2024-01-27 15:39:26,773 INFO L125 PetriNetUnfolderBase]: For 350053/350053 co-relation queries the response was YES. [2024-01-27 15:39:26,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67882 conditions, 7411 events. 4451/7411 cut-off events. For 350053/350053 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 45921 event pairs, 633 based on Foata normal form. 58/7469 useless extension candidates. Maximal degree in co-relation 67251. Up to 2890 conditions per place. [2024-01-27 15:39:26,833 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 334 selfloop transitions, 284 changer transitions 2/621 dead transitions. [2024-01-27 15:39:26,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 621 transitions, 14335 flow [2024-01-27 15:39:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:39:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:39:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-01-27 15:39:26,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152173913043478 [2024-01-27 15:39:26,834 INFO L175 Difference]: Start difference. First operand has 260 places, 497 transitions, 11362 flow. Second operand 20 states and 191 transitions. [2024-01-27 15:39:26,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 621 transitions, 14335 flow [2024-01-27 15:39:28,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 621 transitions, 14038 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-01-27 15:39:28,267 INFO L231 Difference]: Finished difference. Result has 283 places, 520 transitions, 12788 flow [2024-01-27 15:39:28,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11130, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12788, PETRI_PLACES=283, PETRI_TRANSITIONS=520} [2024-01-27 15:39:28,268 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 258 predicate places. [2024-01-27 15:39:28,269 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 520 transitions, 12788 flow [2024-01-27 15:39:28,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:28,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:28,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:28,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:28,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:28,484 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:28,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash -836419310, now seen corresponding path program 13 times [2024-01-27 15:39:28,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403709905] [2024-01-27 15:39:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403709905] [2024-01-27 15:39:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403709905] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88934361] [2024-01-27 15:39:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:39:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:28,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:28,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:39:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:28,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:28,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:28,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:39:28,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88934361] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:28,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:28,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-27 15:39:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677115001] [2024-01-27 15:39:28,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:39:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:39:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:39:28,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:28,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 520 transitions, 12788 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:28,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:28,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:28,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:30,328 INFO L124 PetriNetUnfolderBase]: 4448/7406 cut-off events. [2024-01-27 15:39:30,328 INFO L125 PetriNetUnfolderBase]: For 386092/386092 co-relation queries the response was YES. [2024-01-27 15:39:30,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71159 conditions, 7406 events. 4448/7406 cut-off events. For 386092/386092 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 46167 event pairs, 1649 based on Foata normal form. 8/7414 useless extension candidates. Maximal degree in co-relation 70387. Up to 5976 conditions per place. [2024-01-27 15:39:30,402 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 502 selfloop transitions, 71 changer transitions 2/576 dead transitions. [2024-01-27 15:39:30,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 576 transitions, 14589 flow [2024-01-27 15:39:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:39:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:39:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-01-27 15:39:30,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624505928853755 [2024-01-27 15:39:30,403 INFO L175 Difference]: Start difference. First operand has 283 places, 520 transitions, 12788 flow. Second operand 11 states and 117 transitions. [2024-01-27 15:39:30,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 576 transitions, 14589 flow [2024-01-27 15:39:32,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 576 transitions, 14375 flow, removed 63 selfloop flow, removed 13 redundant places. [2024-01-27 15:39:32,096 INFO L231 Difference]: Finished difference. Result has 278 places, 517 transitions, 12715 flow [2024-01-27 15:39:32,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12715, PETRI_PLACES=278, PETRI_TRANSITIONS=517} [2024-01-27 15:39:32,096 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2024-01-27 15:39:32,096 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 517 transitions, 12715 flow [2024-01-27 15:39:32,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:32,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:32,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:32,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:32,307 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:32,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 448322125, now seen corresponding path program 14 times [2024-01-27 15:39:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:32,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543204425] [2024-01-27 15:39:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:32,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:39:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543204425] [2024-01-27 15:39:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543204425] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701595620] [2024-01-27 15:39:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:39:32,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:32,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:32,351 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:32,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:39:32,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:39:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:32,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:39:32,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:39:32,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:39:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701595620] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:32,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:32,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-01-27 15:39:32,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915207778] [2024-01-27 15:39:32,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:32,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:39:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:39:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:39:32,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:39:32,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 517 transitions, 12715 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:32,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:32,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:39:32,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:34,747 INFO L124 PetriNetUnfolderBase]: 5900/10686 cut-off events. [2024-01-27 15:39:34,747 INFO L125 PetriNetUnfolderBase]: For 547094/547647 co-relation queries the response was YES. [2024-01-27 15:39:34,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100560 conditions, 10686 events. 5900/10686 cut-off events. For 547094/547647 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 81489 event pairs, 602 based on Foata normal form. 269/10842 useless extension candidates. Maximal degree in co-relation 98709. Up to 2733 conditions per place. [2024-01-27 15:39:34,875 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 898 selfloop transitions, 10 changer transitions 101/1170 dead transitions. [2024-01-27 15:39:34,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1170 transitions, 31278 flow [2024-01-27 15:39:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:39:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:39:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-27 15:39:34,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304347826086957 [2024-01-27 15:39:34,876 INFO L175 Difference]: Start difference. First operand has 278 places, 517 transitions, 12715 flow. Second operand 5 states and 84 transitions. [2024-01-27 15:39:34,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1170 transitions, 31278 flow [2024-01-27 15:39:38,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1170 transitions, 31024 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-01-27 15:39:38,457 INFO L231 Difference]: Finished difference. Result has 275 places, 513 transitions, 12427 flow [2024-01-27 15:39:38,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12606, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12427, PETRI_PLACES=275, PETRI_TRANSITIONS=513} [2024-01-27 15:39:38,458 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2024-01-27 15:39:38,458 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 513 transitions, 12427 flow [2024-01-27 15:39:38,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:38,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:38,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:38,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:39:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:38,670 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:38,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1133948785, now seen corresponding path program 15 times [2024-01-27 15:39:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714786779] [2024-01-27 15:39:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:38,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:38,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714786779] [2024-01-27 15:39:38,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714786779] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320326834] [2024-01-27 15:39:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:39:38,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:38,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:38,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:39:38,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-27 15:39:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:38,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:39:38,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:38,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:39,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320326834] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:39,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:39,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-27 15:39:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116286701] [2024-01-27 15:39:39,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:39:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:39:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:39:39,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:39,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 513 transitions, 12427 flow. Second operand has 20 states, 20 states have (on average 6.35) internal successors, (127), 20 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:39,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:39,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:39,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:43,556 INFO L124 PetriNetUnfolderBase]: 10617/17506 cut-off events. [2024-01-27 15:39:43,557 INFO L125 PetriNetUnfolderBase]: For 979338/979338 co-relation queries the response was YES. [2024-01-27 15:39:43,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176375 conditions, 17506 events. 10617/17506 cut-off events. For 979338/979338 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 122434 event pairs, 438 based on Foata normal form. 196/17702 useless extension candidates. Maximal degree in co-relation 174416. Up to 3452 conditions per place. [2024-01-27 15:39:44,016 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 479 selfloop transitions, 612 changer transitions 31/1123 dead transitions. [2024-01-27 15:39:44,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1123 transitions, 26859 flow [2024-01-27 15:39:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:39:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:39:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 431 transitions. [2024-01-27 15:39:44,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258893280632411 [2024-01-27 15:39:44,018 INFO L175 Difference]: Start difference. First operand has 275 places, 513 transitions, 12427 flow. Second operand 44 states and 431 transitions. [2024-01-27 15:39:44,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1123 transitions, 26859 flow [2024-01-27 15:39:51,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1123 transitions, 26477 flow, removed 191 selfloop flow, removed 0 redundant places. [2024-01-27 15:39:51,151 INFO L231 Difference]: Finished difference. Result has 338 places, 749 transitions, 21064 flow [2024-01-27 15:39:51,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12407, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=21064, PETRI_PLACES=338, PETRI_TRANSITIONS=749} [2024-01-27 15:39:51,152 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 313 predicate places. [2024-01-27 15:39:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 749 transitions, 21064 flow [2024-01-27 15:39:51,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.35) internal successors, (127), 20 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:51,152 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:51,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:51,354 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1496431767, now seen corresponding path program 16 times [2024-01-27 15:39:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971850806] [2024-01-27 15:39:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:51,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:51,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971850806] [2024-01-27 15:39:51,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971850806] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:51,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514701544] [2024-01-27 15:39:51,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:39:51,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:51,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:51,481 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:51,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:39:51,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:39:51,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:51,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:39:51,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:51,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:51,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514701544] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:51,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:51,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-01-27 15:39:51,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430606494] [2024-01-27 15:39:51,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:51,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:39:51,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:39:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:39:51,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:51,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 749 transitions, 21064 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:51,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:51,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:58,014 INFO L124 PetriNetUnfolderBase]: 12866/21199 cut-off events. [2024-01-27 15:39:58,015 INFO L125 PetriNetUnfolderBase]: For 1560286/1560286 co-relation queries the response was YES. [2024-01-27 15:39:58,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232897 conditions, 21199 events. 12866/21199 cut-off events. For 1560286/1560286 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 151402 event pairs, 622 based on Foata normal form. 74/21273 useless extension candidates. Maximal degree in co-relation 230550. Up to 6748 conditions per place. [2024-01-27 15:39:58,533 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 449 selfloop transitions, 886 changer transitions 89/1425 dead transitions. [2024-01-27 15:39:58,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1425 transitions, 40419 flow [2024-01-27 15:39:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:39:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:39:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 193 transitions. [2024-01-27 15:39:58,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416475972540046 [2024-01-27 15:39:58,535 INFO L175 Difference]: Start difference. First operand has 338 places, 749 transitions, 21064 flow. Second operand 19 states and 193 transitions. [2024-01-27 15:39:58,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1425 transitions, 40419 flow [2024-01-27 15:40:13,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1425 transitions, 38566 flow, removed 538 selfloop flow, removed 14 redundant places. [2024-01-27 15:40:13,762 INFO L231 Difference]: Finished difference. Result has 351 places, 1132 transitions, 34197 flow [2024-01-27 15:40:13,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=20224, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34197, PETRI_PLACES=351, PETRI_TRANSITIONS=1132} [2024-01-27 15:40:13,763 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 326 predicate places. [2024-01-27 15:40:13,764 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1132 transitions, 34197 flow [2024-01-27 15:40:13,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:13,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:13,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:13,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:40:13,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:13,974 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:13,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1672523643, now seen corresponding path program 17 times [2024-01-27 15:40:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:40:13,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561117505] [2024-01-27 15:40:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:13,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:40:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:40:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561117505] [2024-01-27 15:40:14,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561117505] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:40:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266054024] [2024-01-27 15:40:14,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:40:14,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:14,044 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:40:14,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:40:14,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-27 15:40:14,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:40:14,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:40:14,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:14,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:14,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266054024] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:14,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:40:14,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-27 15:40:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521477355] [2024-01-27 15:40:14,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:14,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:40:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:40:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:40:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:40:14,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:40:14,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1132 transitions, 34197 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:14,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:14,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:40:14,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:23,677 INFO L124 PetriNetUnfolderBase]: 15920/25987 cut-off events. [2024-01-27 15:40:23,677 INFO L125 PetriNetUnfolderBase]: For 2086866/2086866 co-relation queries the response was YES. [2024-01-27 15:40:23,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296457 conditions, 25987 events. 15920/25987 cut-off events. For 2086866/2086866 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 188196 event pairs, 1412 based on Foata normal form. 58/26045 useless extension candidates. Maximal degree in co-relation 294099. Up to 6316 conditions per place. [2024-01-27 15:40:24,270 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 748 selfloop transitions, 775 changer transitions 10/1534 dead transitions. [2024-01-27 15:40:24,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1534 transitions, 46447 flow [2024-01-27 15:40:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:40:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:40:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 219 transitions. [2024-01-27 15:40:24,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2024-01-27 15:40:24,272 INFO L175 Difference]: Start difference. First operand has 351 places, 1132 transitions, 34197 flow. Second operand 21 states and 219 transitions. [2024-01-27 15:40:24,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1534 transitions, 46447 flow [2024-01-27 15:40:50,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1534 transitions, 46053 flow, removed 177 selfloop flow, removed 5 redundant places. [2024-01-27 15:40:50,509 INFO L231 Difference]: Finished difference. Result has 374 places, 1288 transitions, 40694 flow [2024-01-27 15:40:50,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=34007, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=40694, PETRI_PLACES=374, PETRI_TRANSITIONS=1288} [2024-01-27 15:40:50,510 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 349 predicate places. [2024-01-27 15:40:50,510 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1288 transitions, 40694 flow [2024-01-27 15:40:50,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:50,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:50,510 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:50,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:50,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:50,721 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:50,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1117436249, now seen corresponding path program 18 times [2024-01-27 15:40:50,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:40:50,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139263088] [2024-01-27 15:40:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:40:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:50,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:40:50,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139263088] [2024-01-27 15:40:50,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139263088] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:40:50,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400346088] [2024-01-27 15:40:50,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:40:50,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:50,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:50,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:40:50,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:40:50,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:40:50,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:40:50,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:40:50,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:50,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:50,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400346088] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:50,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:40:50,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-27 15:40:50,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504987861] [2024-01-27 15:40:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:50,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:40:50,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:40:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:40:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:40:50,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:40:50,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1288 transitions, 40694 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:50,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:50,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:40:50,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:03,481 INFO L124 PetriNetUnfolderBase]: 18862/30855 cut-off events. [2024-01-27 15:41:03,481 INFO L125 PetriNetUnfolderBase]: For 2697896/2697896 co-relation queries the response was YES. [2024-01-27 15:41:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366911 conditions, 30855 events. 18862/30855 cut-off events. For 2697896/2697896 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 228588 event pairs, 1130 based on Foata normal form. 146/31001 useless extension candidates. Maximal degree in co-relation 364737. Up to 10636 conditions per place. [2024-01-27 15:41:04,240 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 628 selfloop transitions, 1274 changer transitions 9/1912 dead transitions. [2024-01-27 15:41:04,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1912 transitions, 61628 flow [2024-01-27 15:41:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:41:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:41:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 226 transitions. [2024-01-27 15:41:04,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2024-01-27 15:41:04,244 INFO L175 Difference]: Start difference. First operand has 374 places, 1288 transitions, 40694 flow. Second operand 22 states and 226 transitions. [2024-01-27 15:41:04,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1912 transitions, 61628 flow